[REL] bump to v0.15.0

Closes #95

.gitignore

@@ -23,4 +23,4 @@ package-lock.json
 node_modules
 
 # Extras temp file
-/extras/owl.js
+/tools/owl.js

README.md

@@ -10,7 +10,7 @@ other Odoo related projects. OWL's main feature is a _declarative component syst
 
 **Try it online!** An online playground is available at [https://odoo.github.io/owl/playground](https://odoo.github.io/owl/playground) to let you experiment with the OWL framework.
 
-## OWL's design principles
+## OWL's Design Principles
 
 OWL is designed to be used in highly dynamic applications where changing
 requirements are common, code needs to be maintained by large teams.
@@ -30,12 +30,20 @@ Owl is not designed to be fast or small (even though it is quite good on those
 two topics). If you are interested in a comparison with React or Vue, you will
 find some more information [here](doc/comparison.md).
 
-# Example
+## Example
 
 Here is a short example to illustrate interactive widgets:
 
+```xml
+<templates>
+  <button t-name="Counter" t-on-click="increment">
+    Click Me! [<t t-esc="state.value"/>]
+  </button>
+</templates>
+```
+
 ```javascript
-class ClickCounter extends owl.Component {
+class Counter extends owl.Component {
   state = { value: 0 };
 
   increment() {
@@ -43,36 +51,33 @@ class ClickCounter extends owl.Component {
   }
 }
 
-const TEMPLATES = `
-    <button t-name="ClickCounter" t-on-click="increment">
-        Click Me! [<t t-esc="state.value"/>]
-    </button>`;
-
 const qweb = new owl.QWeb(TEMPLATES);
-const counter = new ClickCounter({ qweb });
+const counter = new Counter({ qweb });
 counter.mount(document.body);
 ```
 
-More interesting examples can be found on the [playground](https://odoo.github.io/owl/playground) application.
+Note that we assume here that the xml templates are available in the `TEMPLATES`
+string. More interesting examples can be found on the
+[playground](https://odoo.github.io/owl/playground) application.
 
 ## Installing/Building
 
 If you want to use a simple `<script>` tag, the last release can be downloaded here:
 
-- [owl-0.13.0.js](https://github.com/odoo/owl/releases/download/v0.13.0/owl.js)
+- [owl-0.15.0.js](https://github.com/odoo/owl/releases/download/v0.15.0/owl.js)
-- [owl-0.13.0.min.js](https://github.com/odoo/owl/releases/download/v0.13.0/owl.min.js)
+- [owl-0.15.0.min.js](https://github.com/odoo/owl/releases/download/v0.15.0/owl.min.js)
 
 Some npm scripts are available:
 
-| Command                | Description                                                                     |
+| Command               | Description                                                                  |
-| ---------------------- | ------------------------------------------------------------------------------- |
+| --------------------- | ---------------------------------------------------------------------------- |
-| `npm install`          | install every dependency required for this project                              |
+| `npm install`         | install every dependency required for this project                           |
-| `npm run build`        | build a bundle of _owl_ in the _/dist/_ folder                                  |
+| `npm run build`       | build a bundle of _owl_ in the _/dist/_ folder                               |
-| `npm run minify`       | minify the prebuilt owl.js file                                                 |
+| `npm run minify`      | minify the prebuilt owl.js file                                              |
-| `npm run test`         | run all tests                                                                   |
+| `npm run test`        | run all tests                                                                |
-| `npm run test:watch`   | run all tests, and keep a watcher                                               |
+| `npm run test:watch`  | run all tests, and keep a watcher                                            |
-| `npm run extras`       | build extras applications, start a static server (see [here](extras/readme.md)) |
+| `npm run tools`       | build tools applications, start a static server (see [here](doc/tooling.md)) |
-| `npm run extras:watch` | same as `extras`, but with a watcher to rebuild owl                             |
+| `npm run tools:watch` | same as `tools`, but with a watcher to rebuild owl                           |
 
 ## Documentation
 

doc/animations.md

@@ -38,7 +38,8 @@ keyboard) the button.
 A more complex situation occurs when we want to transition an element in or out
 of the page. For example, we may want a fade-in and fade-out effect.
 
-The `t-transition` directive is here to help us (see [QWeb documentation](qweb.md#t-transition-directive)).
+The `t-transition` directive is here to help us. It works on html elements and
+on components, by adding and removing some css classes.
 
 To perform useful transition effects, whenever an element appears or disappears,
 it is necessary to add/remove some css style or class at some precise moment in

doc/comparison.md

@@ -7,6 +7,8 @@ In this page, we try to highlight some of these differences. Obviously, some
 effort was done to be fair. However, if you disagree with some of the points
 discussed, feel free to open an issue/submit a PR to correct this text.
 
+## Content
+
 - [Size](#size)
 - [Tooling/Build Step](#toolingbuild-step)
 - [Templating](#templating)
@@ -14,7 +16,7 @@ discussed, feel free to open an issue/submit a PR to correct this text.
 - [Reactiveness](#reactiveness)
 - [State Management](#state-management)
 
-### Size
+## Size
 
 OWL is intended to be small and to work at a slightly lower level of abstraction
 than React and Vue. Also, jQuery is not the same kind of framework, but it is interesting to compare.
@@ -26,7 +28,7 @@ than React and Vue. Also, jQuery is not the same kind of framework, but it is in
 | React + ReactDOM + Redux |                 | 40kb                     |
 | jQuery                   | 86kb            | 30kb                     |
 
-### Tooling/Build step
+## Tooling/Build step
 
 OWL is designed to be easy to use in a standalone way. For various reasons,
 Odoo does not want to rely on standard web tools (such as webpack), and OWL can
@@ -84,7 +86,7 @@ This has the advantage of having the full power of Javascript, but is less
 structured than a template language. Note that the tooling is quite impressive:
 there is a syntax highlighter for jsx here on github!
 
-### Asynchronous rendering
+## Asynchronous Rendering
 
 This is actually a big difference between OWL and React/Vue: components in OWL
 are totally asynchronous. They have two asynchronous hooks in their lifecycle:
@@ -115,7 +117,7 @@ extremely powerful as well, as demonstrated by the Odoo Web Client.
 Lazy loading static libraries can obviously be done with React/Vue, but it is
 more convoluted.
 
-### Reactiveness
+## Reactiveness
 
 React has a simple model: whenever the state changes, it is
 replaced with a new state (via the setState method). Then, the DOM is patched.
@@ -129,7 +131,7 @@ Owl is closer to vue: it also tracks magically the state properties, but it does
 only increment a counter whenever it changes (and a _deep_ counter for each of
 its parents). This assumes that the state is actually a tree.
 
-### State Management
+## State Management
 
 Managing the state of an application is a tricky issue. Many solutions have
 been proposed these last few years. It also depends on the kind of application we
@@ -190,5 +192,5 @@ keeps track of who get data, and retrigger a render when it was changed.
 
 Owl store is a little bit like a mix of redux and vuex: it has mutations and
 actions, like VueX, it keeps track of the state changes, but it does not notify
-a component when the state changes.  Instead, components need to connect to the
+a component when the state changes. Instead, components need to connect to the
 store like in redux, with a function that will listen to the relevant state.

doc/component.md

@@ -4,6 +4,7 @@
 
 - [Overview](#overview)
 - [Example](#example)
+- [Root Widget And Environment](#root-widget-and-environment)
 - [Reference](#reference)
   - [Properties](#properties)
   - [Static Properties](#static-properties)
@@ -11,11 +12,14 @@
   - [Lifecycle](#lifecycle)
   - [Composition](#composition)
   - [Event Handling](#event-handling)
-  - [`t-key` directive](#t-key-directive)
+  - [Form Input Bindings](#form-input-bindings)
-  - [`t-mounted` directive](#t-mounted-directive)
+  - [`t-key` Directive](#t-key-directive)
+  - [`t-mounted` Directive](#t-mounted-directive)
+  - [Semantics](#semantics)
   - [Props Validation](#props-validation)
-  - [Keeping References](#keeping-references])
+  - [References](#references)
-  - [Asynchronous rendering](#asynchronous-rendering)
+  - [Slots](#slots)
+  - [Asynchronous Rendering](#asynchronous-rendering)
 
 ## Overview
 
@@ -72,6 +76,30 @@ a state object is defined. It is not mandatory to use the state object, but it
 is certainly encouraged. The state object is [observed](observer.md), and any
 change to it will cause a rerendering.
 
+## Root Widget And Environment
+
+Most of the time, Owl widget will be created automatically by the `t-widget`
+directive in a template. There is however an obvious exception: the root widget
+of an Owl application has to be created manually:
+
+```js
+class App extends owl.Component { ... }
+
+const qweb = new owl.QWeb(TEMPLATES);
+const env = { qweb: qweb };
+const app = new App(env);
+app.mount(document.body);
+```
+
+The root widget needs an environment. In Owl, an environment is an object with
+a `qweb` key, which has to be a [QWeb](qweb.md) instance. This qweb instance will
+be used to render everything.
+
+The environment will be given to each child, unchanged, in the `env` property.
+This can be very useful to share common information/methods. For example, all
+rpcs can be made through a `rpc` method in the environment. This makes it very
+easy to test a component.
+
 ## Reference
 
 An Owl component is a small class which represent a widget or some UI element.
@@ -146,11 +174,6 @@ find a template with the component name (or one of its ancestor).
   if we have a `isMobile` key in the environment, to decide if we want a mobile
   interface or a destkop one.
 
-- **`set(target, key, value)`**. This method is necessary in some cases when we
-  need to modify the state of the component in a way that is not visible to the
-  observer (see [observer's technical limitations](observer.md#technical-limitations)).
-  For example, if we need to add a key to the state.
-
 - **`destroy()`**. As its name suggests, this method will remove the component,
   and perform all necessary cleanup, such as unmounting the component, its children,
   removing the parent/children relationship. This method should almost never be
@@ -165,13 +188,13 @@ a owl component:
 
 | Method                                           | Description                                           |
 | ------------------------------------------------ | ----------------------------------------------------- |
-| **[constructor](#constructor)**                  | constructor                                           |
+| **[constructor](#constructorparent-props)**      | constructor                                           |
-| **[willStart](#willStart)**                      | async, before first rendering                         |
+| **[willStart](#willstart)**                      | async, before first rendering                         |
 | **[mounted](#mounted)**                          | just after component is rendered and added to the DOM |
 | **[willUpdateProps](#willupdatepropsnextprops)** | async, before props update                            |
 | **[willPatch](#willpatch)**                      | just before the DOM is patched                        |
 | **[patched](#patchedsnapshot)**                  | just after the DOM is patched                         |
-| **[willUnmount](#willUnmount)**                  | just before removing component from DOM               |
+| **[willUnmount](#willunmount)**                  | just before removing component from DOM               |
 
 Notes:
 
@@ -312,7 +335,7 @@ the DOM. This is a good place to remove some listeners, for example.
 
 This is the opposite method of `mounted`.
 
-## Composition
+### Composition
 
 The example above shows a QWeb template with a `t-on-click` directive. Widget
 templates are standard [QWeb](qweb.md) templates, but with an extra directive:
@@ -375,11 +398,11 @@ Note that there are some restrictions on prop names: `class`, `style` and any
 string which starts with `t-` are not allowed.
 
 The `t-widget` directive also accepts dynamic values with string interpolation
-(like the [`t-attf-`](#dynamic-attributes-t-att-and-t-attf-directives) directive):
+(like the [`t-attf-`](qweb.md#dynamic-attributes) directive):
 
 ```xml
 <div t-name="ParentWidget">
-    <t t-widget="ChildWidget#{id}"/>
+    <t t-widget="ChildWidget{{id}}"/>
 </div>
 ```
 
@@ -390,14 +413,6 @@ class ParentWidget {
 }
 ```
 
-Similarly to `t-attf-`, there is an alternate form of string interpolation:
-
-```xml
-<div t-name="ParentWidget">
-    <t t-widget="ChildWidget{{id}}"/>
-</div>
-```
-
 **CSS and style:** there is some specific support to allow the parent to declare
 additional css classes or style for the sub widget: css declared in `class`, `style`, `t-att-class` or `t-att-style` will be added to the
 root widget element.
@@ -419,7 +434,7 @@ with a class object:
 <t t-widget="MyWidget" t-att-class="{a: state.flagA, b: state.flagB}" />
 ```
 
-### Event handling
+### Event Handling
 
 In a component's template, it is useful to be able to register handlers on some
 elements to some specific events. This is what makes a template _alive_. There
@@ -505,7 +520,99 @@ The `t-on` directive also allows to prebind some arguments. For example,
 Here, `expr` is a valid Owl expression, so it could be `true` or some variable
 from the rendering context.
 
-### `t-key` directive
+### Form Input Bindings
+
+It is very common to need to be able to read the value out of an html `input` (or
+`textarea`, or `select`) in order to use it (note: it does not need to be in a
+form!). A possible way to do this is to do it by hand:
+
+```js
+class Form extends owl.Component {
+  state = { text: "" };
+
+  _updateInputValue(event) {
+    this.state.text = event.target.value;
+  }
+}
+```
+
+```xml
+<div>
+  <input t-on-input="_updateInputValue"/>
+  <span t-esc="state.text"/>
+</div>
+```
+
+This works. However, this requires a little bit of _plumbing_ code. Also, the
+plumbing code is slightly different if you need to interact with a checkbox,
+or with radio buttons, or with select tags.
+
+To help with this situation, Owl has a builtin directive `t-model`: its value
+is the (top-level) name in the state object. With the `t-model` directive, we
+can write a shorter code, equivalent to the previous example:
+
+```js
+class Form extends owl.Component {
+  state = { text: "" };
+}
+```
+
+```xml
+<div>
+  <input t-model="text"/>
+  <span t-esc="state.text"/>
+</div>
+```
+
+The `t-model` directive works with `<input>`, `<input type="checkbox">`,
+`<input type="radio">`, `<textarea>` and `<select>`:
+
+```xml
+<div>
+    <div>Text in an input: <input t-model="someVal"/></div>
+    <div>Textarea: <textarea t-model="otherVal"/></div>
+    <div>Boolean value: <input type="checkbox" t-model="someFlag"/></div>
+    <div>Selection:
+        <select t-model="color">
+            <option value="">Select a color</option>
+            <option value="red">Red</option>
+            <option value="blue">Blue</option>
+        </select>
+    </div>
+    <div>
+        Selection with radio buttons:
+        <span>
+            <input type="radio" name="color" id="red" value="red" t-model="color"/>
+            <label for="red">Red</label>
+        </span>
+        <span>
+            <input type="radio" name="color" id="blue" value="blue" t-model="color"/>
+            <label for="blue">Blue</label>
+        </span>
+    </div>
+</div>
+```
+
+Like event handling, the `t-model` directive accepts some modifiers:
+
+| Modifier  | Description                                                          |
+| --------- | -------------------------------------------------------------------- |
+| `.lazy`   | update the value on the `change` event (default is on `input` event) |
+| `.number` | tries to parse the value to a number (using `parseFloat`)            |
+| `.trim`   | trim the resulting value                                             |
+
+For example:
+
+```xml
+<input t-model.lazy="someVal"/>
+```
+
+These modifiers can be combined. For instance, `t-model.lazy.number` will only
+update a number whenever the change is done.
+
+Note: the online playground has an example to show how it works.
+
+### `t-key` Directive
 
 Even though Owl tries to be as declarative as possible, some DOM state is still
 locked inside the DOM: for example, the scrolling state, the current user selection,
@@ -529,7 +636,7 @@ There are three main use cases:
 - _animations_: give a different identity to a component. Ex: thread id with
   animations on add/remove message.
 
-### `t-mounted` directive
+### `t-mounted` Directive
 
 The `t-mounted` directive allows to register a callback to execute whenever the node
 is inserted into the DOM.
@@ -721,7 +828,7 @@ Examples:
   };
 ```
 
-### Keeping references
+### References
 
 The `t-ref` directive helps a component keep reference to some inside part of it.
 Like the `t-on` directive, it can work either on a DOM node, or on a component:
@@ -749,26 +856,94 @@ Note: if used on a component, the reference will be set in the `refs`
 variable between `willPatch` and `patched`.
 
 The `t-ref` directive also accepts dynamic values with string interpolation
-(like the [`t-attf-`](#dynamic-attributes-t-att-and-t-attf-directives) and
+(like the [`t-attf-`](qweb.md#dynamic-attributes) and
-[`t-widget-`](#component-t-widget) directives). For example, if we have
+`t-widget` directives). For example, if we have
 `id` set to 44 in the rendering context,
 
 ```xml
-<div t-ref="widget_#{id}"/>
+<div t-ref="widget_{{id}}"/>
 ```
 
 ```js
 this.refs.widget_44;
 ```
 
-Similarly to `t-attf-` and `t-widget`, there is an alternate form of string
+### Slots
-interpolation:
+
+To make generic components, it is useful to be able for a parent widget to _inject_
+some sub template, but still be the owner. For example, a generic dialog widget
+will need to render some content, some footer, but with the parent as the
+rendering context.
+
+This is what _slots_ are for.
 
 ```xml
-<div t-ref="widget_{{id}}"/>
+<div t-name="Dialog" class="modal">
+  <div class="modal-title"><t t-esc="props.title"/></div>
+  <div class="modal-content">
+    <t t-slot="content"/>
+  </div>
+  <div class="modal-footer">
+    <t t-slot="footer"/>
+  </div>
+</div>
 ```
 
-### Asynchronous rendering
+Slots are defined by the caller, with the `t-set` directive:
+
+```xml
+<div t-name="SomeWidget">
+  <div>some widget</div>
+  <t t-widget="Dialog" title="Some Dialog">
+    <t t-set="content">
+      <div>hey</div>
+    </t>
+    <t t-set="footer">
+      <button t-on-click="doSomething">ok</button>
+    </t>
+  </t>
+</div>
+```
+
+In this example, the widget `Dialog` will render the slots `content` and `footer`
+with its parent as rendering context. This means that clicking on the button
+will execute the `doSomething` method on the parent, not on the dialog.
+
+Warning! Slots have a technical constraint: the result of the slot rendering
+should have exactly one root node. So,
+
+```xml
+<t t-set="content">
+  <div>A</div>
+  <div>B</div>
+</t>
+```
+
+is not allowed. A workaround could be to wrap the content in a div:
+
+```xml
+<div t-set="content">
+  <div>A</div>
+  <div>B</div>
+</div>
+```
+
+Default slot: the first element inside the widget which is not a named slot will
+be considered the `default` slot. For example:
+
+```xml
+<div t-name="Parent">
+  <t t-widget="Child">
+    <span>some content</span>
+  </t>
+</div>
+
+<div t-name="Child">
+  <t t-slot="default"/>
+</div>
+```
+
+### Asynchronous Rendering
 
 Working with asynchronous code always adds a lot of complexity to a system. Whenever
 different parts of a system are active at the same time, one needs to think
@@ -786,9 +961,25 @@ There are two different common problems with Owl asynchronous rendering model:
 
 Here are a few tips on how to work with asynchronous widgets:
 
-1. minimize the use of asynchronous widgets!
+1. Minimize the use of asynchronous widgets!
 2. Maybe move the asynchronous logic in a store, which then triggers (mostly)
    synchronous renderings
 3. Lazy loading external libraries is a good use case for async rendering. This
    is mostly fine, because we can assume that it will only takes a fraction of a
    second, and only once (see `owl.utils.loadJS`)
+4. For all the other cases, the `t-asyncroot` directive (to use alongside
+   `t-widget`) is there to help you. When this directive is met, a new rendering
+   sub tree is created, such that the rendering of that component (and its
+   children) is not tied to the rendering of the rest of the interface. It can
+   be used on an asynchronous component, to prevent it from delaying the
+   rendering of the whole interface, or on a synchronous one, such that its
+   rendering isn't delayed by other (asynchronous) components. Note that this
+   directive has no effect on the first rendering, but only on subsequent ones
+   (triggered by state or props changes).
+
+   ```xml
+   <div t-name="ParentWidget">
+     <t t-widget="SyncChild"/>
+     <t t-widget="AsyncChild" t-asyncroot="1"/>
+   </div>
+   ```

doc/event_bus.md

@@ -0,0 +1,27 @@
+# 🦉 Event Bus 🦉
+
+It is sometimes useful to use a `Bus` to communicate informations between various
+parts of the code. Owl has a very simple bus class, which manages subscriptions,
+triggering events, and callbacks.
+
+```js
+const bus = new owl.EventBus();
+
+bus.on("some-event", null, function(...args) {
+  console.log(...args);
+});
+
+bus.trigger("some-event", 1, 2, 3);
+// [1,2,3] will be logged to the console
+```
+
+Its API is:
+
+| Method                           | Description                       |
+| -------------------------------- | --------------------------------- |
+| `on(eventType, owner, callback)` | add a listener                    |
+| `off(eventType, owner)`          | remove all listeners for an owner |
+| `trigger(eventType, ...args)`    | trigger an event                  |
+| `clear`                          | remove all subscriptions          |
+
+Note that the [`Store`](store.md) is an example of an `EventBus`.

doc/observer.md

@@ -20,35 +20,31 @@ obj.a.b = 2;
 ## Technical Limitations
 
 Since the observer uses getters and setters, it is actually unable to react to
-changes in two situations:
+changes in three situations:
 
-- adding a key to an object:
+- adding a key to an object
+- deleting a key from an object
+- modifying an array by setting a new value at a given index
 
-  ```javascript
+In those situations, we need a way to tell the observer that something happened.
-  const observer = new owl.Observer();
+This can be done by using the `set` and `delete` (only for objects) static
-  const obj = { a: 1 };
+methods of the `Observer`.
-  observer.observe(obj);
-  obj.b = 2; // will do nothing
-  ```
 
-  In that case, we need a way to tell the observer that something happened.
+```javascript
-  This can be done by using the `set` method:
+const observer = new owl.Observer();
+const obj = { a: 1 };
+observer.observe(obj);
+obj.b = 2; // won't notify the change
+owl.Observer.set(obj, "b", 2); // will notify the change
 
-  ```javascript
+delete obj.b; // won't notify the change
-  observer.set(obj, "b", 2);
+owl.Observer.delete(obj, "b"); // will notify the change
-  ```
+```
 
-- modifying an array by setting a new value at a given index:
+```javascript
-
+const observer = new owl.Observer();
-  ```javascript
+const arr = ["a"];
-  const observer = new owl.Observer();
+observer.observe(arr);
-  const obj = { todos: [{ id: 1, text: "todo" }] };
+arr[0] = "b"; // won't notify the change
-  observer.observe(obj);
+owl.Observer.set(arr, 0, "b"); // will notify the change
-  obj[0] = { id: 2, text: "othertodo" }; // will do nothing, and obj[0] is not observed
+```
-  ```
-
-  In that case, the solution is the same, we can simply use the `set` method:
-
-  ```javascript
-  observer.set(obj, 0, { id: 2, text: "othertodo" });
-  ```

doc/quick_start.md

@@ -1,6 +1,6 @@
 # 🦉 Quick Start 🦉
 
-## Static server
+## Static Server
 
 Let us assume that we have a static server running somewhere. We could then
 simply add an html page with a few extra files.

doc/qweb.md

@@ -5,15 +5,15 @@
 - [Overview](#overview)
 - [Directives](#directives)
 - [QWeb Engine](#qweb-engine)
-- [Reference](#qweb-specification)
+- [Reference](#reference)
-  - [White spaces](#white-spaces)
+  - [White Spaces](#white-spaces)
-  - [Root nodes](#root-nodes)
+  - [Root Nodes](#root-nodes)
-  - [Expression evaluation](#expression-evaluation)
+  - [Expression Evaluation](#expression-evaluation)
-  - [Static html nodes](#static-html-nodes)
+  - [Static html Nodes](#static-html-nodes)
-  - [Outputting data](#outputting-data)
+  - [Outputting Data](#outputting-data)
   - [Setting Variables](#setting-variables)
   - [Conditionals](#conditionals)
-  - [Dynamic attributes](#dynamic-attributes)
+  - [Dynamic Attributes](#dynamic-attributes)
   - [Loops](#loops)
   - [Rendering Sub Templates](#rendering-sub-templates)
   - [Debugging](#debugging)
@@ -65,14 +65,16 @@ We present here a list of all standard QWeb directives:
 The component system in Owl requires additional directives, to express various
 needs. Here is a list of all Owl specific directives:
 
-| Name                      | Description                                                                             |
+| Name                                         | Description                                                                         |
-| ------------------------- | --------------------------------------------------------------------------------------- |
+| -------------------------------------------- | ----------------------------------------------------------------------------------- |
-| `t-widget`, `t-keepalive` | [Defining a sub component](component.md#composition)                                    |
+| `t-widget`, `t-keepalive`, `t-asyncroot` | [Defining a sub component](component.md#composition)                                |
-| `t-ref`                   | [Setting a reference to a dom node or a sub component](component.md#keeping-references) |
+| `t-ref`                                      | [Setting a reference to a dom node or a sub component](component.md#references)     |
-| `t-key`                   | [Defining a key (to help virtual dom reconciliation)](component.md#t-key-directive)     |
+| `t-key`                                      | [Defining a key (to help virtual dom reconciliation)](component.md#t-key-directive) |
-| `t-on-*`                  | [Event handling](component.md#event-handling)                                           |
+| `t-on-*`                                     | [Event handling](component.md#event-handling)                                       |
-| `t-transition`            | [Defining an animation](animations.md#css-transitions)                                  |
+| `t-transition`                               | [Defining an animation](animations.md#css-transitions)                              |
-| `t-mounted`               | [Callback when a node or component is mounted](#component.md#t-mounted-directive)       |
+| `t-mounted`                                  | [Callback when a node or component is mounted](component.md#t-mounted-directive)    |
+| `t-slot`                                     | [Rendering a slot](component.md#slots)                                              |
+| `t-model`                                    | [Form input bindings](component.md#form-input-bindings)                             |
 
 ## QWeb Engine
 
@@ -139,7 +141,7 @@ We define in this section the specification of how `QWeb` templates should be
 rendered. Note that we only document here the standard QWeb specification. Owl
 specific extensions are documented in various other parts of the documentation.
 
-### White spaces
+### White Spaces
 
 White spaces in a templates are handled in a special way:
 
@@ -147,7 +149,7 @@ White spaces in a templates are handled in a special way:
 - if a whitespace-only text node contains a linebreak, it is ignored
 - the previous rules do not apply if we are in a `<pre>` tag
 
-### Root nodes
+### Root Nodes
 
 For many reasons, Owl QWeb templates should have a single root node. More
 precisely, the result of a template rendering should have a single root node:
@@ -173,11 +175,17 @@ Note: this does not apply to subtemplates (see the `t-call` directive). In that
 case, they will be inlined in the main template, and can actually have many
 root nodes.
 
-### Expression evaluation
+### Expression Evaluation
 
-It is useful to explain the various rules that applies on QWeb expressions. These
+QWeb expressions are strings that will be processed at compile time. Each variable in
-expressions are strings that will be converted to a javascript expression at
+the javascript expression will be replaced by a lookup in the context (so, the
-compile time.
+widget). For example, `a + b.c(d)` will be converted into:
+
+```js
+context["a"] + context["b"].c(context["d"]);
+```
+
+It is useful to explain the various rules that applies on these expressions:
 
 1. it should be a simple expression which returns a value. It cannot be a statement.
 
@@ -191,10 +199,10 @@ compile time.
    <div><p t-if="console.log(1)">NOT valid</p></div>
    ```
 
-2. it can use anything in the rendering context:
+2. it can use anything in the rendering context (typically, the component):
 
    ```xml
-   <p t-if="user.birthday == today()">Happy bithday!</p>
+   <p t-if="user.birthday === today()">Happy bithday!</p>
    ```
 
    is valid, and will read the `user` object from the context, and call the
@@ -337,7 +345,7 @@ Extra conditional branching directives `t-elif` and `t-else` are also available:
 </div>
 ```
 
-### Dynamic attributes
+### Dynamic Attributes
 
 One can use the `t-att-` directive to add dynamic attributes. Its main use is to
 evaluate an expression (at rendering time) and bind an attribute to its result:
@@ -357,13 +365,6 @@ If an expression evaluates to a falsy value, it will not be set at all:
 There is another way to format a string attribute: the `t-attf-` directive. With
 it, you get string interpolation:
 
-```xml
-<div t-attf-foo="a #{value1} is #{value2} of #{value3} ]"/>
-<!-- result if values are set to 1,2 and 3: <div foo="a 0 is 1 of 2 ]"></div> -->
-```
-
-For historical reason, there is an alternate form of string interpolation:
-
 ```xml
 <div t-attf-foo="a {{value1}} is {{value2}} of {{value3}} ]"/>
 <!-- result if values are set to 1,2 and 3: <div foo="a 0 is 1 of 2 ]"></div> -->
@@ -399,9 +400,8 @@ Like conditions, `t-foreach` applies to the element bearing the directive’s at
 
 is equivalent to the previous example.
 
-`t-foreach` can iterate on an array (the current item will be the current value),
+`t-foreach` can iterate on an array (the current item will be the current value)
-an object (the current item will be the current key) or an integer (equivalent
+or an object (the current item will be the current key).
-to iterating on an array between 0 inclusive and the provided integer exclusive).
 
 In addition to the name passed via t-as, `t-foreach` provides a few other
 variables for various data points (note: `$as` will be replaced by the name
@@ -415,8 +415,6 @@ passed to `t-as`):
 - `$as_last`: whether the current item is the last of the iteration
   (equivalent to `$as_index + 1 == $as_size`), requires the iteratee’s size be
   available
-- `$as_parity` (deprecated): either "even" or "odd", the parity of the current
-  iteration round
 
 These extra variables provided and all new variables created into the `t-foreach`
 are only available in the scope of the `t-foreach`. If the variable exists outside
@@ -427,7 +425,7 @@ into the global context.
 <t t-set="existing_variable" t-value="False"/>
 <!-- existing_variable now False -->
 
-<p t-foreach="[1, 2, 3]" t-as="i">
+<p t-foreach="Array(3)" t-as="i">
     <t t-set="existing_variable" t-value="True"/>
     <t t-set="new_variable" t-value="True"/>
     <!-- existing_variable and new_variable now True -->

doc/readme.md

@@ -1,17 +1,21 @@
 # 🦉 OWL Documentation 🦉
 
-
 ## Reference
 
+- [Animations](animations.md)
 - [Component](component.md)
+- [Event Bus](event_bus.md)
+- [Observer](observer.md)
 - [QWeb](qweb.md)
 - [Store](store.md)
-- [Observer](observer.md)
-- [Virtual DOM](vdom.md)
 - [Utils](utils.md)
+- [Virtual DOM](vdom.md)
+
+## Learning Resources
+
+- [Quick Start](quick_start.md)
 
 ## Miscellaneous
-- [Quick Start](quick_start.md)
+
-- [Animations](animations.md)
-- [Tooling](tooling.md)
 - [Comparison with React/Vue](comparison.md)
+- [Tooling](tooling.md)

doc/store.md

@@ -9,7 +9,7 @@
   - [Mutations](#mutations)
   - [Actions](#actions)
   - [Getters](#getters)
-  - [Connecting a component](#connecting-a-component)
+  - [Connecting a Component](#connecting-a-component)
 
 ## Overview
 
@@ -28,50 +28,49 @@ Note: Owl's store is inspired by React Redux and VueX.
 
 ## Example
 
-Here is what a simple store look like:
+Here is what a simple store looks like:
 
 ```js
 const actions = {
-    addTodo({commit}, message) {
+  addTodo({ commit }, message) {
-        commit('addTodo', message);
+    commit("addTodo", message);
-    }
+  }
 };
 
 const mutations = {
-    addTodo({state}, message) {
+  addTodo({ state }, message) {
-        const todo = {
+    const todo = {
-            id: state.nextId++,
+      id: state.nextId++,
-            message,
+      message,
-            isCompleted: false,
+      isCompleted: false
-        };
+    };
-        state.todos.push(todo);
+    state.todos.push(todo);
-    },
+  }
 };
 
 const state = {
-    todos: [],
+  todos: [],
-    nextId: 1,
+  nextId: 1
 };
 
-const store = new owl.Store({state, actions, mutations});
+const store = new owl.Store({ state, actions, mutations });
-store.on('update', () => console.log(store.state));
+store.on("update", () => console.log(store.state));
 
 // updating the state
-store.dispatch('addTodo', 'fix all bugs');
+store.dispatch("addTodo", "fix all bugs");
 ```
 
-
 ## Reference
 
-The store is a simple `owl.EventBus` that triggers `update` events whenever its
+The store is a simple [`owl.EventBus`](event_bus.md) that triggers `update` events whenever its
-state is changed.  Note that these events are triggered only after a microtask
+state is changed. Note that these events are triggered only after a microtask
 tick, so only one event will be triggered for any number of state changes in a
 call stack.
 
-Also, it is important to mention that the state is observed (with a `owl.Observer`),
+Also, it is important to mention that the state is observed (with an `owl.Observer`),
-which is the reason why it is able to know if it was changed.  This implies that
+which is the reason why it is able to know if it was changed. This implies that
 state changes need to be done carefully in some cases (adding a new key to an
-object, or modifying an array with the `arr[i] = newValue` syntax).  See the
+object, or modifying an array with the `arr[i] = newValue` syntax). See the
 [Observer](observer.md)'s documentation for more details.
 
 ### Public API
@@ -82,26 +81,26 @@ object, or modifying an array with the `arr[i] = newValue` syntax).  See the
 
 ### Mutations
 
-Mutations are the only way to modify the state.  Changing the state outside a
+Mutations are the only way to modify the state. Changing the state outside a
-mutation is not allowed (and should throw an error).  Mutations are synchronous.
+mutation is not allowed (and should throw an error). Mutations are synchronous.
 
 ### Actions
 
-Actions are used to coordinate state changes.  It is also useful whenever some
+Actions are used to coordinate state changes. It is also useful whenever some
-asynchronous logic is necessary.  For example, fetching data should be done
+asynchronous logic is necessary. For example, fetching data should be done
 in an action.
 
 ```js
 const actions = {
-    async login({commit}) {
+  async login({ commit }) {
-        commit('setLoginState', 'pending');
+    commit("setLoginState", "pending");
-        try {
+    try {
-            const loginInfo = await doSomeRPC('/login/', 'someinfo');
+      const loginInfo = await doSomeRPC("/login/", "someinfo");
-            commit('setLoginState', loginInfo);
+      commit("setLoginState", loginInfo);
-        } catch {
+    } catch {
-            commit('setLoginState', 'error');
+      commit("setLoginState", "error");
-        }
     }
+  }
 };
 ```
 
@@ -128,22 +127,83 @@ transform the data contained in the store.
 
 ```js
 const getters = {
-    getPost({state}, id) {
+  getPost({ state }, id) {
-        const post = state.posts.find(p => p.id === id);
+    const post = state.posts.find(p => p.id === id);
-        const author = state.authors.find(a => a.id = post.id);
+    const author = state.authors.find(a => (a.id = post.id));
-        return {
+    return {
-            id,
+      id,
-            author,
+      author,
-            content: post.content
+      content: post.content
-        };
+    };
-    },
+  }
 };
 
 // somewhere else
 const post = store.getters.getPost(id);
-
 ```
 
-### Connecting a component
+Getters take *at most* one argument.
 
-Todo
+
+Note that getters are cached if they don't take any argument, or their argument
+is a string or a number.
+
+### Connecting a Component
+
+By default, an Owl `Component` is not connected to any store. The `connect`
+function is there to create sub Components that are connected versions of
+Components.
+
+```javascript
+const actions = {
+  increment({ commit }) {
+    commit("increment", 1);
+  }
+};
+const mutations = {
+  increment({ state }, val) {
+    state.counter += val;
+  }
+};
+const state = {
+  counter: 0
+};
+const store = new owl.Store({ state, actions, mutations });
+
+class Counter extends owl.Component {
+  increment() {
+    this.env.store.dispatch("increment");
+  }
+}
+function mapStoreToProps(state) {
+  return {
+    value: state.counter
+  };
+}
+const ConnectedCounter = owl.connect(Counter, mapStoreToProps);
+
+const counter = new ConnectedCounter({ store, qweb });
+```
+
+```xml
+<button t-name="Counter" t-on-click="increment">
+  Click Me! [<t t-esc="props.value"/>]
+</button>
+```
+
+The arguments of `connect` are:
+
+- `Counter`: an owl `Component` to connect
+- `mapStoreToProps`: a function that extracts the `props` of the Component
+  from the `state` of the `Store` and returns them as a dict
+- `options`: dictionary of optional parameters that may contain
+  - `getStore`: a function that takes the `env` in arguments and returns an
+    instance of `Store` to connect to (if not given, connects to `env.store`)
+  - `hashFunction`: the function to use to detect changes in the state (if not
+    given, generates a function that uses revision numbers, incremented at
+    each state change)
+  - `deep`: [only useful if no hashFunction is given] if false, only watch
+    for top level state changes (true by default)
+
+The `connect` function returns a sub class of the given `Component` which is
+connected to the `store`.

doc/tooling.md

@@ -1,18 +1,55 @@
 # 🦉 Tooling 🦉
 
-## Development mode
+## Content
 
-By default, Owl is in *production* mode, this means that it will try to do its
+- [Overview](#overview)
-job fast, and skip some expensive operations.  However, in some cases, it is
+- [Development Mode](#development-mode)
+- [Playground](#playground)
+- [Benchmarks](#benchmarks)
+
+## Overview
+
+To help work with/improve/learn OWL, there are a few extras tools/settings.
+
+- development mode: enable better error reporting for the developer
+- a playground application: a space to experiment and learn Owl.
+- a benchmarks application: allow comparison with a few common frameworks
+
+The two applications are available in the `tools/` folder, and can be accessed
+by using a static http server. A simple python
+server is available in `server.py`. There is also a npm script to start it:
+`npm run tools` (and its version with a watcher: `npm run tools:watch`).
+
+## Development Mode
+
+By default, Owl is in _production_ mode, this means that it will try to do its
+job fast, and skip some expensive operations. However, in some cases, it is
 convenient to have better information on what is going on, this is the purpose
 of the dev mode.
 
-Owl has a mode flag, in `owl.__info__.mode`.  Its default value is `prod`, but
+Owl has a mode flag, in `owl.__info__.mode`. Its default value is `prod`, but
 it can be set to `dev`:
 
 ```js
-owl.__info__.mode = 'dev';
+owl.__info__.mode = "dev";
 ```
 
 Note that templates compiled with the `prod` settings will not be recompiled.
-So, changing this setting is best done at startup.
+So, changing this setting is best done at startup.
+
+## Playground
+
+The playground is an important application designed to help learning and
+experimenting with Owl. The last published version of Owl can be tested [online](https://odoo.github.io/owl/playground/).
+
+It is an application similar to `jsFiddle`, but specialized for Owl: there are
+three tabs (`js`, `css` and `xml`), and a simple button `Run` to execute that
+code in an iframe.
+
+## Benchmarks
+
+Note: This is more an internal tool, useful for people working on Owl.
+
+The benchmarks application is a very small application, implemented in different
+frameworks, and in different versions of Owl. This is a simple internal tool,
+useful to compare various performance metrics on some tasks.

doc/utils.md

@@ -5,35 +5,61 @@ functions are all available in the `owl.utils` namespace.
 
 ## Content
 
-- [`whenReady`](#whenready)
+- [`whenReady`](#whenready): executing code when DOM is ready
-- [`loadJS`](#loadjs)
+- [`loadJS`](#loadjs): loading script files
-- [`loadTemplates`](#loadtemplates)
+- [`loadTemplates`](#loadtemplates): loading xml files
-- [`escape`](#escape)
+- [`escape`](#escape): sanitizing strings
-- [`debounce`](#debounce)
+- [`debounce`](#debounce): limiting rate of function calls
 
 ## `whenReady`
 
-The function `whenReady` is useful to register some code that need to be executed
+The function `whenReady` returns a `Promise` resolved when the DOM is ready (if
-as soon as the document (page) is ready:
+not ready yet, resolved directly otherwise). If called with a callback as
+argument, it executes it as soon as the DOM ready (or directly).
 
 ```js
-owl.utils.whenReady(function () {
+Promise.all([loadTemplates(), owl.utils.whenReady()]).then(function([
-    const qweb = new owl.QWeb();
+  templates
-    const app = new App({ qweb });
+]) {
-    app.mount(document.body);
+  const qweb = new owl.QWeb(templates);
+  const app = new App({ qweb });
+  app.mount(document.body);
+});
+```
+
+```js
+owl.utils.whenReady(function() {
+  const qweb = new owl.QWeb();
+  const app = new App({ qweb });
+  app.mount(document.body);
 });
 ```
 
 ## `loadJS`
 
+`loadJS` takes a url (string) for a javascript resource, and loads it. It returns
+a promise, so the caller can properly react when it is ready. Also, it is smart:
+it maintains a list of urls previously loaded (or currently being loaded), and
+prevent doing twice the work.
+
+```js
+class MyComponent extends owl.Component {
+  willStart() {
+    return owl.utils.loadJS("/static/libs/someLib.js");
+  }
+}
+```
+
 ## `loadTemplates`
 
+```js
+async function makeEnv() {
+  const templates = await owl.utils.loadTemplates("templates.xml");
+  const qweb = new owl.QWeb(templates);
+  return { qweb };
+}
+```
+
 ## `escape`
 
 ## `debounce`
-
-
-
-
-
-

doc/vdom.md

@@ -1,3 +1,18 @@
 # 🦉 VDom 🦉
 
-Owl's virtual dom is a fork of [snabbdom](https://github.com/snabbdom/snabbdom).
+Owl is a declarative component system: we declare the structure of the component
+tree, and Owl will translate that to a list of imperative operations. This
+translation is done by a virtual dom. This is the low level layer of Owl, most
+developer will not need to call directly the virtual dom functions.
+
+The main idea behind a virtual dom is to keep a in-memory representation of the
+DOM (called a virtual node), and whenever some change is needed, to regenerate
+a new representation, compute the difference between the old and the new, then
+apply the changes.
+
+`vdom` exports two functions:
+
+- `h`: create a new virtual node
+- `patch`: compare two virtual nodes, and apply the difference.
+
+Note: Owl's virtual dom is a fork of [snabbdom](https://github.com/snabbdom/snabbdom).

extras/benchmarks/odoo-widgets-12.0/templates.xml

@@ -1,30 +0,0 @@
-<templates>
-    <div class="main" t-name="root">
-        <div class="left-thing">
-            <div class="message_count">
-                Number of msg: 0
-            </div>
-            <button class="o_btn_msg 100">Add 100 messages</button>
-            <button class="o_btn_msg 1000">Add 1000 messages</button>
-            <button class="o_btn_msg 10000">Add 10000 messages</button>
-            <button class="o_btn_msg 50000">Add 50000 messages</button>
-            <button class="updateSomeMessages">Update every 10th message</button>
-            <button class="clear">Clear</button>
-        </div>
-        <div class="right-thing">
-            <div class="content">
-            </div>
-        </div>
-    </div>
-
-    <div t-name="message" class="message">
-        <span class="author"><t t-esc="widget.author"/></span>
-        <span class="msg"><t t-esc="widget.msg"/></span>
-        <button class="remove" >Remove</button>
-    </div>
-
-  <div t-name="counter">
-    <button class="o_increment"></button>
-  </div>
-
-</templates>

extras/benchmarks/odoo-widgets-12.3/templates.xml

@@ -1,30 +0,0 @@
-<templates>
-    <div class="main" t-name="root">
-        <div class="left-thing">
-            <div class="message_count">
-                Number of msg: 0
-            </div>
-            <button class="o_btn_msg 100">Add 100 messages</button>
-            <button class="o_btn_msg 1000">Add 1000 messages</button>
-            <button class="o_btn_msg 10000">Add 10000 messages</button>
-            <button class="o_btn_msg 50000">Add 50000 messages</button>
-            <button class="updateSomeMessages">Update every 10th message</button>
-            <button class="clear">Clear</button>
-        </div>
-        <div class="right-thing">
-            <div class="content">
-            </div>
-        </div>
-    </div>
-
-    <div t-name="message" class="message">
-        <span class="author"><t t-esc="widget.author"/></span>
-        <span class="msg"><t t-esc="widget.msg"/></span>
-        <button class="remove" >Remove</button>
-    </div>
-
-  <div t-name="counter">
-    <button class="o_increment"></button>
-  </div>
-
-</templates>

extras/benchmarks/owl-0.10.0/app.js

@@ -1,84 +0,0 @@
-import { buildData, startMeasure, stopMeasure } from "../shared/utils.js";
-
-//------------------------------------------------------------------------------
-// Likes Counter Widget
-//------------------------------------------------------------------------------
-class Counter extends owl.Component {
-  template = "counter";
-  state = { counter: 0 };
-
-  increment() {
-    this.state.counter++;
-  }
-}
-
-//------------------------------------------------------------------------------
-// Message Widget
-//------------------------------------------------------------------------------
-class Message extends owl.Component {
-  template = "message";
-  widgets = { Counter };
-
-  shouldUpdate(nextProps) {
-    return nextProps !== this.props;
-  }
-  removeMessage() {
-    this.trigger("remove_message", {
-      id: this.props.id
-    });
-  }
-}
-
-//------------------------------------------------------------------------------
-// Root Widget
-//------------------------------------------------------------------------------
-class App extends owl.Component {
-  template = "root";
-  widgets = { Message };
-  state = { messages: [] };
-
-  addMessages(n) {
-    startMeasure("add " + n);
-    const newMessages = buildData(n);
-    this.state.messages.push.apply(this.state.messages, newMessages);
-    stopMeasure();
-  }
-
-  clear() {
-    startMeasure("clear");
-    this.state.messages = [];
-    stopMeasure();
-  }
-
-  updateSomeMessages() {
-    startMeasure("update every 10th");
-    const messages = this.state.messages;
-    for (let i = 0; i < this.state.messages.length; i += 10) {
-      const msg = Object.assign({}, messages[i]);
-      msg.author += '!!!';
-      this.set(messages, i, msg);
-    }
-    stopMeasure();
-  }
-
-  removeMessage(data) {
-    startMeasure("remove message");
-    const index = this.state.messages.findIndex(m => m.id === data.id);
-    this.state.messages.splice(index, 1);
-    stopMeasure();
-  }
-}
-
-//------------------------------------------------------------------------------
-// Application initialization
-//------------------------------------------------------------------------------
-async function start() {
-  const templates = await owl.utils.loadTemplates("templates.xml");
-  const env = {
-    qweb: new owl.QWeb(templates)
-  };
-  const app = new App(env);
-  app.mount(document.body);
-}
-
-start();

extras/benchmarks/owl-0.10.0/templates.xml

@@ -1,32 +0,0 @@
-<templates>
-  <div t-name="root" class="main">
-      <div class="left-thing">
-          <div>Number of msg: <t t-esc="state.messages.length"/></div>
-          <button t-on-click="addMessages(100)">Add 100 messages</button>
-          <button t-on-click="addMessages(1000)">Add 1000 messages</button>
-          <button t-on-click="addMessages(10000)">Add 10000 messages</button>
-          <button t-on-click="addMessages(50000)">Add 50000 messages</button>
-          <button t-on-click="updateSomeMessages">Update every 10th message</button>
-          <button t-on-click="clear">Clear</button>
-      </div>
-      <div class="right-thing">
-          <div class="content">
-              <t t-foreach="state.messages" t-as="message">
-                  <t t-widget="Message" t-key="message.id" t-props="message" t-on-remove_message="removeMessage"/>
-              </t>
-          </div>
-      </div>
-  </div>
-
-  <div t-name="message" class="message">
-    <span class="author"><t t-esc="props.author"/></span>
-    <span class="msg"><t t-esc="props.msg"/></span>
-    <button class="remove" t-on-click="removeMessage">Remove</button>
-    <t t-widget="Counter"/>
-  </div>
-
-  <div t-name="counter">
-    <button t-on-click="increment">Value: <t t-esc="state.counter"/></button>
-  </div>
-
-</templates>

extras/benchmarks/owl-0.11.0/app.js

@@ -1,84 +0,0 @@
-import { buildData, startMeasure, stopMeasure } from "../shared/utils.js";
-
-//------------------------------------------------------------------------------
-// Likes Counter Widget
-//------------------------------------------------------------------------------
-class Counter extends owl.Component {
-  template = "counter";
-  state = { counter: 0 };
-
-  increment() {
-    this.state.counter++;
-  }
-}
-
-//------------------------------------------------------------------------------
-// Message Widget
-//------------------------------------------------------------------------------
-class Message extends owl.Component {
-  template = "message";
-  widgets = { Counter };
-
-  shouldUpdate(nextProps) {
-    return nextProps !== this.props;
-  }
-  removeMessage() {
-    this.trigger("remove_message", {
-      id: this.props.id
-    });
-  }
-}
-
-//------------------------------------------------------------------------------
-// Root Widget
-//------------------------------------------------------------------------------
-class App extends owl.Component {
-  template = "root";
-  widgets = { Message };
-  state = { messages: [] };
-
-  addMessages(n) {
-    startMeasure("add " + n);
-    const newMessages = buildData(n);
-    this.state.messages.push.apply(this.state.messages, newMessages);
-    stopMeasure();
-  }
-
-  clear() {
-    startMeasure("clear");
-    this.state.messages = [];
-    stopMeasure();
-  }
-
-  updateSomeMessages() {
-    startMeasure("update every 10th");
-    const messages = this.state.messages;
-    for (let i = 0; i < this.state.messages.length; i += 10) {
-      const msg = Object.assign({}, messages[i]);
-      msg.author += '!!!';
-      this.set(messages, i, msg);
-    }
-    stopMeasure();
-  }
-
-  removeMessage(data) {
-    startMeasure("remove message");
-    const index = this.state.messages.findIndex(m => m.id === data.id);
-    this.state.messages.splice(index, 1);
-    stopMeasure();
-  }
-}
-
-//------------------------------------------------------------------------------
-// Application initialization
-//------------------------------------------------------------------------------
-async function start() {
-  const templates = await owl.utils.loadTemplates("templates.xml");
-  const env = {
-    qweb: new owl.QWeb(templates)
-  };
-  const app = new App(env);
-  app.mount(document.body);
-}
-
-start();

extras/benchmarks/owl-0.11.0/templates.xml

@@ -1,32 +0,0 @@
-<templates>
-  <div t-name="root" class="main">
-      <div class="left-thing">
-          <div>Number of msg: <t t-esc="state.messages.length"/></div>
-          <button t-on-click="addMessages(100)">Add 100 messages</button>
-          <button t-on-click="addMessages(1000)">Add 1000 messages</button>
-          <button t-on-click="addMessages(10000)">Add 10000 messages</button>
-          <button t-on-click="addMessages(50000)">Add 50000 messages</button>
-          <button t-on-click="updateSomeMessages">Update every 10th message</button>
-          <button t-on-click="clear">Clear</button>
-      </div>
-      <div class="right-thing">
-          <div class="content">
-              <t t-foreach="state.messages" t-as="message">
-                  <t t-widget="Message" t-key="message.id" t-props="message" t-on-remove_message="removeMessage"/>
-              </t>
-          </div>
-      </div>
-  </div>
-
-  <div t-name="message" class="message">
-    <span class="author"><t t-esc="props.author"/></span>
-    <span class="msg"><t t-esc="props.msg"/></span>
-    <button class="remove" t-on-click="removeMessage">Remove</button>
-    <t t-widget="Counter"/>
-  </div>
-
-  <div t-name="counter">
-    <button t-on-click="increment">Value: <t t-esc="state.counter"/></button>
-  </div>
-
-</templates>

extras/benchmarks/owl-0.12.0/app.js

@@ -1,84 +0,0 @@
-import { buildData, startMeasure, stopMeasure } from "../shared/utils.js";
-
-//------------------------------------------------------------------------------
-// Likes Counter Widget
-//------------------------------------------------------------------------------
-class Counter extends owl.Component {
-  template = "counter";
-  state = { counter: 0 };
-
-  increment() {
-    this.state.counter++;
-  }
-}
-
-//------------------------------------------------------------------------------
-// Message Widget
-//------------------------------------------------------------------------------
-class Message extends owl.Component {
-  template = "message";
-  widgets = { Counter };
-
-  shouldUpdate(nextProps) {
-    return nextProps !== this.props;
-  }
-  removeMessage() {
-    this.trigger("remove_message", {
-      id: this.props.id
-    });
-  }
-}
-
-//------------------------------------------------------------------------------
-// Root Widget
-//------------------------------------------------------------------------------
-class App extends owl.Component {
-  template = "root";
-  widgets = { Message };
-  state = { messages: [] };
-
-  addMessages(n) {
-    startMeasure("add " + n);
-    const newMessages = buildData(n);
-    this.state.messages.push.apply(this.state.messages, newMessages);
-    stopMeasure();
-  }
-
-  clear() {
-    startMeasure("clear");
-    this.state.messages = [];
-    stopMeasure();
-  }
-
-  updateSomeMessages() {
-    startMeasure("update every 10th");
-    const messages = this.state.messages;
-    for (let i = 0; i < this.state.messages.length; i += 10) {
-      const msg = Object.assign({}, messages[i]);
-      msg.author += '!!!';
-      this.set(messages, i, msg);
-    }
-    stopMeasure();
-  }
-
-  removeMessage(data) {
-    startMeasure("remove message");
-    const index = this.state.messages.findIndex(m => m.id === data.id);
-    this.state.messages.splice(index, 1);
-    stopMeasure();
-  }
-}
-
-//------------------------------------------------------------------------------
-// Application initialization
-//------------------------------------------------------------------------------
-async function start() {
-  const templates = await owl.utils.loadTemplates("templates.xml");
-  const env = {
-    qweb: new owl.QWeb(templates)
-  };
-  const app = new App(env);
-  app.mount(document.body);
-}
-
-start();

extras/benchmarks/owl-0.12.0/templates.xml

@@ -1,32 +0,0 @@
-<templates>
-  <div t-name="root" class="main">
-      <div class="left-thing">
-          <div>Number of msg: <t t-esc="state.messages.length"/></div>
-          <button t-on-click="addMessages(100)">Add 100 messages</button>
-          <button t-on-click="addMessages(1000)">Add 1000 messages</button>
-          <button t-on-click="addMessages(10000)">Add 10000 messages</button>
-          <button t-on-click="addMessages(50000)">Add 50000 messages</button>
-          <button t-on-click="updateSomeMessages">Update every 10th message</button>
-          <button t-on-click="clear">Clear</button>
-      </div>
-      <div class="right-thing">
-          <div class="content">
-              <t t-foreach="state.messages" t-as="message">
-                  <t t-widget="Message" t-key="message.id" t-props="message" t-on-remove_message="removeMessage"/>
-              </t>
-          </div>
-      </div>
-  </div>
-
-  <div t-name="message" class="message">
-    <span class="author"><t t-esc="props.author"/></span>
-    <span class="msg"><t t-esc="props.msg"/></span>
-    <button class="remove" t-on-click="removeMessage">Remove</button>
-    <t t-widget="Counter"/>
-  </div>
-
-  <div t-name="counter">
-    <button t-on-click="increment">Value: <t t-esc="state.counter"/></button>
-  </div>
-
-</templates>

extras/benchmarks/owl-0.7.0/app.js

@@ -1,85 +0,0 @@
-import { buildData, startMeasure, stopMeasure } from "../shared/utils.js";
-
-//------------------------------------------------------------------------------
-// Likes Counter Widget
-//------------------------------------------------------------------------------
-class Counter extends owl.Component {
-  template = "counter";
-  state = { counter: 0 };
-
-  increment() {
-    this.state.counter++;
-  }
-}
-
-//------------------------------------------------------------------------------
-// Message Widget
-//------------------------------------------------------------------------------
-class Message extends owl.Component {
-  template = "message";
-  widgets = { Counter };
-
-  shouldUpdate(nextProps) {
-    return nextProps !== this.props;
-  }
-
-  removeMessage() {
-    this.trigger("remove_message", {
-      id: this.props.id
-    });
-  }
-}
-
-//------------------------------------------------------------------------------
-// Root Widget
-//------------------------------------------------------------------------------
-class App extends owl.Component {
-  template = "root";
-  widgets = { Message };
-  state = { messages: [] };
-
-  addMessages(n) {
-    startMeasure("add " + n);
-    const newMessages = buildData(n);
-    this.state.messages.push.apply(this.state.messages, newMessages);
-    stopMeasure();
-  }
-
-  clear() {
-    startMeasure("clear");
-    this.state.messages = [];
-    stopMeasure();
-  }
-
-  updateSomeMessages() {
-    startMeasure("update every 10th");
-    const messages = this.state.messages;
-    for (let i = 0; i < this.state.messages.length; i += 10) {
-      const msg = Object.assign({}, messages[i]);
-      msg.author += '!!!';
-      this.set(messages, i, msg);
-    }
-    stopMeasure();
-  }
-
-  removeMessage(data) {
-    startMeasure('remove message');
-    const index = this.state.messages.findIndex(m => m.id === data.id);
-    this.state.messages.splice(index, 1);
-    stopMeasure();
-  }
-}
-
-//------------------------------------------------------------------------------
-// Application initialization
-//------------------------------------------------------------------------------
-async function start() {
-  const templates = await owl.utils.loadTemplates("templates.xml");
-  const env = {
-    qweb: new owl.QWeb(templates)
-  };
-  const app = new App(env);
-  app.mount(document.body);
-}
-
-start();

extras/benchmarks/owl-0.7.0/templates.xml

@@ -1,32 +0,0 @@
-<templates>
-  <div t-name="root" class="main">
-      <div class="left-thing">
-          <div>Number of msg: <t t-esc="state.messages.length"/></div>
-          <button t-on-click="addMessages(100)">Add 100 messages</button>
-          <button t-on-click="addMessages(1000)">Add 1000 messages</button>
-          <button t-on-click="addMessages(10000)">Add 10000 messages</button>
-          <button t-on-click="addMessages(50000)">Add 50000 messages</button>
-          <button t-on-click="updateSomeMessages">Update every 10th message</button>
-          <button t-on-click="clear">Clear</button>
-      </div>
-      <div class="right-thing">
-          <div class="content">
-              <t t-foreach="state.messages" t-as="message">
-                  <t t-widget="Message" t-key="message.id" t-props="message" t-on-remove_message="removeMessage"/>
-              </t>
-          </div>
-      </div>
-  </div>
-
-  <div t-name="message" class="message">
-    <span class="author"><t t-esc="props.author"/></span>
-    <span class="msg"><t t-esc="props.msg"/></span>
-    <button class="remove" t-on-click="removeMessage">Remove</button>
-    <t t-widget="Counter"/>
-  </div>
-
-  <div t-name="counter">
-    <button t-on-click="increment">Value: <t t-esc="state.counter"/></button>
-  </div>
-
-</templates>

extras/benchmarks/owl-0.8.0/app.js

@@ -1,84 +0,0 @@
-import { buildData, startMeasure, stopMeasure } from "../shared/utils.js";
-
-//------------------------------------------------------------------------------
-// Likes Counter Widget
-//------------------------------------------------------------------------------
-class Counter extends owl.Component {
-  template = "counter";
-  state = { counter: 0 };
-
-  increment() {
-    this.state.counter++;
-  }
-}
-
-//------------------------------------------------------------------------------
-// Message Widget
-//------------------------------------------------------------------------------
-class Message extends owl.Component {
-  template = "message";
-  widgets = { Counter };
-
-  shouldUpdate(nextProps) {
-    return nextProps !== this.props;
-  }
-  removeMessage() {
-    this.trigger("remove_message", {
-      id: this.props.id
-    });
-  }
-}
-
-//------------------------------------------------------------------------------
-// Root Widget
-//------------------------------------------------------------------------------
-class App extends owl.Component {
-  template = "root";
-  widgets = { Message };
-  state = { messages: [] };
-
-  addMessages(n) {
-    startMeasure("add " + n);
-    const newMessages = buildData(n);
-    this.state.messages.push.apply(this.state.messages, newMessages);
-    stopMeasure();
-  }
-
-  clear() {
-    startMeasure("clear");
-    this.state.messages = [];
-    stopMeasure();
-  }
-
-  updateSomeMessages() {
-    startMeasure("update every 10th");
-    const messages = this.state.messages;
-    for (let i = 0; i < this.state.messages.length; i += 10) {
-      const msg = Object.assign({}, messages[i]);
-      msg.author += '!!!';
-      this.set(messages, i, msg);
-    }
-    stopMeasure();
-  }
-
-  removeMessage(data) {
-    startMeasure("remove message");
-    const index = this.state.messages.findIndex(m => m.id === data.id);
-    this.state.messages.splice(index, 1);
-    stopMeasure();
-  }
-}
-
-//------------------------------------------------------------------------------
-// Application initialization
-//------------------------------------------------------------------------------
-async function start() {
-  const templates = await owl.utils.loadTemplates("templates.xml");
-  const env = {
-    qweb: new owl.QWeb(templates)
-  };
-  const app = new App(env);
-  app.mount(document.body);
-}
-
-start();

extras/benchmarks/owl-0.8.0/templates.xml

@@ -1,32 +0,0 @@
-<templates>
-  <div t-name="root" class="main">
-      <div class="left-thing">
-          <div>Number of msg: <t t-esc="state.messages.length"/></div>
-          <button t-on-click="addMessages(100)">Add 100 messages</button>
-          <button t-on-click="addMessages(1000)">Add 1000 messages</button>
-          <button t-on-click="addMessages(10000)">Add 10000 messages</button>
-          <button t-on-click="addMessages(50000)">Add 50000 messages</button>
-          <button t-on-click="updateSomeMessages">Update every 10th message</button>
-          <button t-on-click="clear">Clear</button>
-      </div>
-      <div class="right-thing">
-          <div class="content">
-              <t t-foreach="state.messages" t-as="message">
-                  <t t-widget="Message" t-key="message.id" t-props="message" t-on-remove_message="removeMessage"/>
-              </t>
-          </div>
-      </div>
-  </div>
-
-  <div t-name="message" class="message">
-    <span class="author"><t t-esc="props.author"/></span>
-    <span class="msg"><t t-esc="props.msg"/></span>
-    <button class="remove" t-on-click="removeMessage">Remove</button>
-    <t t-widget="Counter"/>
-  </div>
-
-  <div t-name="counter">
-    <button t-on-click="increment">Value: <t t-esc="state.counter"/></button>
-  </div>
-
-</templates>

extras/benchmarks/owl-0.9.0/app.js

@@ -1,84 +0,0 @@
-import { buildData, startMeasure, stopMeasure } from "../shared/utils.js";
-
-//------------------------------------------------------------------------------
-// Likes Counter Widget
-//------------------------------------------------------------------------------
-class Counter extends owl.Component {
-  template = "counter";
-  state = { counter: 0 };
-
-  increment() {
-    this.state.counter++;
-  }
-}
-
-//------------------------------------------------------------------------------
-// Message Widget
-//------------------------------------------------------------------------------
-class Message extends owl.Component {
-  template = "message";
-  widgets = { Counter };
-
-  shouldUpdate(nextProps) {
-    return nextProps !== this.props;
-  }
-  removeMessage() {
-    this.trigger("remove_message", {
-      id: this.props.id
-    });
-  }
-}
-
-//------------------------------------------------------------------------------
-// Root Widget
-//------------------------------------------------------------------------------
-class App extends owl.Component {
-  template = "root";
-  widgets = { Message };
-  state = { messages: [] };
-
-  addMessages(n) {
-    startMeasure("add " + n);
-    const newMessages = buildData(n);
-    this.state.messages.push.apply(this.state.messages, newMessages);
-    stopMeasure();
-  }
-
-  clear() {
-    startMeasure("clear");
-    this.state.messages = [];
-    stopMeasure();
-  }
-
-  updateSomeMessages() {
-    startMeasure("update every 10th");
-    const messages = this.state.messages;
-    for (let i = 0; i < this.state.messages.length; i += 10) {
-      const msg = Object.assign({}, messages[i]);
-      msg.author += '!!!';
-      this.set(messages, i, msg);
-    }
-    stopMeasure();
-  }
-
-  removeMessage(data) {
-    startMeasure("remove message");
-    const index = this.state.messages.findIndex(m => m.id === data.id);
-    this.state.messages.splice(index, 1);
-    stopMeasure();
-  }
-}
-
-//------------------------------------------------------------------------------
-// Application initialization
-//------------------------------------------------------------------------------
-async function start() {
-  const templates = await owl.utils.loadTemplates("templates.xml");
-  const env = {
-    qweb: new owl.QWeb(templates)
-  };
-  const app = new App(env);
-  app.mount(document.body);
-}
-
-start();

extras/benchmarks/owl-0.9.0/templates.xml

@@ -1,32 +0,0 @@
-<templates>
-  <div t-name="root" class="main">
-      <div class="left-thing">
-          <div>Number of msg: <t t-esc="state.messages.length"/></div>
-          <button t-on-click="addMessages(100)">Add 100 messages</button>
-          <button t-on-click="addMessages(1000)">Add 1000 messages</button>
-          <button t-on-click="addMessages(10000)">Add 10000 messages</button>
-          <button t-on-click="addMessages(50000)">Add 50000 messages</button>
-          <button t-on-click="updateSomeMessages">Update every 10th message</button>
-          <button t-on-click="clear">Clear</button>
-      </div>
-      <div class="right-thing">
-          <div class="content">
-              <t t-foreach="state.messages" t-as="message">
-                  <t t-widget="Message" t-key="message.id" t-props="message" t-on-remove_message="removeMessage"/>
-              </t>
-          </div>
-      </div>
-  </div>
-
-  <div t-name="message" class="message">
-    <span class="author"><t t-esc="props.author"/></span>
-    <span class="msg"><t t-esc="props.msg"/></span>
-    <button class="remove" t-on-click="removeMessage">Remove</button>
-    <t t-widget="Counter"/>
-  </div>
-
-  <div t-name="counter">
-    <button t-on-click="increment">Value: <t t-esc="state.counter"/></button>
-  </div>
-
-</templates>

extras/benchmarks/owl-master/app.js

@@ -1,81 +0,0 @@
-import { buildData, startMeasure, stopMeasure } from "../shared/utils.js";
-
-//------------------------------------------------------------------------------
-// Likes Counter Widget
-//------------------------------------------------------------------------------
-class Counter extends owl.Component {
-  state = { counter: 0 };
-
-  increment() {
-    this.state.counter++;
-  }
-}
-
-//------------------------------------------------------------------------------
-// Message Widget
-//------------------------------------------------------------------------------
-class Message extends owl.Component {
-  widgets = { Counter };
-
-  shouldUpdate(nextProps) {
-    return nextProps !== this.props;
-  }
-  removeMessage() {
-    this.trigger("remove_message", {
-      id: this.props.id
-    });
-  }
-}
-
-//------------------------------------------------------------------------------
-// Root Widget
-//------------------------------------------------------------------------------
-class App extends owl.Component {
-  widgets = { Message };
-  state = { messages: [] };
-
-  addMessages(n) {
-    startMeasure("add " + n);
-    const newMessages = buildData(n);
-    this.state.messages.push.apply(this.state.messages, newMessages);
-    stopMeasure();
-  }
-
-  clear() {
-    startMeasure("clear");
-    this.state.messages = [];
-    stopMeasure();
-  }
-
-  updateSomeMessages() {
-    startMeasure("update every 10th");
-    const messages = this.state.messages;
-    for (let i = 0; i < this.state.messages.length; i += 10) {
-      const msg = Object.assign({}, messages[i]);
-      msg.author += '!!!';
-      this.set(messages, i, msg);
-    }
-    stopMeasure();
-  }
-
-  removeMessage(data) {
-    startMeasure("remove message");
-    const index = this.state.messages.findIndex(m => m.id === data.id);
-    this.state.messages.splice(index, 1);
-    stopMeasure();
-  }
-}
-
-//------------------------------------------------------------------------------
-// Application initialization
-//------------------------------------------------------------------------------
-async function start() {
-  const templates = await owl.utils.loadTemplates("templates.xml");
-  const env = {
-    qweb: new owl.QWeb(templates)
-  };
-  const app = new App(env);
-  app.mount(document.body);
-}
-
-start();

extras/benchmarks/owl-master/templates.xml

@@ -1,32 +0,0 @@
-<templates>
-  <div t-name="App" class="main">
-      <div class="left-thing">
-          <div>Number of msg: <t t-esc="state.messages.length"/></div>
-          <button t-on-click="addMessages(100)">Add 100 messages</button>
-          <button t-on-click="addMessages(1000)">Add 1000 messages</button>
-          <button t-on-click="addMessages(10000)">Add 10000 messages</button>
-          <button t-on-click="addMessages(50000)">Add 50000 messages</button>
-          <button t-on-click="updateSomeMessages">Update every 10th message</button>
-          <button t-on-click="clear">Clear</button>
-      </div>
-      <div class="right-thing">
-          <div class="content">
-              <t t-foreach="state.messages" t-as="message">
-                  <t t-widget="Message" t-key="message.id" message="message" t-on-remove_message="removeMessage"/>
-              </t>
-          </div>
-      </div>
-  </div>
-
-  <div t-name="Message" class="message">
-    <span class="author"><t t-esc="props.author"/></span>
-    <span class="msg"><t t-esc="props.msg"/></span>
-    <button class="remove" t-on-click="removeMessage">Remove</button>
-    <t t-widget="Counter"/>
-  </div>
-
-  <div t-name="Counter">
-    <button t-on-click="increment">Value: <t t-esc="state.counter"/></button>
-  </div>
-
-</templates>

extras/benchmarks/react/app.js

@@ -1,221 +0,0 @@
-import { buildData, startMeasure, stopMeasure } from "../shared/utils.js";
-
-//------------------------------------------------------------------------------
-// Counter Widget
-//------------------------------------------------------------------------------
-class Counter extends React.Component {
-  constructor(props) {
-    super(props);
-    this.state = {
-      counter: 0
-    };
-    this.increment = this.increment.bind(this);
-  }
-
-  render() {
-    return React.createElement(
-      "div",
-      null,
-      React.createElement(
-        "button",
-        {
-          onClick: this.increment
-        },
-        "Value: ",
-        this.state.counter
-      )
-    );
-  }
-
-  increment() {
-    this.setState({
-      counter: this.state.counter + 1
-    });
-  }
-}
-//------------------------------------------------------------------------------
-// Message Widget
-//------------------------------------------------------------------------------
-class Message extends React.Component {
-  constructor(props) {
-    super(props);
-    this.removeMessage = this.removeMessage.bind(this);
-  }
-
-  render() {
-    return React.createElement(
-      "div",
-      {
-        className: "message"
-      },
-      React.createElement(
-        "span",
-        {
-          className: "author"
-        },
-        this.props.message.author
-      ),
-      React.createElement(
-        "span",
-        {
-          className: "msg"
-        },
-        this.props.message.msg
-      ),
-      React.createElement(
-        "button",
-        {
-          className: "remove",
-          onClick: this.removeMessage
-        },
-        "Remove"
-      ),
-      React.createElement(Counter, null)
-    );
-  }
-
-  removeMessage() {
-    this.props.removeCB(this.props.message.id);
-  }
-}
-
-//------------------------------------------------------------------------------
-// Root Widget
-//------------------------------------------------------------------------------
-class Main extends React.Component {
-  constructor(props) {
-    super(props);
-    this.state = {
-      messages: []
-    };
-    this.removeMessage = this.removeMessage.bind(this);
-  }
-
-  render() {
-    const msgList = this.state.messages.map(m =>
-      React.createElement(Message, {
-        key: m.id,
-        message: m,
-        removeCB: this.removeMessage
-      })
-    );
-    return React.createElement(
-      "div",
-      {
-        className: "main"
-      },
-      React.createElement(
-        "div",
-        {
-          className: "left-thing"
-        },
-        React.createElement(
-          "div",
-          null,
-          "Number of msg: ",
-          this.state.messages.length
-        ),
-        React.createElement(
-          "button",
-          {
-            onClick: _ => this.addMessages(100)
-          },
-          "Add 100 messages"
-        ),
-        React.createElement(
-          "button",
-          {
-            onClick: _ => this.addMessages(1000)
-          },
-          "Add 1000 messages"
-        ),
-        React.createElement(
-          "button",
-          {
-            onClick: _ => this.addMessages(10000)
-          },
-          "Add 10000 messages"
-        ),
-        React.createElement(
-          "button",
-          {
-            onClick: _ => this.addMessages(50000)
-          },
-          "Add 50000 messages"
-        ),
-        React.createElement(
-          "button",
-          {
-            onClick: _ => this.updateSomeMessages()
-          },
-          "Update every 10th messags"
-        ),
-        React.createElement(
-          "button",
-          {
-            onClick: _ => this.clear()
-          },
-          "Clear"
-        )
-      ),
-      React.createElement(
-        "div",
-        {
-          className: "right-thing"
-        },
-        React.createElement(
-          "div",
-          {
-            className: "content"
-          },
-          msgList
-        )
-      )
-    );
-  }
-
-  addMessages(n) {
-    startMeasure("add " + n);
-    const newMessages = this.state.messages.concat(buildData(n));
-    this.setState({
-      messages: newMessages
-    });
-    stopMeasure();
-  }
-
-  clear() {
-    startMeasure("clear");
-    this.setState({
-      messages: []
-    });
-    stopMeasure();
-  }
-
-  updateSomeMessages() {
-    startMeasure("update every 10th");
-    const messages = this.state.messages;
-    for (let i = 0; i < messages.length; i += 10) {
-      messages[i].author += "!!!";
-    }
-    this.forceUpdate();
-    stopMeasure();
-  }
-
-  removeMessage(id) {
-    startMeasure("remove message");
-    const index = this.state.messages.findIndex(m => m.id === id);
-    const messages = this.state.messages.slice();
-    messages.splice(index, 1);
-    this.setState({
-      messages
-    });
-    stopMeasure();
-  }
-} //-----------------------------
-// INIT
-//-----------------------------
-
-ReactDOM.render(
-  React.createElement(Main, null),
-  document.getElementById("main")
-);

extras/benchmarks/shared/main.css

@@ -1,42 +0,0 @@
-.main {
-  position: absolute;
-  left: 0;
-  right: 0;
-  top: 0;
-  bottom: 0;
-
-  display: grid;
-  grid-template-columns: 220px 1fr;
-}
-
-.left-thing {
-  background-color: gray;
-  padding: 20px;
-  color: white;
-}
-
-.left-thing button {
-  width: 100%;
-}
-
-.right-thing {
-  padding: 20px;
-  overflow: auto;
-}
-
-/* Message widget */
-.message .author {
-  font-weight: bold;
-}
-
-.message {
-  width: 400px;
-  background-color: lightblue;
-  margin: 10px 5px;
-  border-radius: 5px;
-  padding: 5px;
-}
-
-.remove {
-  float: right;
-}

extras/benchmarks/vue/app.js

@@ -1,106 +0,0 @@
-import { buildData, startMeasure, stopMeasure } from "../shared/utils.js";
-
-//------------------------------------------------------------------------------
-// Counter Widget
-//------------------------------------------------------------------------------
-Vue.component("likes-counter", {
-  data: function() {
-    return {
-      counter: 0
-    };
-  },
-  methods: {
-    increment() {
-      this.counter++;
-    }
-  },
-  template: `
-    <div>
-      <button @click="increment">Value: {{counter}}</button>
-    </div>`
-});
-
-//------------------------------------------------------------------------------
-// Message Widget
-//------------------------------------------------------------------------------
-Vue.component("my-message", {
-  props: ["msg"],
-  methods: {
-    removeMessage() {
-      this.$emit("removeMessage", this.msg.id);
-    }
-  },
-  template: `
-    <div class="message">
-        <span class="author">{{msg.author}}</span>
-        <span class="msg">{{msg.msg}}</span>
-        <button class="remove" @click="removeMessage">Remove</button>
-        <likes-counter></likes-counter>
-    </div>`
-});
-
-//------------------------------------------------------------------------------
-// Root Widget
-//------------------------------------------------------------------------------
-const App = {
-  name: "App",
-  data() {
-    return { messages: [] };
-  },
-  methods: {
-    addMessages(n) {
-      startMeasure("add " + n);
-      const newMessages = buildData(n);
-      this.messages.push.apply(this.messages, newMessages);
-      stopMeasure();
-    },
-
-    clear() {
-      startMeasure("clear");
-      this.messages = [];
-      stopMeasure();
-    },
-
-    updateSomeMessages() {
-      startMeasure("update every 10th");
-      const messages = this.messages;
-      for (let i = 0; i < this.messages.length; i += 10) {
-        messages[i].author += "!!!";
-      }
-      stopMeasure();
-    },
-
-    removeMessage(id) {
-      startMeasure("remove message");
-      const index = this.messages.findIndex(m => m.id === id);
-      this.messages.splice(index, 1);
-      stopMeasure();
-    }
-  },
-  template: `
-    <div class="main">
-        <div class="left-thing">
-            <div>Number of msg: {{messages.length}}</div>
-            <button @click="addMessages(100)">Add 100 messages</button>
-            <button @click="addMessages(1000)">Add 1000 messages</button>
-            <button @click="addMessages(10000)">Add 10000 messages</button>
-            <button @click="addMessages(50000)">Add 50000 messages</button>
-            <button @click="updateSomeMessages">Update every 10th message</button>
-            <button @click="clear">Clear</button>
-        </div>
-        <div class="right-thing">
-            <div class="content">
-                <my-message v-for="msg in messages" v-bind:key="msg.id" v-bind:msg="msg" @removeMessage="removeMessage"></my-message>
-            </div>
-        </div>
-    </div>
-  `
-};
-
-//------------------------------------------------------------------------------
-// Application initialization
-//------------------------------------------------------------------------------
-
-new Vue({
-  render: h => h(App)
-}).$mount(`#main`);

extras/readme.md

@@ -1,21 +0,0 @@
-# 🦉 Extra Stuff 🦉
-
-To help work/improve/learn with OWL, we have here:
-
-- a benchmarks application
-- a playground application
-
-Both of them can be accessed by using a static http server.  A simple python
-server is available in `server.py`.  There is also a npm script to start it:
-`npm run extras` (and its version with a watcher: `npm run extras:watch`).
-
-## Benchmarks
-
-The benchmarks application is a very small application, implemented in different
-frameworks, and in different versions of Owl.  This is a simple internal tool,
-useful to compare various performance metrics on some tasks.
-
-## Playground
-
-The playground is an important application designed to help learning and
-experimenting with Owl.  It is available [online](https://odoo.github.io/owl/playground/).

package.json

@@ -1,6 +1,6 @@
 {
   "name": "owl",
-  "version": "0.13.0",
+  "version": "0.15.0",
   "description": "Odoo Web Library (OWL)",
   "main": "src/index.ts",
   "scripts": {
@@ -10,10 +10,10 @@
     "minify": "uglifyjs dist/owl.js -o dist/owl.min.js --compress --mangle",
     "test": "jest",
     "test:watch": "jest --watch",
-    "extras:serve": "python3 extras/server.py || python extras/server.py",
+    "tools:serve": "python3 tools/server.py || python tools/server.py",
-    "extras": "npm run build && npm run extras:serve",
+    "tools": "npm run build && npm run tools:serve",
-    "preextras:watch": "npm run build",
+    "pretools:watch": "npm run build",
-    "extras:watch": "npm-run-all  --parallel extras:serve \"build:* -- --watch\""
+    "tools:watch": "npm-run-all  --parallel tools:serve \"build:* -- --watch\""
   },
   "repository": {
     "type": "git",

src/component.ts

@@ -274,20 +274,7 @@ export class Component<T extends Env, Props extends {}, State extends {}> {
     if (shouldPatch && __owl__.isMounted && renderId === __owl__.renderId) {
       // we only update the vnode and the actual DOM if no other rendering
       // occurred between now and when the render method was initially called.
-      const patchLen = patchQueue!.length;
+      this._applyPatchQueue(<any[]>patchQueue);
-      for (let i = 0; i < patchLen; i++) {
-        const patch = patchQueue![i];
-        patch.push(patch[0].willPatch());
-      }
-      for (let i = 0; i < patchLen; i++) {
-        const patch = patchQueue![i];
-        patch[0]._patch(patch[1]);
-      }
-
-      for (let i = patchLen - 1; i >= 0; i--) {
-        const patch = patchQueue![i];
-        patch[0].patched(patch[2]);
-      }
     }
   }
 
@@ -340,14 +327,6 @@ export class Component<T extends Env, Props extends {}, State extends {}> {
     }
   }
 
-  /**
-   * Sets a key (from the state) to a specific value.  This is mostly useful to
-   * work around the limitation in observed value with new keys.
-   */
-  set(target: any, key: string | number, value: any) {
-    this.__owl__.observer!.set(target, key, value);
-  }
-
   /**
    * Emit a custom event of type 'eventType' with the given 'payload' on the
    * component's el, if it exists. However, note that the event will only bubble
@@ -479,7 +458,9 @@ export class Component<T extends Env, Props extends {}, State extends {}> {
           p = p.__proto__;
         }
         if (p === Component) {
-          this.template = "default";
+          throw new Error(
+            `Could not find template for component "${this.constructor.name}"`
+          );
         } else {
           tmap[name] = template;
           this.template = template;
@@ -576,6 +557,29 @@ export class Component<T extends Env, Props extends {}, State extends {}> {
     return <Props>props;
   }
 
+  /**
+   * Apply the given patch queue. A patch is a pair [c, vn], where c is a
+   * Component instance and vn a VNode.
+   *   1) Call 'willPatch' on the component of each patch
+   *   2) Call '_patch' on the component of each patch
+   *   3) Call 'patched' on the component of each patch, in inverse order
+   */
+  _applyPatchQueue(patchQueue: any[]) {
+    const patchLen = patchQueue.length;
+    for (let i = 0; i < patchLen; i++) {
+      const patch = patchQueue[i];
+      patch.push(patch[0].willPatch());
+    }
+    for (let i = 0; i < patchLen; i++) {
+      const patch = patchQueue[i];
+      patch[0]._patch(patch[1]);
+    }
+    for (let i = patchLen - 1; i >= 0; i--) {
+      const patch = patchQueue[i];
+      patch[0].patched(patch[2]);
+    }
+  }
+
   /**
    * Validate the component props (or next props) against the (static) props
    * description.  This is potentially an expensive operation: it may needs to

src/observer.ts

@@ -76,6 +76,24 @@ export class Observer {
   allowMutations: boolean = true;
   dirty: boolean = false;
 
+  static set(target: any, key: number | string, value: any) {
+    if (!target.__owl__) {
+      throw Error(
+        "`Observer.set()` can only be called with observed Objects or Arrays"
+      );
+    }
+    target.__owl__.observer.set(target, key, value);
+  }
+
+  static delete(target: any, key: number | string) {
+    if (!target.__owl__) {
+      throw Error(
+        "`Observer.delete()` can only be called with observed Objects"
+      );
+    }
+    target.__owl__.observer.delete(target, key);
+  }
+
   notifyCB() {}
   notifyChange() {
     this.dirty = true;
@@ -120,8 +138,19 @@ export class Observer {
     this.notifyChange();
   }
 
+  delete(target: any, key: number | string) {
+    delete target[key];
+    this._updateRevNumber(target);
+    this.notifyChange();
+  }
+
   _observeObj<T extends { __owl__?: any }>(obj: T, parent?: any) {
-    obj.__owl__ = { rev: this.rev, deepRev: this.rev, parent };
+    obj.__owl__ = {
+      rev: this.rev,
+      deepRev: this.rev,
+      parent,
+      observer: this
+    };
     Object.defineProperty(obj, "__owl__", { enumerable: false });
     for (let key in obj) {
       this._addProp(obj, key, obj[key]);
@@ -129,7 +158,12 @@ export class Observer {
   }
 
   _observeArr(arr: Array<any>, parent?: any) {
-    (<any>arr).__owl__ = { rev: this.rev, deepRev: this.rev, parent };
+    (<any>arr).__owl__ = {
+      rev: this.rev,
+      deepRev: this.rev,
+      parent,
+      observer: this
+    };
     Object.defineProperty(arr, "__owl__", { enumerable: false });
     (<any>arr).__proto__ = Object.create(ModifiedArrayProto);
     (<any>arr).__proto__.__observer__ = this;
@@ -145,6 +179,7 @@ export class Observer {
   ) {
     var self = this;
     Object.defineProperty(obj, key, {
+      configurable: true,
       enumerable: true,
       get() {
         return value;

src/qweb_core.ts

@@ -1,4 +1,5 @@
 import { VNode, h } from "./vdom";
+import { QWebVar, compileExpr } from "./qweb_expressions";
 
 /**
  * Owl QWeb Engine
@@ -56,18 +57,6 @@ export interface Directive {
 //------------------------------------------------------------------------------
 // Const/global stuff/helpers
 //------------------------------------------------------------------------------
-const RESERVED_WORDS = "true,false,NaN,null,undefined,debugger,console,window,in,instanceof,new,function,return,this,typeof,eval,void,Math,RegExp,Array,Object,Date".split(
-  ","
-);
-
-const WORD_REPLACEMENT = {
-  and: "&&",
-  or: "||",
-  gt: ">",
-  gte: ">=",
-  lt: "<",
-  lte: "<="
-};
 
 const DISABLED_TAGS = [
   "input",
@@ -151,11 +140,15 @@ export class QWeb {
   // able to map a qweb instance to a template name.
   id = nextID++;
 
+  // slots contains sub templates defined with t-set inside t-widget nodes, and
+  // are meant to be used by the t-slot directive.
+  slots = {};
+  nextSlotId = 1;
+
   constructor(data?: string) {
     if (data) {
       this.addTemplates(data);
     }
-    this.addTemplate("default", "<div></div>");
   }
 
   static addDirective(directive: Directive) {
@@ -340,13 +333,15 @@ export class QWeb {
       }
       if (ctx.parentNode) {
         ctx.addLine(`c${ctx.parentNode}.push({text: \`${text}\`});`);
+      } else if (ctx.parentTextNode) {
+        ctx.addLine(`vn${ctx.parentTextNode}.text += \`${text}\`;`);
       } else {
         // this is an unusual situation: this text node is the result of the
         // template rendering.
         let nodeID = ctx.generateID();
         ctx.addLine(`var vn${nodeID} = {text: \`${text}\`};`);
         ctx.rootContext.rootNode = nodeID;
-        ctx.rootContext.parentNode = nodeID;
+        ctx.rootContext.parentTextNode = nodeID;
       }
       return;
     }
@@ -366,7 +361,7 @@ export class QWeb {
     for (let i = 0; i < attributes.length; i++) {
       let attrName = attributes[i].name;
       if (attrName.startsWith("t-")) {
-        let dName = attrName.slice(2).split("-")[0];
+        let dName = attrName.slice(2).split(/-|\./)[0];
         if (!(dName in DIRECTIVE_NAMES)) {
           throw new Error(`Unknown QWeb directive: '${attrName}'`);
         }
@@ -383,12 +378,13 @@ export class QWeb {
         const name = attributes[j].name;
         if (
           name === "t-" + directive.name ||
-          name.startsWith("t-" + directive.name + "-")
+          name.startsWith("t-" + directive.name + "-") ||
+          name.startsWith("t-" + directive.name + ".")
         ) {
           fullName = name;
           value = attributes[j].textContent;
           validDirectives.push({ directive, value, fullName });
-          if (directive.name === "on") {
+          if (directive.name === "on" || directive.name === 'model') {
             withHandlers = true;
           }
         }
@@ -518,7 +514,8 @@ export class QWeb {
       // dynamic attributes
       if (name.startsWith("t-att-")) {
         let attName = name.slice(6);
-        let formattedValue = ctx.formatExpression(ctx.getValue(value!));
+        const v = ctx.getValue(value);
+        let formattedValue = v.id || ctx.formatExpression(v);
         if (
           formattedValue[0] === "{" &&
           formattedValue[formattedValue.length - 1] === "}"
@@ -623,13 +620,14 @@ export class QWeb {
 //------------------------------------------------------------------------------
 // Compilation Context
 //------------------------------------------------------------------------------
+
 export class Context {
   nextID: number = 1;
   code: string[] = [];
-  variables: { [key: string]: any } = {};
+  variables: { [key: string]: QWebVar } = {};
-  definedVariables: { [key: string]: string } = {};
   escaping: boolean = false;
   parentNode: number | null = null;
+  parentTextNode: number | null = null;
   rootNode: number | null = null;
   indentLevel: number = 0;
   rootContext: Context;
@@ -654,7 +652,7 @@ export class Context {
   }
 
   withParent(node: number): Context {
-    if (this === this.rootContext && this.parentNode) {
+    if (this === this.rootContext && (this.parentNode || this.parentTextNode)) {
       throw new Error("A template should not have more than one root node");
     }
     if (!this.rootContext.rootNode) {
@@ -702,66 +700,14 @@ export class Context {
     return val in this.variables ? this.getValue(this.variables[val]) : val;
   }
 
-  formatExpression(e: string): string {
+  /**
-    e = e.trim();
+   * Prepare an expression for being consumed at render time.  Its main job
-    if (e[0] === "{" && e[e.length - 1] === "}") {
+   * is to
-      const innerExpr = e
+   * - replace unknown variables by a lookup in the context
-        .slice(1, -1)
+   * - replace already defined variables by their internal name
-        .split(",")
+   */
-        .map(p => {
+  formatExpression(expr: string): string {
-          let [key, val] = p.trim().split(":");
+    return compileExpr(expr, this.variables);
-          if (key === "") {
-            return "";
-          }
-          if (!val) {
-            val = key;
-          }
-          return `${key}: ${this.formatExpression(val)}`;
-        })
-        .join(",");
-      return "{" + innerExpr + "}";
-    }
-
-    // Thanks CHM for this code...
-    const chars = e.split("");
-    let instring = "";
-    let invar = "";
-    let invarPos = 0;
-    let r = "";
-    chars.push(" ");
-    for (let i = 0, ilen = chars.length; i < ilen; i++) {
-      let c = chars[i];
-      if (instring.length) {
-        if (c === instring && chars[i - 1] !== "\\") {
-          instring = "";
-        }
-      } else if (c === '"' || c === "'") {
-        instring = c;
-      } else if (c.match(/[a-zA-Z_\$]/) && !invar.length) {
-        invar = c;
-        invarPos = i;
-        continue;
-      } else if (c.match(/\W/) && invar.length) {
-        // TODO: Should check for possible spaces before dot
-        if (chars[invarPos - 1] !== "." && RESERVED_WORDS.indexOf(invar) < 0) {
-          if (!(invar in this.definedVariables)) {
-            invar =
-              WORD_REPLACEMENT[invar] ||
-              (invar in this.variables &&
-                this.formatExpression(this.variables[invar])) ||
-              "context['" + invar + "']";
-          }
-        }
-        r += invar;
-        invar = "";
-      } else if (invar.length) {
-        invar += c;
-        continue;
-      }
-      r += c;
-    }
-    const result = r.slice(0, -1);
-    return result;
   }
 
   /**
@@ -777,15 +723,11 @@ export class Context {
     if (matches && matches[0].length === s.length) {
       return `(${this.formatExpression(s.slice(2, -2))})`;
     }
-    matches = s.match(/\#\{.*?\}/g);
-    if (matches && matches[0].length === s.length) {
-      return `(${this.formatExpression(s.slice(2, -1))})`;
-    }
 
-    let formatter = expr => "${" + this.formatExpression(expr) + "}";
+    let r = s.replace(
-    let r = s
+      /\{\{.*?\}\}/g,
-      .replace(/\{\{.*?\}\}/g, s => formatter(s.slice(2, -2)))
+      s => "${" + this.formatExpression(s.slice(2, -2)) + "}"
-      .replace(/\#\{.*?\}/g, s => formatter(s.slice(2, -1)));
+    );
     return "`" + r + "`";
   }
 }

src/qweb_directives.ts

@@ -1,4 +1,5 @@
 import { Context, QWeb, UTILS } from "./qweb_core";
+import { QWebExprVar } from "./qweb_expressions";
 
 /**
  * Owl QWeb Directives
@@ -14,7 +15,6 @@ import { Context, QWeb, UTILS } from "./qweb_core";
  * - t-log
  */
 
-
 //------------------------------------------------------------------------------
 // t-esc and t-raw
 //------------------------------------------------------------------------------
@@ -30,42 +30,49 @@ function compileValueNode(value: any, node: Element, qweb: QWeb, ctx: Context) {
     return;
   }
 
-  if (typeof value === "string") {
+  if (value.xml instanceof NodeList) {
-    let exprID = value;
+    for (let node of Array.from(value.xml)) {
-    if (!(value in ctx.definedVariables)) {
-      exprID = `_${ctx.generateID()}`;
-      ctx.addLine(`var ${exprID} = ${ctx.formatExpression(value)};`);
-    }
-    ctx.addIf(`${exprID} || ${exprID} === 0`);
-    if (!ctx.parentNode) {
-      throw new Error("Should not have a text node without a parent");
-    }
-    if (ctx.escaping) {
-      ctx.addLine(`c${ctx.parentNode}.push({text: ${exprID}});`);
-    } else {
-      let fragID = ctx.generateID();
-      ctx.addLine(`var frag${fragID} = this.utils.getFragment(${exprID})`);
-      let tempNodeID = ctx.generateID();
-      ctx.addLine(`var p${tempNodeID} = {hook: {`);
-      ctx.addLine(
-        `  insert: n => n.elm.parentNode.replaceChild(frag${fragID}, n.elm),`
-      );
-      ctx.addLine(`}};`);
-      ctx.addLine(`var vn${tempNodeID} = h('div', p${tempNodeID})`);
-      ctx.addLine(`c${ctx.parentNode}.push(vn${tempNodeID});`);
-    }
-    if (node.childNodes.length) {
-      ctx.addElse();
-      qweb._compileChildren(node, ctx);
-    }
-    ctx.closeIf();
-    return;
-  }
-  if (value instanceof NodeList) {
-    for (let node of Array.from(value)) {
       qweb._compileNode(<ChildNode>node, ctx);
     }
+    return;
   }
+  let exprID: string;
+  if (typeof value === "string") {
+    exprID = `_${ctx.generateID()}`;
+    ctx.addLine(`var ${exprID} = ${ctx.formatExpression(value)};`);
+  } else {
+    exprID = value.id;
+  }
+  ctx.addIf(`${exprID} || ${exprID} === 0`);
+  if (ctx.escaping) {
+    if (ctx.parentTextNode) {
+      ctx.addLine(`vn${ctx.parentTextNode}.text += ${exprID};`);
+    } else if (ctx.parentNode) {
+      ctx.addLine(`c${ctx.parentNode}.push({text: ${exprID}});`);
+    } else {
+      let nodeID = ctx.generateID();
+      ctx.rootContext.rootNode = nodeID;
+      ctx.rootContext.parentTextNode = nodeID;
+      ctx.addLine(`var vn${nodeID} = {text: ${exprID}};`);
+    }
+  } else {
+    let fragID = ctx.generateID();
+    ctx.addLine(`var frag${fragID} = this.utils.getFragment(${exprID})`);
+    let tempNodeID = ctx.generateID();
+    ctx.addLine(`var p${tempNodeID} = {hook: {`);
+    ctx.addLine(
+      `  insert: n => n.elm.parentNode.replaceChild(frag${fragID}, n.elm),`
+    );
+    ctx.addLine(`}};`);
+    ctx.addLine(`var vn${tempNodeID} = h('div', p${tempNodeID})`);
+    ctx.addLine(`c${ctx.parentNode}.push(vn${tempNodeID});`);
+  }
+  if (node.childNodes.length) {
+    ctx.addElse();
+    qweb._compileChildren(node, ctx);
+  }
+
+  ctx.closeIf();
 }
 
 QWeb.addDirective({
@@ -109,15 +116,21 @@ QWeb.addDirective({
     if (value) {
       const formattedValue = ctx.formatExpression(value);
       if (ctx.variables.hasOwnProperty(variable)) {
-        ctx.addLine(`${ctx.variables[variable]} = ${formattedValue}`);
+        ctx.addLine(
+          `${(<QWebExprVar>ctx.variables[variable]).id} = ${formattedValue}`
+        );
       } else {
         const varName = `_${ctx.generateID()}`;
         ctx.addLine(`var ${varName} = ${formattedValue};`);
-        ctx.definedVariables[varName] = formattedValue;
+        ctx.variables[variable] = {
-        ctx.variables[variable] = varName;
+          id: varName,
+          expr: formattedValue
+        };
       }
     } else {
-      ctx.variables[variable] = node.childNodes;
+      ctx.variables[variable] = {
+        xml: node.childNodes
+      };
     }
     return true;
   }
@@ -189,30 +202,27 @@ QWeb.addDirective({
     tempCtx.nextID = ctx.rootContext.nextID;
     qweb._compileNode(nodeCopy, tempCtx);
     const vars = Object.assign({}, ctx.variables, tempCtx.variables);
-    var definedVariables = Object.assign(
-      {},
-      ctx.definedVariables,
-      tempCtx.definedVariables
-    );
     ctx.rootContext.nextID = tempCtx.nextID;
 
     // open new scope, if necessary
-    const hasNewVariables = Object.keys(definedVariables).length > 0;
+    const hasNewVariables = Object.keys(tempCtx.variables).length > 0;
     if (hasNewVariables) {
       ctx.addLine("{");
       ctx.indent();
-    }
+      // add new variables, if any
-
+      for (let key in tempCtx.variables) {
-    // add new variables, if any
+        const v = tempCtx.variables[key];
-    for (let key in definedVariables) {
+        if ((<QWebExprVar>v).expr) {
-      ctx.addLine(`let ${key} = ${definedVariables[key]}`);
+          ctx.addLine(`let ${(<QWebExprVar>v).id} = ${(<QWebExprVar>v).expr};`);
+        }
+        // todo: handle XML variables...
+      }
     }
 
     // compile sub template
     const subCtx = ctx
       .subContext("caller", nodeCopy)
-      .subContext("variables", Object.create(vars))
+      .subContext("variables", Object.create(vars));
-      .subContext("definedVariables", Object.create(definedVariables));
 
     qweb._compileNode(nodeTemplate.elem, subCtx);
 
@@ -243,23 +253,18 @@ QWeb.addDirective({
     ctx.addLine(
       `if (!_${arrayID}) { throw new Error('QWeb error: Invalid loop expression')}`
     );
-    ctx.addLine(
-      `if (typeof _${arrayID} === 'number') { _${arrayID} = Array.from(Array(_${arrayID}).keys())}`
-    );
     let keysID = ctx.generateID();
-    ctx.addLine(
-      `var _${keysID} = _${arrayID} instanceof Array ? _${arrayID} : Object.keys(_${arrayID});`
-    );
-    ctx.addLine(`var _length${keysID} = _${keysID}.length;`);
     let valuesID = ctx.generateID();
-    ctx.addLine(
+    ctx.addLine(`var _${keysID} = _${valuesID} = _${arrayID};`);
-      `var _${valuesID} = _${arrayID} instanceof Array ? _${arrayID} : Object.values(_${arrayID});`
+    ctx.addIf(`!(_${arrayID} instanceof Array)`);
-    );
+    ctx.addLine(`_${keysID} = Object.keys(_${arrayID});`);
+    ctx.addLine(`_${valuesID} = Object.values(_${arrayID});`);
+    ctx.closeIf();
+    ctx.addLine(`var _length${keysID} = _${keysID}.length;`);
     ctx.addLine(`for (let i = 0; i < _length${keysID}; i++) {`);
     ctx.indent();
     ctx.addLine(`context.${name}_first = i === 0;`);
     ctx.addLine(`context.${name}_last = i === _length${keysID} - 1;`);
-    ctx.addLine(`context.${name}_parity = i % 2 === 0 ? 'even' : 'odd';`);
     ctx.addLine(`context.${name}_index = i;`);
     ctx.addLine(`context.${name} = _${keysID}[i];`);
     ctx.addLine(`context.${name}_value = _${valuesID}[i];`);

src/qweb_expressions.ts

@@ -0,0 +1,270 @@
+/**
+ * Owl QWeb Expression Parser
+ *
+ * Owl needs in various contexts to be able to understand the structure of a
+ * string representing a javascript expression.  The usual goal is to be able
+ * to rewrite some variables.  For example, if a template has
+ *
+ *  ```xml
+ *  <t t-if="computeSomething({val: state.val})">...</t>
+ * ```
+ *
+ * this needs to be translated in something like this:
+ *
+ * ```js
+ *   if (context["computeSomething"]({val: context["state"].val})) { ... }
+ * ```
+ *
+ * This file contains the implementation of an extremely naive tokenizer/parser
+ * and evaluator for javascript expressions.  The supported grammar is basically
+ * only expressive enough to understand the shape of objects, of arrays, and
+ * various operators.
+ */
+
+//------------------------------------------------------------------------------
+// Misc types, constants and helpers
+//------------------------------------------------------------------------------
+
+const RESERVED_WORDS = "true,false,NaN,null,undefined,debugger,console,window,in,instanceof,new,function,return,this,typeof,eval,void,Math,RegExp,Array,Object,Date".split(
+  ","
+);
+
+const WORD_REPLACEMENT = {
+  and: "&&",
+  or: "||",
+  gt: ">",
+  gte: ">=",
+  lt: "<",
+  lte: "<="
+};
+
+export interface QWebExprVar {
+  id: string;
+  expr: string;
+}
+
+export interface QWebXMLVar {
+  xml: NodeList;
+}
+
+export type QWebVar = QWebExprVar | QWebXMLVar;
+
+//------------------------------------------------------------------------------
+// Tokenizer
+//------------------------------------------------------------------------------
+type TKind =
+  | "LEFT_BRACE"
+  | "RIGHT_BRACE"
+  | "LEFT_BRACKET"
+  | "RIGHT_BRACKET"
+  | "LEFT_PAREN"
+  | "RIGHT_PAREN"
+  | "COMMA"
+  | "VALUE"
+  | "SYMBOL"
+  | "OPERATOR"
+  | "COLON";
+
+interface Token {
+  type: TKind;
+  value: string;
+  size?: number;
+}
+
+const STATIC_TOKEN_MAP: { [key: string]: TKind } = {
+  "{": "LEFT_BRACE",
+  "}": "RIGHT_BRACE",
+  "[": "LEFT_BRACKET",
+  "]": "RIGHT_BRACKET",
+  ":": "COLON",
+  ",": "COMMA",
+  "(": "LEFT_PAREN",
+  ")": "RIGHT_PAREN"
+};
+
+const OPERATORS = ".,===,==,+,!,||,&&,>=,>,<=,<,?,-,*,/,%".split(',');
+
+type Tokenizer = (expr: string) => Token | false;
+
+let tokenizeString: Tokenizer = function(expr) {
+  let s = expr[0];
+  let start = s;
+  if (s !== "'" && s !== '"') {
+    return false;
+  }
+  let i = 1;
+  let cur;
+  while (expr[i] && expr[i] !== start) {
+    cur = expr[i];
+    s += cur;
+    if (cur === "\\") {
+      i++;
+      cur = expr[i];
+      if (!cur) {
+        throw new Error("Invalid expression");
+      }
+      s += cur;
+    }
+    i++;
+  }
+  if (expr[i] !== start) {
+    throw new Error("Invalid expression");
+  }
+  s += start;
+  return { type: "VALUE", value: s };
+};
+
+let tokenizeNumber: Tokenizer = function(expr) {
+  let s = expr[0];
+  if (s && s.match(/[0-9]/)) {
+    let i = 1;
+    while (expr[i] && expr[i].match(/[0-9]|\./)) {
+      s += expr[i];
+      i++;
+    }
+    return { type: "VALUE", value: s };
+  } else {
+    return false;
+  }
+};
+
+let tokenizeSymbol: Tokenizer = function(expr) {
+  let s = expr[0];
+  if (s && s.match(/[a-zA-Z_\$]/)) {
+    let i = 1;
+    while (expr[i] && expr[i].match(/\w/)) {
+      s += expr[i];
+      i++;
+    }
+    if (s in WORD_REPLACEMENT) {
+      return { type: "OPERATOR", value: WORD_REPLACEMENT[s], size: s.length };
+    }
+    return { type: "SYMBOL", value: s };
+  } else {
+    return false;
+  }
+};
+
+const tokenizeStatic: Tokenizer = function(expr) {
+  const char = expr[0];
+  if (char && char in STATIC_TOKEN_MAP) {
+    return { type: STATIC_TOKEN_MAP[char], value: char };
+  }
+  return false;
+};
+
+const tokenizeOperator: Tokenizer = function(expr) {
+  for (let op of OPERATORS) {
+    if (expr.startsWith(op)) {
+      return { type: "OPERATOR", value: op };
+    }
+  }
+  return false;
+};
+
+const TOKENIZERS = [
+  tokenizeString,
+  tokenizeNumber,
+  tokenizeSymbol,
+  tokenizeStatic,
+  tokenizeOperator
+];
+
+/**
+ * Convert a javascript expression (as a string) into a list of tokens. For
+ * example: `tokenize("1 + b")` will return:
+ * ```js
+ *  [
+ *   {type: "VALUE", value: "1"},
+ *   {type: "OPERATOR", value: "+"},
+ *   {type: "SYMBOL", value: "b"}
+ * ]
+ * ```
+ */
+export function tokenize(expr: string): Token[] {
+  const result: Token[] = [];
+  let token: boolean | Token = true;
+
+  while (token) {
+    expr = expr.trim();
+    if (expr) {
+      for (let tokenizer of TOKENIZERS) {
+        token = tokenizer(expr);
+        if (token) {
+          result.push(token);
+          expr = expr.slice(token.size || token.value.length);
+          break;
+        }
+      }
+    } else {
+      token = false;
+    }
+  }
+  if (expr.length) {
+    throw new Error(`Tokenizer error: could not tokenize "${expr}"`);
+  }
+  return result;
+}
+
+//------------------------------------------------------------------------------
+// Expression "evaluator"
+//------------------------------------------------------------------------------
+
+/**
+ * This is the main function exported by this file. This is the code that will
+ * process an expression (given as a string) and returns another expression with
+ * proper lookups in the context.
+ *
+ * Usually, this kind of code would be very simple to do if we had an AST (so,
+ * if we had a javascript parser), since then, we would only need to find the
+ * variables and replace them.  However, a parser is more complicated, and there
+ * are no standard builtin parser API.
+ *
+ * Since this method is applied to simple javasript expressions, and the work to
+ * be done is actually quite simple, we actually can get away with not using a
+ * parser, which helps with the code size.
+ *
+ * Here is the heuristic used by this method to determine if a token is a
+ * variable:
+ * - by default, all symbols are considered a variable
+ * - unless the previous token is a dot (in that case, this is a property: `a.b`)
+ * - or if the previous token is a left brace or a comma, and the next token is
+ *   a colon (in that case, this is an object key: `{a: b}`)
+ */
+export function compileExpr(
+  expr: string,
+  vars: { [key: string]: QWebVar }
+): string {
+  const tokens = tokenize(expr);
+  let result = "";
+  for (let i = 0; i < tokens.length; i++) {
+    let token = tokens[i];
+    if (token.type === "SYMBOL" && !RESERVED_WORDS.includes(token.value)) {
+      // we need to find if it is a variable
+      let isVar = true;
+      let prevToken = tokens[i - 1];
+      if (prevToken) {
+        if (prevToken.type === "OPERATOR" && prevToken.value === ".") {
+          isVar = false;
+        } else if (
+          prevToken.type === "LEFT_BRACE" ||
+          prevToken.type === "COMMA"
+        ) {
+          let nextToken = tokens[i + 1];
+          if (nextToken && nextToken.type === "COLON") {
+            isVar = false;
+          }
+        }
+      }
+      if (isVar) {
+        if (token.value in vars && "id" in vars[token.value]) {
+          token.value = (<QWebExprVar>vars[token.value]).id;
+        } else {
+          token.value = `context['${token.value}']`;
+        }
+      }
+    }
+    result += token.value;
+  }
+  return result;
+}

src/qweb_extensions.ts

@@ -1,4 +1,5 @@
 import { QWeb, UTILS } from "./qweb_core";
+import { VNode } from "./vdom";
 
 /**
  * Owl QWeb Extensions
@@ -11,6 +12,8 @@ import { QWeb, UTILS } from "./qweb_core";
  * - t-transition
  * - t-widget/t-keepalive
  * - t-mounted
+ * - t-slot
+ * - t-model
  */
 
 //------------------------------------------------------------------------------
@@ -94,7 +97,17 @@ UTILS.nextFrame = function(cb: () => void) {
   requestAnimationFrame(() => requestAnimationFrame(cb));
 };
 
-UTILS.transitionInsert = function(elm: HTMLElement, name: string) {
+UTILS.transitionInsert = function(vn: VNode, name: string) {
+  const elm = <HTMLElement>vn.elm;
+  // remove potential duplicated vnode that is currently being removed, to
+  // prevent from having twice the same node in the DOM during an animation
+  const dup =
+    elm.parentElement &&
+    elm.parentElement!.querySelector(`*[data-owl-key='${vn.key}']`);
+  if (dup) {
+    dup.remove();
+  }
+
   elm.classList.add(name + "-enter");
   elm.classList.add(name + "-enter-active");
   const finalize = () => {
@@ -108,11 +121,10 @@ UTILS.transitionInsert = function(elm: HTMLElement, name: string) {
   });
 };
 
-UTILS.transitionRemove = function(
+UTILS.transitionRemove = function(vn: VNode, name: string, rm: () => void) {
-  elm: HTMLElement,
+  const elm = <HTMLElement>vn.elm;
-  name: string,
+  elm.setAttribute("data-owl-key", vn.key!);
-  rm: () => void
+
-) {
   elm.classList.add(name + "-leave");
   elm.classList.add(name + "-leave-active");
   const finalize = () => {
@@ -169,8 +181,8 @@ QWeb.addDirective({
   atNodeCreation({ value, addNodeHook }) {
     let name = value;
     const hooks = {
-      insert: `this.utils.transitionInsert(vn.elm, '${name}');`,
+      insert: `this.utils.transitionInsert(vn, '${name}');`,
-      remove: `this.utils.transitionRemove(vn.elm, '${name}', rm);`
+      remove: `this.utils.transitionRemove(vn, '${name}', rm);`
     };
     for (let hookName in hooks) {
       addNodeHook(hookName, hooks[hookName]);
@@ -214,13 +226,6 @@ const T_WIDGET_MODS_CODE = Object.assign({}, MODS_CODE, {
  * // t-widget directive: we start by evaluating the expression given by t-key:
  * let key5 = "somestring";
  *
- * // We keep the index of the position of the widget in the closure.  We push
- * // null to reserve the slot, and will replace it later by the widget vnode,
- * // when it will be ready (do not forget that preparing/rendering a widget is
- * // asynchronous)
- * let _2_index = c1.length;
- * c1.push(null);
- *
  * // def3 is the promise that will contain later either the new widget
  * // creation, or the props update...
  * let def3;
@@ -235,6 +240,13 @@ const T_WIDGET_MODS_CODE = Object.assign({}, MODS_CODE, {
  *   ? context.__owl__.children[context.__owl__.cmap[key5]]
  *   : false;
  *
+ * // We keep the index of the position of the widget in the closure.  We push
+ * // null to reserve the slot, and will replace it later by the widget vnode,
+ * // when it will be ready (do not forget that preparing/rendering a widget is
+ * // asynchronous)
+ * let _2_index = c1.length;
+ * c1.push(null);
+ *
  * // we evaluate here the props given to the component. It is done here to be
  * // able to easily reference it later, and also, it might be an expensive
  * // computation, so it is certainly better to do it only once
@@ -296,7 +308,7 @@ const T_WIDGET_MODS_CODE = Object.assign({}, MODS_CODE, {
  *         let nvn = w4._mount(vnode, vn.elm);
  *         pvnode.elm = nvn.elm;
  *         // what follows is only present if there are animations on the widget
- *         utils.transitionInsert(vn.elm, "fade");
+ *         utils.transitionInsert(vn, "fade");
  *       },
  *       remove() {
  *         // override with empty function to prevent from removing the node
@@ -309,7 +321,7 @@ const T_WIDGET_MODS_CODE = Object.assign({}, MODS_CODE, {
  *         let finalize = () => {
  *           w4.destroy();
  *         };
- *         utils.transitionRemove(vn.elm, "fade", finalize);
+ *         utils.transitionRemove(vn, "fade", finalize);
  *       }
  *     };
  *     // the pvnode is inserted at the correct position in the div's children
@@ -349,14 +361,15 @@ const T_WIDGET_MODS_CODE = Object.assign({}, MODS_CODE, {
 
 QWeb.addDirective({
   name: "widget",
-  extraNames: ["props", "keepalive"],
+  extraNames: ["props", "keepalive", "asyncroot"],
   priority: 100,
-  atNodeEncounter({ ctx, value, node }): boolean {
+  atNodeEncounter({ ctx, value, node, qweb }): boolean {
     ctx.addLine("//WIDGET");
     ctx.rootContext.shouldDefineOwner = true;
     ctx.rootContext.shouldDefineQWeb = true;
     ctx.rootContext.shouldDefineUtils = true;
     let keepAlive = node.getAttribute("t-keepalive") ? true : false;
+    let async = node.getAttribute("t-asyncroot") ? true : false;
 
     // t-on- events and t-transition
     const events: [string, string[], string, string][] = [];
@@ -402,8 +415,6 @@ QWeb.addDirective({
       // want to evaluate it only once)
       ctx.addLine(`let key${keyID} = ${key};`);
     }
-    ctx.addLine(`let _${dummyID}_index = c${ctx.parentNode}.length;`);
-    ctx.addLine(`c${ctx.parentNode}.push(null);`);
     ctx.addLine(`let def${defID};`);
     let templateID = key
       ? `key${keyID}`
@@ -421,19 +432,19 @@ QWeb.addDirective({
     }
     let transitionsInsertCode = "";
     if (transition) {
-      transitionsInsertCode = `utils.transitionInsert(vn.elm, '${transition}');`;
+      transitionsInsertCode = `utils.transitionInsert(vn, '${transition}');`;
     }
     let finalizeWidgetCode = `w${widgetID}.${
       keepAlive ? "unmount" : "destroy"
     }();`;
-    if (ref) {
+    if (ref && !keepAlive) {
-      finalizeWidgetCode += `delete context.refs[${refKey}];`; // FIXME: shouldn't we keep ref if keepAlive is true?
+      finalizeWidgetCode += `delete context.refs[${refKey}];`;
     }
     if (transition) {
       finalizeWidgetCode = `let finalize = () => {
           ${finalizeWidgetCode}
         };
-        utils.transitionRemove(vn.elm, '${transition}', finalize);`;
+        utils.transitionRemove(vn, '${transition}', finalize);`;
     }
 
     let createHook = "";
@@ -494,6 +505,17 @@ QWeb.addDirective({
     ctx.addLine(
       `let w${widgetID} = ${templateID} in context.__owl__.cmap ? context.__owl__.children[context.__owl__.cmap[${templateID}]] : false;`
     );
+    ctx.addLine(`let _${dummyID}_index = c${ctx.parentNode}.length;`);
+    if (async) {
+      ctx.addLine(`const patchQueue${widgetID} = [];`);
+      ctx.addLine(
+        `c${
+          ctx.parentNode
+        }.push(w${widgetID} && w${widgetID}.__owl__.pvnode || null);`
+      );
+    } else {
+      ctx.addLine(`c${ctx.parentNode}.push(null);`);
+    }
     ctx.addLine(`let props${widgetID} = {${propStr}};`);
     ctx.addIf(
       `w${widgetID} && w${widgetID}.__owl__.renderPromise && !w${widgetID}.__owl__.vnode`
@@ -523,9 +545,32 @@ QWeb.addDirective({
     ctx.addLine(
       `context.__owl__.cmap[${templateID}] = w${widgetID}.__owl__.id;`
     );
+
+    // SLOTS
+    if (node.childElementCount) {
+      const clone = <Element>node.cloneNode(true);
+      const slotNodes = clone.querySelectorAll("[t-set]");
+      const slotId = qweb.nextSlotId++;
+      ctx.addLine(`w${widgetID}.__owl__.slotId = ${slotId};`);
+      if (slotNodes.length) {
+        for (let i = 0, length = slotNodes.length; i < length; i++) {
+          const slotNode = slotNodes[i];
+          slotNode.parentElement!.removeChild(slotNode);
+          const key = slotNode.getAttribute("t-set")!;
+          slotNode.removeAttribute("t-set");
+          const slotFn = qweb._compile(`slot_${key}_template`, slotNode);
+          qweb.slots[`${slotId}_${key}`] = slotFn.bind(qweb);
+        }
+      }
+      if (clone.childElementCount) {
+        const content = clone.children[0];
+        const slotFn = qweb._compile(`slot_default_template`, content);
+        qweb.slots[`${slotId}_default`] = slotFn.bind(qweb);
+      }
+    }
+
     ctx.addLine(`def${defID} = w${widgetID}._prepare();`);
     // hack: specify empty remove hook to prevent the node from being removed from the DOM
-    // FIXME: click to re-add widget during remove transition -> leak
     ctx.addLine(
       `def${defID} = def${defID}.then(vnode=>{${createHook}let pvnode=h(vnode.sel, {key: ${templateID}, hook: {insert(vn) {let nvn=w${widgetID}._mount(vnode, pvnode.elm);pvnode.elm=nvn.elm;${refExpr}${transitionsInsertCode}},remove() {},destroy(vn) {${finalizeWidgetCode}}}});c${
         ctx.parentNode
@@ -534,8 +579,9 @@ QWeb.addDirective({
 
     ctx.addElse();
     // need to update widget
+    const patchQueueCode = async ? `patchQueue${widgetID}` : "extra.patchQueue";
     ctx.addLine(
-      `def${defID} = def${defID} || w${widgetID}._updateProps(props${widgetID}, extra.forceUpdate, extra.patchQueue);`
+      `def${defID} = def${defID} || w${widgetID}._updateProps(props${widgetID}, extra.forceUpdate, ${patchQueueCode});`
     );
     let keepAliveCode = "";
     if (keepAlive) {
@@ -550,7 +596,13 @@ QWeb.addDirective({
     );
     ctx.closeIf();
 
-    ctx.addLine(`extra.promises.push(def${defID});`);
+    if (async) {
+      ctx.addLine(
+        `def${defID}.then(w${widgetID}._applyPatchQueue.bind(w${widgetID}, patchQueue${widgetID}));`
+      );
+    } else {
+      ctx.addLine(`extra.promises.push(def${defID});`);
+    }
 
     if (
       node.hasAttribute("t-if") ||
@@ -602,3 +654,69 @@ QWeb.addDirective({
     );
   }
 });
+
+//------------------------------------------------------------------------------
+// t-slot
+//------------------------------------------------------------------------------
+QWeb.addDirective({
+  name: "slot",
+  priority: 80,
+  atNodeEncounter({ ctx, value }): boolean {
+    const slotKey = ctx.generateID();
+    ctx.addLine(
+      `const slot${slotKey} = this.slots[context.__owl__.slotId + '_' + '${value}'];`
+    );
+    ctx.addLine(
+      `c${ctx.parentNode}.push(slot${slotKey}(context.__owl__.parent, extra));`
+    );
+    return true;
+  }
+});
+
+//------------------------------------------------------------------------------
+// t-model
+//------------------------------------------------------------------------------
+UTILS.toNumber = function(val: string): number | string {
+  const n = parseFloat(val);
+  return isNaN(n) ? val : n;
+};
+
+QWeb.addDirective({
+  name: "model",
+  priority: 42,
+  atNodeCreation({ ctx, nodeID, value, node, fullName }) {
+    const type = node.getAttribute("type");
+    let handler;
+    let event = fullName.includes(".lazy") ? "change" : "input";
+    if (node.tagName === "select") {
+      ctx.addLine(`p${nodeID}.props = {value: context.state['${value}']};`);
+      event = "change";
+      handler = `(ev) => {context.state['${value}'] = ev.target.value}`;
+    } else if (type === "checkbox") {
+      ctx.addLine(`p${nodeID}.props = {checked: context.state['${value}']};`);
+      handler = `(ev) => {context.state['${value}'] = ev.target.checked}`;
+    } else if (type === "radio") {
+      const nodeValue = node.getAttribute("value")!;
+      ctx.addLine(
+        `p${nodeID}.props = {checked:context.state['${value}'] === '${nodeValue}'};`
+      );
+      handler = `(ev) => {context.state['${value}'] = ev.target.value}`;
+      event = "click";
+    } else {
+      ctx.addLine(`p${nodeID}.props = {value: context.state['${value}']};`);
+      const trimCode = fullName.includes(".trim") ? ".trim()" : "";
+      let valueCode = `ev.target.value${trimCode}`;
+      if (fullName.includes(".number")) {
+        ctx.rootContext.shouldDefineUtils = true;
+        valueCode = `utils.toNumber(${valueCode})`;
+      }
+      handler = `(ev) => {context.state['${value}'] = ${valueCode}}`;
+    }
+    ctx.addLine(
+      `extra.handlers['${event}' + ${nodeID}] = extra.handlers['${event}' + ${nodeID}] || (${handler});`
+    );
+    ctx.addLine(
+      `p${nodeID}.on['${event}'] = extra.handlers['${event}' + ${nodeID}];`
+    );
+  }
+});

src/store.ts

@@ -21,7 +21,7 @@ import { Observer } from "./observer";
 // Store Definition
 //------------------------------------------------------------------------------
 
-type Mutation = ({ state, commit, set, getters }, payload: any) => void;
+type Mutation = ({ state, commit, getters }, payload: any) => void;
 type Action = ({ commit, state, dispatch, env, getters }, payload: any) => void;
 type Getter = ({ state, getters }, payload) => any;
 
@@ -46,8 +46,8 @@ export class Store extends EventBus {
   debug: boolean;
   env: any;
   observer: Observer;
-  set: any;
   getters: { [name: string]: (payload?) => any };
+  _gettersCache: { [name: string]: {} };
 
   constructor(config: StoreConfig, options: StoreOption = {}) {
     super();
@@ -57,20 +57,31 @@ export class Store extends EventBus {
     this.mutations = config.mutations;
     this.env = config.env;
     this.observer = new Observer();
-    this.observer.notifyCB = this.trigger.bind(this, "update");
+    this.observer.notifyCB = () => {
+      this._gettersCache = {};
+      this.trigger("update");
+    };
     this.observer.allowMutations = false;
     this.observer.observe(this.state);
     this.getters = {};
+    this._gettersCache = {};
 
     if (this.debug) {
       this.history.push({ state: this.state });
     }
-    this.set = this.observer.set.bind(this.observer);
 
+    const cTypes = ["undefined", "number", "string"];
     for (let entry of Object.entries(config.getters || {})) {
       const name: string = entry[0];
       const func: (...any) => any = entry[1];
       this.getters[name] = payload => {
+        if (this._commitLevel === 0 && cTypes.indexOf(typeof payload) >= 0) {
+          this._gettersCache[name] = this._gettersCache[name] || {};
+          this._gettersCache[name][payload] =
+            this._gettersCache[name][payload] ||
+            func({ state: this.state, getters: this.getters }, payload);
+          return this._gettersCache[name][payload];
+        }
         return func({ state: this.state, getters: this.getters }, payload);
       };
     }
@@ -110,7 +121,6 @@ export class Store extends EventBus {
       {
         commit: this.commit.bind(this),
         state: this.state,
-        set: this.set,
         getters: this.getters
       },
       payload
@@ -153,11 +163,22 @@ type Constructor<T> = new (...args: any[]) => T;
 interface EnvWithStore extends Env {
   store: Store;
 }
+type HashFunction = (a: any, b: any) => number;
+interface StoreOptions {
+  getStore?(Env): Store;
+  hashFunction?: HashFunction;
+  deep?: boolean;
+}
 
 let nextID = 1;
 
-export function connect(mapStateToProps, options: any = {}) {
+export function connect<E extends EnvWithStore, P, S>(
+  Comp: Constructor<Component<E, P, S>>,
+  mapStoreToProps,
+  options: StoreOptions = <StoreOptions>{}
+) {
   let hashFunction = options.hashFunction || null;
+  const getStore = options.getStore || (env => env.store);
 
   if (!hashFunction) {
     let deep = "deep" in options ? options.deep : true;
@@ -183,101 +204,95 @@ export function connect(mapStateToProps, options: any = {}) {
     };
   }
 
-  return function<E extends EnvWithStore, P, S>(
+  const Result = class extends Comp {
-    Comp: Constructor<Component<E, P, S>>
+    constructor(parent, props?: any) {
-  ) {
+      const env = parent instanceof Component ? parent.env : parent;
-    const Result = class extends Comp {
+      const store = getStore(env);
-      constructor(parent, props?: any) {
+      const ownProps = Object.assign({}, props || {});
-        const env = parent instanceof Component ? parent.env : parent;
+      const storeProps = mapStoreToProps(store.state, ownProps, store.getters);
-        const ownProps = Object.assign({}, props || {});
+      const mergedProps = Object.assign({}, props || {}, storeProps);
-        const storeProps = mapStateToProps(
+      super(parent, mergedProps);
-          env.store.state,
+      (<any>this.__owl__).ownProps = ownProps;
-          ownProps,
+      (<any>this.__owl__).currentStoreProps = storeProps;
-          env.store.getters
+      (<any>this.__owl__).store = store;
-        );
+      (<any>this.__owl__).storeHash = (<HashFunction>hashFunction)(
-        const mergedProps = Object.assign({}, props || {}, storeProps);
+        {
-        super(parent, mergedProps);
+          state: store.state,
-        (<any>this.__owl__).ownProps = ownProps;
+          storeProps: storeProps,
+          revNumber,
+          deepRevNumber
+        },
+        {
+          currentStoreProps: storeProps
+        }
+      );
+    }
+    /**
+     * We do not use the mounted hook here for a subtle reason: we want the
+     * updates to be called for the parents before the children.  However,
+     * if we use the mounted hook, this will be done in the reverse order.
+     */
+    _callMounted() {
+      (<any>this.__owl__).store.on("update", this, this._checkUpdate);
+      super._callMounted();
+    }
+    willUnmount() {
+      (<any>this.__owl__).store.off("update", this);
+      super.willUnmount();
+    }
+
+    _checkUpdate() {
+      const ownProps = (<any>this.__owl__).ownProps;
+      const storeProps = mapStoreToProps(
+        (<any>this.__owl__).store.state,
+        ownProps,
+        (<any>this.__owl__).store.getters
+      );
+      const options: any = {
+        currentStoreProps: (<any>this.__owl__).currentStoreProps
+      };
+      const storeHash = (<HashFunction>hashFunction)(
+        {
+          state: (<any>this.__owl__).store.state,
+          storeProps: storeProps,
+          revNumber,
+          deepRevNumber
+        },
+        options
+      );
+      let didChange = options.didChange;
+      if (storeHash !== (<any>this.__owl__).storeHash) {
+        didChange = true;
+        (<any>this.__owl__).storeHash = storeHash;
+      }
+      if (didChange) {
         (<any>this.__owl__).currentStoreProps = storeProps;
-        (<any>this.__owl__).storeHash = hashFunction(
+        this._updateProps(ownProps, false);
-          {
-            state: env.store.state,
-            storeProps: storeProps,
-            revNumber,
-            deepRevNumber
-          },
-          {
-            currentStoreProps: storeProps
-          }
-        );
       }
-      /**
+    }
-       * We do not use the mounted hook here for a subtle reason: we want the
+    _updateProps(nextProps, forceUpdate, patchQueue?: any[]) {
-       * updates to be called for the parents before the children.  However,
+      if ((<any>this.__owl__).ownProps !== nextProps) {
-       * if we use the mounted hook, this will be done in the reverse order.
+        (<any>this.__owl__).currentStoreProps = mapStoreToProps(
-       */
+          (<any>this.__owl__).store.state,
-      _callMounted() {
-        this.env.store.on("update", this, this._checkUpdate);
-        super._callMounted();
-      }
-      willUnmount() {
-        this.env.store.off("update", this);
-        super.willUnmount();
-      }
-
-      _checkUpdate() {
-        const ownProps = (<any>this.__owl__).ownProps;
-        const storeProps = mapStateToProps(
-          this.env.store.state,
-          ownProps,
-          this.env.store.getters
-        );
-        const options: any = {
-          currentStoreProps: (<any>this.__owl__).currentStoreProps
-        };
-        const storeHash = hashFunction(
-          {
-            state: this.env.store.state,
-            storeProps: storeProps,
-            revNumber,
-            deepRevNumber
-          },
-          options
-        );
-        let didChange = options.didChange;
-        if (storeHash !== (<any>this.__owl__).storeHash) {
-          didChange = true;
-          (<any>this.__owl__).storeHash = storeHash;
-        }
-        if (didChange) {
-          (<any>this.__owl__).currentStoreProps = storeProps;
-          this._updateProps(ownProps, false);
-        }
-      }
-      _updateProps(nextProps, forceUpdate, patchQueue?: any[]) {
-        if ((<any>this.__owl__).ownProps !== nextProps) {
-          (<any>this.__owl__).currentStoreProps = mapStateToProps(
-            this.env.store.state,
-            nextProps,
-            this.env.store.getters
-          );
-        }
-        (<any>this.__owl__).ownProps = nextProps;
-        const mergedProps = Object.assign(
-          {},
           nextProps,
-          (<any>this.__owl__).currentStoreProps
+          (<any>this.__owl__).store.getters
         );
-        return super._updateProps(mergedProps, forceUpdate, patchQueue);
       }
-    };
+      (<any>this.__owl__).ownProps = nextProps;
-
+      const mergedProps = Object.assign(
-    // we assign here a unique name to the resulting anonymous class.
+        {},
-    // this is necessary for Owl to be able to properly deduce templates.
+        nextProps,
-    // Otherwise, all connected components would have the same name, and then
+        (<any>this.__owl__).currentStoreProps
-    // each component after the first will necessarily have the same template.
+      );
-    let name = `ConnectedComponent${nextID++}`;
+      return super._updateProps(mergedProps, forceUpdate, patchQueue);
-    Object.defineProperty(Result, "name", { value: name });
+    }
-    return Result;
   };
+
+  // we assign here a unique name to the resulting anonymous class.
+  // this is necessary for Owl to be able to properly deduce templates.
+  // Otherwise, all connected components would have the same name, and then
+  // each component after the first will necessarily have the same template.
+  let name = `ConnectedComponent${nextID++}`;
+  Object.defineProperty(Result, "name", { value: name });
+  return Result;
 }

src/utils.ts

@@ -11,11 +11,13 @@
  */
 
 export function whenReady(fn) {
-  if (document.readyState === "complete") {
+  return new Promise(function(resolve) {
-    fn();
+    if (document.readyState !== "loading") {
-  } else {
+      resolve();
-    document.addEventListener("DOMContentLoaded", fn, false);
+    } else {
-  }
+      document.addEventListener("DOMContentLoaded", resolve, false);
+    }
+  }).then(fn || function () {});
 }
 
 const loadedScripts: { [key: string]: Promise<void> } = {};

src/vdom.ts

@@ -59,14 +59,7 @@ function vnode(
   elm: Element | Text | undefined
 ): VNode {
   let key = data === undefined ? undefined : data.key;
-  return {
+  return {sel, data, children, text, elm, key};
-    sel: sel,
-    data: data,
-    children: children,
-    text: text,
-    elm: elm,
-    key: key
-  };
 }
 
 //------------------------------------------------------------------------------

tests/__snapshots__/animations.test.ts.snap

@@ -10,10 +10,10 @@ exports[`animations t-transition combined with t-widget 1`] = `
     let c1 = [], p1 = {key:1};
     var vn1 = h('div', p1, c1);
     //WIDGET
-    let _2_index = c1.length;
-    c1.push(null);
     let def3;
     let w4 = 4 in context.__owl__.cmap ? context.__owl__.children[context.__owl__.cmap[4]] : false;
+    let _2_index = c1.length;
+    c1.push(null);
     let props4 = {};
     if (w4 && w4.__owl__.renderPromise && !w4.__owl__.vnode) {
         if (utils.shallowEqual(props4, w4.__owl__.renderProps)) {
@@ -30,10 +30,10 @@ exports[`animations t-transition combined with t-widget 1`] = `
         w4 = new W4(owner, props4);
         context.__owl__.cmap[4] = w4.__owl__.id;
         def3 = w4._prepare();
-        def3 = def3.then(vnode=>{let pvnode=h(vnode.sel, {key: 4, hook: {insert(vn) {let nvn=w4._mount(vnode, pvnode.elm);pvnode.elm=nvn.elm;utils.transitionInsert(vn.elm, 'chimay');},remove() {},destroy(vn) {let finalize = () => {
+        def3 = def3.then(vnode=>{let pvnode=h(vnode.sel, {key: 4, hook: {insert(vn) {let nvn=w4._mount(vnode, pvnode.elm);pvnode.elm=nvn.elm;utils.transitionInsert(vn, 'chimay');},remove() {},destroy(vn) {let finalize = () => {
           w4.destroy();
         };
-        utils.transitionRemove(vn.elm, 'chimay', finalize);}}});c1[_2_index]=pvnode;w4.__owl__.pvnode = pvnode;});
+        utils.transitionRemove(vn, 'chimay', finalize);}}});c1[_2_index]=pvnode;w4.__owl__.pvnode = pvnode;});
     } else {
         def3 = def3 || w4._updateProps(props4, extra.forceUpdate, extra.patchQueue);
         def3 = def3.then(()=>{if (w4.__owl__.isDestroyed) {return};let pvnode=w4.__owl__.pvnode;c1[_2_index]=pvnode;});
@@ -54,10 +54,10 @@ exports[`animations t-transition combined with t-widget and t-if 1`] = `
     var vn1 = h('div', p1, c1);
     if (context['state'].display) {
         //WIDGET
-        let _2_index = c1.length;
-        c1.push(null);
         let def3;
         let w4 = 4 in context.__owl__.cmap ? context.__owl__.children[context.__owl__.cmap[4]] : false;
+        let _2_index = c1.length;
+        c1.push(null);
         let props4 = {};
         if (w4 && w4.__owl__.renderPromise && !w4.__owl__.vnode) {
             if (utils.shallowEqual(props4, w4.__owl__.renderProps)) {
@@ -74,10 +74,10 @@ exports[`animations t-transition combined with t-widget and t-if 1`] = `
             w4 = new W4(owner, props4);
             context.__owl__.cmap[4] = w4.__owl__.id;
             def3 = w4._prepare();
-            def3 = def3.then(vnode=>{let pvnode=h(vnode.sel, {key: 4, hook: {insert(vn) {let nvn=w4._mount(vnode, pvnode.elm);pvnode.elm=nvn.elm;utils.transitionInsert(vn.elm, 'chimay');},remove() {},destroy(vn) {let finalize = () => {
+            def3 = def3.then(vnode=>{let pvnode=h(vnode.sel, {key: 4, hook: {insert(vn) {let nvn=w4._mount(vnode, pvnode.elm);pvnode.elm=nvn.elm;utils.transitionInsert(vn, 'chimay');},remove() {},destroy(vn) {let finalize = () => {
           w4.destroy();
         };
-        utils.transitionRemove(vn.elm, 'chimay', finalize);}}});c1[_2_index]=pvnode;w4.__owl__.pvnode = pvnode;});
+        utils.transitionRemove(vn, 'chimay', finalize);}}});c1[_2_index]=pvnode;w4.__owl__.pvnode = pvnode;});
         } else {
             def3 = def3 || w4._updateProps(props4, extra.forceUpdate, extra.patchQueue);
             def3 = def3.then(()=>{if (w4.__owl__.isDestroyed) {return};let pvnode=w4.__owl__.pvnode;c1[_2_index]=pvnode;});
@@ -96,10 +96,10 @@ exports[`animations t-transition with no delay/duration 1`] = `
     var vn1 = h('span', p1, c1);
     p1.hook = {
       insert: vn => {
-        this.utils.transitionInsert(vn.elm, 'jupiler');
+        this.utils.transitionInsert(vn, 'jupiler');
       },
       remove: (vn, rm) => {
-        this.utils.transitionRemove(vn.elm, 'jupiler', rm);
+        this.utils.transitionRemove(vn, 'jupiler', rm);
       },
     };
     c1.push({text: \`blue\`});
@@ -115,10 +115,10 @@ exports[`animations t-transition, on a simple node (insert) 1`] = `
     var vn1 = h('span', p1, c1);
     p1.hook = {
       insert: vn => {
-        this.utils.transitionInsert(vn.elm, 'chimay');
+        this.utils.transitionInsert(vn, 'chimay');
       },
       remove: (vn, rm) => {
-        this.utils.transitionRemove(vn.elm, 'chimay', rm);
+        this.utils.transitionRemove(vn, 'chimay', rm);
       },
     };
     c1.push({text: \`blue\`});

tests/__snapshots__/component.test.ts.snap

@@ -1,5 +1,248 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
+exports[`async rendering delayed t-widget with t-asyncroot directive 1`] = `
+"function anonymous(context,extra
+) {
+    let utils = this.utils;
+    let QWeb = this.constructor;
+    let owner = context;
+    var h = this.utils.h;
+    let c1 = [], p1 = {key:1};
+    var vn1 = h('div', p1, c1);
+    let c2 = [], p2 = {key:2,on:{}};
+    var vn2 = h('button', p2, c2);
+    c1.push(vn2);
+    if (!context['updateApp']) {
+        throw new Error('Missing handler \\\\'' + 'updateApp' + \`\\\\' when evaluating template 'Parent'\`)
+    }
+    extra.handlers['click' + 2] = extra.handlers['click' + 2] || context['updateApp'].bind(owner);
+    p2.on['click'] = extra.handlers['click' + 2];
+    c2.push({text: \`Update App State\`});
+    var _3 = 'children';
+    let c4 = [], p4 = {key:4,attrs:{class: _3}};
+    var vn4 = h('div', p4, c4);
+    c1.push(vn4);
+    //WIDGET
+    let def6;
+    let w7 = 7 in context.__owl__.cmap ? context.__owl__.children[context.__owl__.cmap[7]] : false;
+    let _5_index = c4.length;
+    c4.push(null);
+    let props7 = {val:context['state'].val};
+    if (w7 && w7.__owl__.renderPromise && !w7.__owl__.vnode) {
+        if (utils.shallowEqual(props7, w7.__owl__.renderProps)) {
+            def6 = w7.__owl__.renderPromise;
+        } else {
+            w7.destroy();
+            w7 = false;
+        }
+    }
+    if (!w7) {
+        let widgetKey7 = \`Child\`;
+        let W7 = context.widgets && context.widgets[widgetKey7] || QWeb.widgets[widgetKey7];
+        if (!W7) {throw new Error('Cannot find the definition of widget \\"' + widgetKey7 + '\\"')}
+        w7 = new W7(owner, props7);
+        context.__owl__.cmap[7] = w7.__owl__.id;
+        def6 = w7._prepare();
+        def6 = def6.then(vnode=>{let pvnode=h(vnode.sel, {key: 7, hook: {insert(vn) {let nvn=w7._mount(vnode, pvnode.elm);pvnode.elm=nvn.elm;},remove() {},destroy(vn) {w7.destroy();}}});c4[_5_index]=pvnode;w7.__owl__.pvnode = pvnode;});
+    } else {
+        def6 = def6 || w7._updateProps(props7, extra.forceUpdate, extra.patchQueue);
+        def6 = def6.then(()=>{if (w7.__owl__.isDestroyed) {return};let pvnode=w7.__owl__.pvnode;c4[_5_index]=pvnode;});
+    }
+    extra.promises.push(def6);
+    //WIDGET
+    let def9;
+    let w10 = 10 in context.__owl__.cmap ? context.__owl__.children[context.__owl__.cmap[10]] : false;
+    let _8_index = c4.length;
+    const patchQueue10 = [];
+    c4.push(w10 && w10.__owl__.pvnode || null);
+    let props10 = {val:context['state'].val};
+    if (w10 && w10.__owl__.renderPromise && !w10.__owl__.vnode) {
+        if (utils.shallowEqual(props10, w10.__owl__.renderProps)) {
+            def9 = w10.__owl__.renderPromise;
+        } else {
+            w10.destroy();
+            w10 = false;
+        }
+    }
+    if (!w10) {
+        let widgetKey10 = \`AsyncChild\`;
+        let W10 = context.widgets && context.widgets[widgetKey10] || QWeb.widgets[widgetKey10];
+        if (!W10) {throw new Error('Cannot find the definition of widget \\"' + widgetKey10 + '\\"')}
+        w10 = new W10(owner, props10);
+        context.__owl__.cmap[10] = w10.__owl__.id;
+        def9 = w10._prepare();
+        def9 = def9.then(vnode=>{let pvnode=h(vnode.sel, {key: 10, hook: {insert(vn) {let nvn=w10._mount(vnode, pvnode.elm);pvnode.elm=nvn.elm;},remove() {},destroy(vn) {w10.destroy();}}});c4[_8_index]=pvnode;w10.__owl__.pvnode = pvnode;});
+    } else {
+        def9 = def9 || w10._updateProps(props10, extra.forceUpdate, patchQueue10);
+        def9 = def9.then(()=>{if (w10.__owl__.isDestroyed) {return};let pvnode=w10.__owl__.pvnode;c4[_8_index]=pvnode;});
+    }
+    def9.then(w10._applyPatchQueue.bind(w10, patchQueue10));
+    return vn1;
+}"
+`;
+
+exports[`async rendering fast t-widget with t-asyncroot directive 1`] = `
+"function anonymous(context,extra
+) {
+    let utils = this.utils;
+    let QWeb = this.constructor;
+    let owner = context;
+    var h = this.utils.h;
+    let c1 = [], p1 = {key:1};
+    var vn1 = h('div', p1, c1);
+    let c2 = [], p2 = {key:2,on:{}};
+    var vn2 = h('button', p2, c2);
+    c1.push(vn2);
+    if (!context['updateApp']) {
+        throw new Error('Missing handler \\\\'' + 'updateApp' + \`\\\\' when evaluating template 'Parent'\`)
+    }
+    extra.handlers['click' + 2] = extra.handlers['click' + 2] || context['updateApp'].bind(owner);
+    p2.on['click'] = extra.handlers['click' + 2];
+    c2.push({text: \`Update App State\`});
+    var _3 = 'children';
+    let c4 = [], p4 = {key:4,attrs:{class: _3}};
+    var vn4 = h('div', p4, c4);
+    c1.push(vn4);
+    //WIDGET
+    let def6;
+    let w7 = 7 in context.__owl__.cmap ? context.__owl__.children[context.__owl__.cmap[7]] : false;
+    let _5_index = c4.length;
+    const patchQueue7 = [];
+    c4.push(w7 && w7.__owl__.pvnode || null);
+    let props7 = {val:context['state'].val};
+    if (w7 && w7.__owl__.renderPromise && !w7.__owl__.vnode) {
+        if (utils.shallowEqual(props7, w7.__owl__.renderProps)) {
+            def6 = w7.__owl__.renderPromise;
+        } else {
+            w7.destroy();
+            w7 = false;
+        }
+    }
+    if (!w7) {
+        let widgetKey7 = \`Child\`;
+        let W7 = context.widgets && context.widgets[widgetKey7] || QWeb.widgets[widgetKey7];
+        if (!W7) {throw new Error('Cannot find the definition of widget \\"' + widgetKey7 + '\\"')}
+        w7 = new W7(owner, props7);
+        context.__owl__.cmap[7] = w7.__owl__.id;
+        def6 = w7._prepare();
+        def6 = def6.then(vnode=>{let pvnode=h(vnode.sel, {key: 7, hook: {insert(vn) {let nvn=w7._mount(vnode, pvnode.elm);pvnode.elm=nvn.elm;},remove() {},destroy(vn) {w7.destroy();}}});c4[_5_index]=pvnode;w7.__owl__.pvnode = pvnode;});
+    } else {
+        def6 = def6 || w7._updateProps(props7, extra.forceUpdate, patchQueue7);
+        def6 = def6.then(()=>{if (w7.__owl__.isDestroyed) {return};let pvnode=w7.__owl__.pvnode;c4[_5_index]=pvnode;});
+    }
+    def6.then(w7._applyPatchQueue.bind(w7, patchQueue7));
+    //WIDGET
+    let def9;
+    let w10 = 10 in context.__owl__.cmap ? context.__owl__.children[context.__owl__.cmap[10]] : false;
+    let _8_index = c4.length;
+    c4.push(null);
+    let props10 = {val:context['state'].val};
+    if (w10 && w10.__owl__.renderPromise && !w10.__owl__.vnode) {
+        if (utils.shallowEqual(props10, w10.__owl__.renderProps)) {
+            def9 = w10.__owl__.renderPromise;
+        } else {
+            w10.destroy();
+            w10 = false;
+        }
+    }
+    if (!w10) {
+        let widgetKey10 = \`AsyncChild\`;
+        let W10 = context.widgets && context.widgets[widgetKey10] || QWeb.widgets[widgetKey10];
+        if (!W10) {throw new Error('Cannot find the definition of widget \\"' + widgetKey10 + '\\"')}
+        w10 = new W10(owner, props10);
+        context.__owl__.cmap[10] = w10.__owl__.id;
+        def9 = w10._prepare();
+        def9 = def9.then(vnode=>{let pvnode=h(vnode.sel, {key: 10, hook: {insert(vn) {let nvn=w10._mount(vnode, pvnode.elm);pvnode.elm=nvn.elm;},remove() {},destroy(vn) {w10.destroy();}}});c4[_8_index]=pvnode;w10.__owl__.pvnode = pvnode;});
+    } else {
+        def9 = def9 || w10._updateProps(props10, extra.forceUpdate, extra.patchQueue);
+        def9 = def9.then(()=>{if (w10.__owl__.isDestroyed) {return};let pvnode=w10.__owl__.pvnode;c4[_8_index]=pvnode;});
+    }
+    extra.promises.push(def9);
+    return vn1;
+}"
+`;
+
+exports[`async rendering t-widget with t-asyncroot directive: mixed re-renderings 1`] = `
+"function anonymous(context,extra
+) {
+    let utils = this.utils;
+    let QWeb = this.constructor;
+    let owner = context;
+    var h = this.utils.h;
+    let c1 = [], p1 = {key:1};
+    var vn1 = h('div', p1, c1);
+    let c2 = [], p2 = {key:2,on:{}};
+    var vn2 = h('button', p2, c2);
+    c1.push(vn2);
+    if (!context['updateApp']) {
+        throw new Error('Missing handler \\\\'' + 'updateApp' + \`\\\\' when evaluating template 'Parent'\`)
+    }
+    extra.handlers['click' + 2] = extra.handlers['click' + 2] || context['updateApp'].bind(owner);
+    p2.on['click'] = extra.handlers['click' + 2];
+    c2.push({text: \`Update App State\`});
+    var _3 = 'children';
+    let c4 = [], p4 = {key:4,attrs:{class: _3}};
+    var vn4 = h('div', p4, c4);
+    c1.push(vn4);
+    //WIDGET
+    let def6;
+    let w7 = 7 in context.__owl__.cmap ? context.__owl__.children[context.__owl__.cmap[7]] : false;
+    let _5_index = c4.length;
+    c4.push(null);
+    let props7 = {val:context['state'].val};
+    if (w7 && w7.__owl__.renderPromise && !w7.__owl__.vnode) {
+        if (utils.shallowEqual(props7, w7.__owl__.renderProps)) {
+            def6 = w7.__owl__.renderPromise;
+        } else {
+            w7.destroy();
+            w7 = false;
+        }
+    }
+    if (!w7) {
+        let widgetKey7 = \`Child\`;
+        let W7 = context.widgets && context.widgets[widgetKey7] || QWeb.widgets[widgetKey7];
+        if (!W7) {throw new Error('Cannot find the definition of widget \\"' + widgetKey7 + '\\"')}
+        w7 = new W7(owner, props7);
+        context.__owl__.cmap[7] = w7.__owl__.id;
+        def6 = w7._prepare();
+        def6 = def6.then(vnode=>{let pvnode=h(vnode.sel, {key: 7, hook: {insert(vn) {let nvn=w7._mount(vnode, pvnode.elm);pvnode.elm=nvn.elm;},remove() {},destroy(vn) {w7.destroy();}}});c4[_5_index]=pvnode;w7.__owl__.pvnode = pvnode;});
+    } else {
+        def6 = def6 || w7._updateProps(props7, extra.forceUpdate, extra.patchQueue);
+        def6 = def6.then(()=>{if (w7.__owl__.isDestroyed) {return};let pvnode=w7.__owl__.pvnode;c4[_5_index]=pvnode;});
+    }
+    extra.promises.push(def6);
+    //WIDGET
+    let def9;
+    let w10 = 10 in context.__owl__.cmap ? context.__owl__.children[context.__owl__.cmap[10]] : false;
+    let _8_index = c4.length;
+    const patchQueue10 = [];
+    c4.push(w10 && w10.__owl__.pvnode || null);
+    let props10 = {val:context['state'].val};
+    if (w10 && w10.__owl__.renderPromise && !w10.__owl__.vnode) {
+        if (utils.shallowEqual(props10, w10.__owl__.renderProps)) {
+            def9 = w10.__owl__.renderPromise;
+        } else {
+            w10.destroy();
+            w10 = false;
+        }
+    }
+    if (!w10) {
+        let widgetKey10 = \`AsyncChild\`;
+        let W10 = context.widgets && context.widgets[widgetKey10] || QWeb.widgets[widgetKey10];
+        if (!W10) {throw new Error('Cannot find the definition of widget \\"' + widgetKey10 + '\\"')}
+        w10 = new W10(owner, props10);
+        context.__owl__.cmap[10] = w10.__owl__.id;
+        def9 = w10._prepare();
+        def9 = def9.then(vnode=>{let pvnode=h(vnode.sel, {key: 10, hook: {insert(vn) {let nvn=w10._mount(vnode, pvnode.elm);pvnode.elm=nvn.elm;},remove() {},destroy(vn) {w10.destroy();}}});c4[_8_index]=pvnode;w10.__owl__.pvnode = pvnode;});
+    } else {
+        def9 = def9 || w10._updateProps(props10, extra.forceUpdate, patchQueue10);
+        def9 = def9.then(()=>{if (w10.__owl__.isDestroyed) {return};let pvnode=w10.__owl__.pvnode;c4[_8_index]=pvnode;});
+    }
+    def9.then(w10._applyPatchQueue.bind(w10, patchQueue10));
+    return vn1;
+}"
+`;
+
 exports[`class and style attributes with t-widget dynamic t-att-style is properly added and updated on widget root el 1`] = `
 "function anonymous(context,extra
 ) {
@@ -10,11 +253,11 @@ exports[`class and style attributes with t-widget dynamic t-att-style is properl
     let c1 = [], p1 = {key:1};
     var vn1 = h('div', p1, c1);
     //WIDGET
-    let _2_index = c1.length;
-    c1.push(null);
     let def3;
     const _5 = context['state'].style;
     let w4 = 4 in context.__owl__.cmap ? context.__owl__.children[context.__owl__.cmap[4]] : false;
+    let _2_index = c1.length;
+    c1.push(null);
     let props4 = {};
     if (w4 && w4.__owl__.renderPromise && !w4.__owl__.vnode) {
         if (utils.shallowEqual(props4, w4.__owl__.renderProps)) {
@@ -51,11 +294,11 @@ exports[`class and style attributes with t-widget t-att-class is properly added/
     let c1 = [], p1 = {key:1};
     var vn1 = h('div', p1, c1);
     //WIDGET
+    let def3;
+    const _5 = {a:context['state'].a,b:context['state'].b};
+    let w4 = 4 in context.__owl__.cmap ? context.__owl__.children[context.__owl__.cmap[4]] : false;
     let _2_index = c1.length;
     c1.push(null);
-    let def3;
-    const _5 = {a: context['state'].a,b: context['state'].b};
-    let w4 = 4 in context.__owl__.cmap ? context.__owl__.children[context.__owl__.cmap[4]] : false;
     let props4 = {};
     if (w4 && w4.__owl__.renderPromise && !w4.__owl__.vnode) {
         if (utils.shallowEqual(props4, w4.__owl__.renderProps)) {
@@ -98,23 +341,24 @@ exports[`composition sub widgets with some state rendered in a loop 1`] = `
     var vn1 = h('div', p1, c1);
     var _2 = context['state'].numbers;
     if (!_2) { throw new Error('QWeb error: Invalid loop expression')}
-    if (typeof _2 === 'number') { _2 = Array.from(Array(_2).keys())}
+    var _3 = _4 = _2;
-    var _3 = _2 instanceof Array ? _2 : Object.keys(_2);
+    if (!(_2 instanceof Array)) {
+        _3 = Object.keys(_2);
+        _4 = Object.values(_2);
+    }
     var _length3 = _3.length;
-    var _4 = _2 instanceof Array ? _2 : Object.values(_2);
     for (let i = 0; i < _length3; i++) {
         context.number_first = i === 0;
         context.number_last = i === _length3 - 1;
-        context.number_parity = i % 2 === 0 ? 'even' : 'odd';
         context.number_index = i;
         context.number = _3[i];
         context.number_value = _4[i];
         //WIDGET
         let key8 = context['number'];
-        let _5_index = c1.length;
-        c1.push(null);
         let def6;
         let w7 = key8 in context.__owl__.cmap ? context.__owl__.children[context.__owl__.cmap[key8]] : false;
+        let _5_index = c1.length;
+        c1.push(null);
         let props7 = {};
         if (w7 && w7.__owl__.renderPromise && !w7.__owl__.vnode) {
             if (utils.shallowEqual(props7, w7.__owl__.renderProps)) {
@@ -152,10 +396,10 @@ exports[`composition t-widget with dynamic value 1`] = `
     let c1 = [], p1 = {key:1};
     var vn1 = h('div', p1, c1);
     //WIDGET
-    let _2_index = c1.length;
-    c1.push(null);
     let def3;
     let w4 = 4 in context.__owl__.cmap ? context.__owl__.children[context.__owl__.cmap[4]] : false;
+    let _2_index = c1.length;
+    c1.push(null);
     let props4 = {};
     if (w4 && w4.__owl__.renderPromise && !w4.__owl__.vnode) {
         if (utils.shallowEqual(props4, w4.__owl__.renderProps)) {
@@ -192,10 +436,10 @@ exports[`composition t-widget with dynamic value 2 1`] = `
     let c1 = [], p1 = {key:1};
     var vn1 = h('div', p1, c1);
     //WIDGET
-    let _2_index = c1.length;
-    c1.push(null);
     let def3;
     let w4 = 4 in context.__owl__.cmap ? context.__owl__.children[context.__owl__.cmap[4]] : false;
+    let _2_index = c1.length;
+    c1.push(null);
     let props4 = {};
     if (w4 && w4.__owl__.renderPromise && !w4.__owl__.vnode) {
         if (utils.shallowEqual(props4, w4.__owl__.renderProps)) {
@@ -232,10 +476,10 @@ exports[`other directives with t-widget t-on with handler bound to argument 1`]
     let c1 = [], p1 = {key:1};
     var vn1 = h('div', p1, c1);
     //WIDGET
-    let _2_index = c1.length;
-    c1.push(null);
     let def3;
     let w4 = 4 in context.__owl__.cmap ? context.__owl__.children[context.__owl__.cmap[4]] : false;
+    let _2_index = c1.length;
+    c1.push(null);
     let props4 = {};
     if (w4 && w4.__owl__.renderPromise && !w4.__owl__.vnode) {
         if (utils.shallowEqual(props4, w4.__owl__.renderProps)) {
@@ -272,10 +516,10 @@ exports[`other directives with t-widget t-on with handler bound to empty object
     let c1 = [], p1 = {key:1};
     var vn1 = h('div', p1, c1);
     //WIDGET
-    let _2_index = c1.length;
-    c1.push(null);
     let def3;
     let w4 = 4 in context.__owl__.cmap ? context.__owl__.children[context.__owl__.cmap[4]] : false;
+    let _2_index = c1.length;
+    c1.push(null);
     let props4 = {};
     if (w4 && w4.__owl__.renderPromise && !w4.__owl__.vnode) {
         if (utils.shallowEqual(props4, w4.__owl__.renderProps)) {
@@ -312,10 +556,10 @@ exports[`other directives with t-widget t-on with handler bound to empty object
     let c1 = [], p1 = {key:1};
     var vn1 = h('div', p1, c1);
     //WIDGET
-    let _2_index = c1.length;
-    c1.push(null);
     let def3;
     let w4 = 4 in context.__owl__.cmap ? context.__owl__.children[context.__owl__.cmap[4]] : false;
+    let _2_index = c1.length;
+    c1.push(null);
     let props4 = {};
     if (w4 && w4.__owl__.renderPromise && !w4.__owl__.vnode) {
         if (utils.shallowEqual(props4, w4.__owl__.renderProps)) {
@@ -352,10 +596,10 @@ exports[`other directives with t-widget t-on with handler bound to object 1`] =
     let c1 = [], p1 = {key:1};
     var vn1 = h('div', p1, c1);
     //WIDGET
-    let _2_index = c1.length;
-    c1.push(null);
     let def3;
     let w4 = 4 in context.__owl__.cmap ? context.__owl__.children[context.__owl__.cmap[4]] : false;
+    let _2_index = c1.length;
+    c1.push(null);
     let props4 = {};
     if (w4 && w4.__owl__.renderPromise && !w4.__owl__.vnode) {
         if (utils.shallowEqual(props4, w4.__owl__.renderProps)) {
@@ -372,7 +616,7 @@ exports[`other directives with t-widget t-on with handler bound to object 1`] =
         w4 = new W4(owner, props4);
         context.__owl__.cmap[4] = w4.__owl__.id;
         def3 = w4._prepare();
-        def3 = def3.then(vnode=>{vnode.data.hook = {create(_, vn){vn.elm.addEventListener('ev', owner['onEv'].bind(owner, {val: 3}));}};let pvnode=h(vnode.sel, {key: 4, hook: {insert(vn) {let nvn=w4._mount(vnode, pvnode.elm);pvnode.elm=nvn.elm;},remove() {},destroy(vn) {w4.destroy();}}});c1[_2_index]=pvnode;w4.__owl__.pvnode = pvnode;});
+        def3 = def3.then(vnode=>{vnode.data.hook = {create(_, vn){vn.elm.addEventListener('ev', owner['onEv'].bind(owner, {val:3}));}};let pvnode=h(vnode.sel, {key: 4, hook: {insert(vn) {let nvn=w4._mount(vnode, pvnode.elm);pvnode.elm=nvn.elm;},remove() {},destroy(vn) {w4.destroy();}}});c1[_2_index]=pvnode;w4.__owl__.pvnode = pvnode;});
     } else {
         def3 = def3 || w4._updateProps(props4, extra.forceUpdate, extra.patchQueue);
         def3 = def3.then(()=>{if (w4.__owl__.isDestroyed) {return};let pvnode=w4.__owl__.pvnode;c1[_2_index]=pvnode;});
@@ -392,10 +636,10 @@ exports[`other directives with t-widget t-on with prevent and self modifiers (or
     let c1 = [], p1 = {key:1};
     var vn1 = h('div', p1, c1);
     //WIDGET
-    let _2_index = c1.length;
-    c1.push(null);
     let def3;
     let w4 = 4 in context.__owl__.cmap ? context.__owl__.children[context.__owl__.cmap[4]] : false;
+    let _2_index = c1.length;
+    c1.push(null);
     let props4 = {};
     if (w4 && w4.__owl__.renderPromise && !w4.__owl__.vnode) {
         if (utils.shallowEqual(props4, w4.__owl__.renderProps)) {
@@ -432,10 +676,10 @@ exports[`other directives with t-widget t-on with self and prevent modifiers (or
     let c1 = [], p1 = {key:1};
     var vn1 = h('div', p1, c1);
     //WIDGET
-    let _2_index = c1.length;
-    c1.push(null);
     let def3;
     let w4 = 4 in context.__owl__.cmap ? context.__owl__.children[context.__owl__.cmap[4]] : false;
+    let _2_index = c1.length;
+    c1.push(null);
     let props4 = {};
     if (w4 && w4.__owl__.renderPromise && !w4.__owl__.vnode) {
         if (utils.shallowEqual(props4, w4.__owl__.renderProps)) {
@@ -472,10 +716,10 @@ exports[`other directives with t-widget t-on with self modifier 1`] = `
     let c1 = [], p1 = {key:1};
     var vn1 = h('div', p1, c1);
     //WIDGET
-    let _2_index = c1.length;
-    c1.push(null);
     let def3;
     let w4 = 4 in context.__owl__.cmap ? context.__owl__.children[context.__owl__.cmap[4]] : false;
+    let _2_index = c1.length;
+    c1.push(null);
     let props4 = {};
     if (w4 && w4.__owl__.renderPromise && !w4.__owl__.vnode) {
         if (utils.shallowEqual(props4, w4.__owl__.renderProps)) {
@@ -512,10 +756,10 @@ exports[`other directives with t-widget t-on with stop and/or prevent modifiers
     let c1 = [], p1 = {key:1};
     var vn1 = h('div', p1, c1);
     //WIDGET
-    let _2_index = c1.length;
-    c1.push(null);
     let def3;
     let w4 = 4 in context.__owl__.cmap ? context.__owl__.children[context.__owl__.cmap[4]] : false;
+    let _2_index = c1.length;
+    c1.push(null);
     let props4 = {};
     if (w4 && w4.__owl__.renderPromise && !w4.__owl__.vnode) {
         if (utils.shallowEqual(props4, w4.__owl__.renderProps)) {
@@ -553,10 +797,10 @@ exports[`random stuff/miscellaneous snapshotting compiled code 1`] = `
     var vn1 = h('div', p1, c1);
     //WIDGET
     let key5 = 'somestring';
-    let _2_index = c1.length;
-    c1.push(null);
     let def3;
     let w4 = key5 in context.__owl__.cmap ? context.__owl__.children[context.__owl__.cmap[key5]] : false;
+    let _2_index = c1.length;
+    c1.push(null);
     let props4 = {flag:context['state'].flag};
     if (w4 && w4.__owl__.renderPromise && !w4.__owl__.vnode) {
         if (utils.shallowEqual(props4, w4.__owl__.renderProps)) {
@@ -582,3 +826,211 @@ exports[`random stuff/miscellaneous snapshotting compiled code 1`] = `
     return vn1;
 }"
 `;
+
+exports[`t-model directive .lazy modifier 1`] = `
+"function anonymous(context,extra
+) {
+    var h = this.utils.h;
+    let c1 = [], p1 = {key:1};
+    var vn1 = h('div', p1, c1);
+    let c2 = [], p2 = {key:2,on:{}};
+    var vn2 = h('input', p2, c2);
+    c1.push(vn2);
+    p2.props = {value: context.state['text']};
+    extra.handlers['change' + 2] = extra.handlers['change' + 2] || ((ev) => {context.state['text'] = ev.target.value});
+    p2.on['change'] = extra.handlers['change' + 2];
+    let c3 = [], p3 = {key:3};
+    var vn3 = h('span', p3, c3);
+    c1.push(vn3);
+    var _4 = context['state'].text;
+    if (_4 || _4 === 0) {
+        c3.push({text: _4});
+    }
+    return vn1;
+}"
+`;
+
+exports[`t-model directive basic use, on an input 1`] = `
+"function anonymous(context,extra
+) {
+    var h = this.utils.h;
+    let c1 = [], p1 = {key:1};
+    var vn1 = h('div', p1, c1);
+    let c2 = [], p2 = {key:2,on:{}};
+    var vn2 = h('input', p2, c2);
+    c1.push(vn2);
+    p2.props = {value: context.state['text']};
+    extra.handlers['input' + 2] = extra.handlers['input' + 2] || ((ev) => {context.state['text'] = ev.target.value});
+    p2.on['input'] = extra.handlers['input' + 2];
+    let c3 = [], p3 = {key:3};
+    var vn3 = h('span', p3, c3);
+    c1.push(vn3);
+    var _4 = context['state'].text;
+    if (_4 || _4 === 0) {
+        c3.push({text: _4});
+    }
+    return vn1;
+}"
+`;
+
+exports[`t-model directive on a select 1`] = `
+"function anonymous(context,extra
+) {
+    var h = this.utils.h;
+    let c1 = [], p1 = {key:1};
+    var vn1 = h('div', p1, c1);
+    let c2 = [], p2 = {key:2,on:{}};
+    var vn2 = h('select', p2, c2);
+    c1.push(vn2);
+    p2.props = {value: context.state['color']};
+    extra.handlers['change' + 2] = extra.handlers['change' + 2] || ((ev) => {context.state['color'] = ev.target.value});
+    p2.on['change'] = extra.handlers['change' + 2];
+    var _3 = '';
+    let c4 = [], p4 = {key:4,attrs:{value: _3}};
+    var vn4 = h('option', p4, c4);
+    c2.push(vn4);
+    c4.push({text: \`Please select one\`});
+    var _5 = 'red';
+    let c6 = [], p6 = {key:6,attrs:{value: _5}};
+    var vn6 = h('option', p6, c6);
+    c2.push(vn6);
+    c6.push({text: \`Red\`});
+    var _7 = 'blue';
+    let c8 = [], p8 = {key:8,attrs:{value: _7}};
+    var vn8 = h('option', p8, c8);
+    c2.push(vn8);
+    c8.push({text: \`Blue\`});
+    let c9 = [], p9 = {key:9};
+    var vn9 = h('span', p9, c9);
+    c1.push(vn9);
+    c9.push({text: \`Choice: \`});
+    var _10 = context['state'].color;
+    if (_10 || _10 === 0) {
+        c9.push({text: _10});
+    }
+    return vn1;
+}"
+`;
+
+exports[`t-model directive on an input type=radio 1`] = `
+"function anonymous(context,extra
+) {
+    var h = this.utils.h;
+    let c1 = [], p1 = {key:1};
+    var vn1 = h('div', p1, c1);
+    var _2 = 'radio';
+    var _3 = 'one';
+    var _4 = 'One';
+    let c5 = [], p5 = {key:5,attrs:{type: _2,id: _3,value: _4},on:{}};
+    var vn5 = h('input', p5, c5);
+    c1.push(vn5);
+    p5.props = {checked:context.state['choice'] === 'One'};
+    extra.handlers['click' + 5] = extra.handlers['click' + 5] || ((ev) => {context.state['choice'] = ev.target.value});
+    p5.on['click'] = extra.handlers['click' + 5];
+    var _6 = 'radio';
+    var _7 = 'two';
+    var _8 = 'Two';
+    let c9 = [], p9 = {key:9,attrs:{type: _6,id: _7,value: _8},on:{}};
+    var vn9 = h('input', p9, c9);
+    c1.push(vn9);
+    p9.props = {checked:context.state['choice'] === 'Two'};
+    extra.handlers['click' + 9] = extra.handlers['click' + 9] || ((ev) => {context.state['choice'] = ev.target.value});
+    p9.on['click'] = extra.handlers['click' + 9];
+    let c10 = [], p10 = {key:10};
+    var vn10 = h('span', p10, c10);
+    c1.push(vn10);
+    c10.push({text: \`Choice: \`});
+    var _11 = context['state'].choice;
+    if (_11 || _11 === 0) {
+        c10.push({text: _11});
+    }
+    return vn1;
+}"
+`;
+
+exports[`t-model directive on an input, type=checkbox 1`] = `
+"function anonymous(context,extra
+) {
+    var h = this.utils.h;
+    let c1 = [], p1 = {key:1};
+    var vn1 = h('div', p1, c1);
+    var _2 = 'checkbox';
+    let c3 = [], p3 = {key:3,attrs:{type: _2},on:{}};
+    var vn3 = h('input', p3, c3);
+    c1.push(vn3);
+    p3.props = {checked: context.state['flag']};
+    extra.handlers['input' + 3] = extra.handlers['input' + 3] || ((ev) => {context.state['flag'] = ev.target.checked});
+    p3.on['input'] = extra.handlers['input' + 3];
+    let c4 = [], p4 = {key:4};
+    var vn4 = h('span', p4, c4);
+    c1.push(vn4);
+    if (context['state'].flag) {
+        c4.push({text: \`yes\`});
+    }
+    else {
+        c4.push({text: \`no\`});
+    }
+    return vn1;
+}"
+`;
+
+exports[`t-slot directive can define and call slots 1`] = `
+"function anonymous(context,extra
+) {
+    let utils = this.utils;
+    let QWeb = this.constructor;
+    let owner = context;
+    var h = this.utils.h;
+    let c1 = [], p1 = {key:1};
+    var vn1 = h('div', p1, c1);
+    //WIDGET
+    let def3;
+    let w4 = 4 in context.__owl__.cmap ? context.__owl__.children[context.__owl__.cmap[4]] : false;
+    let _2_index = c1.length;
+    c1.push(null);
+    let props4 = {};
+    if (w4 && w4.__owl__.renderPromise && !w4.__owl__.vnode) {
+        if (utils.shallowEqual(props4, w4.__owl__.renderProps)) {
+            def3 = w4.__owl__.renderPromise;
+        } else {
+            w4.destroy();
+            w4 = false;
+        }
+    }
+    if (!w4) {
+        let widgetKey4 = \`Dialog\`;
+        let W4 = context.widgets && context.widgets[widgetKey4] || QWeb.widgets[widgetKey4];
+        if (!W4) {throw new Error('Cannot find the definition of widget \\"' + widgetKey4 + '\\"')}
+        w4 = new W4(owner, props4);
+        context.__owl__.cmap[4] = w4.__owl__.id;
+        w4.__owl__.slotId = 1;
+        def3 = w4._prepare();
+        def3 = def3.then(vnode=>{let pvnode=h(vnode.sel, {key: 4, hook: {insert(vn) {let nvn=w4._mount(vnode, pvnode.elm);pvnode.elm=nvn.elm;},remove() {},destroy(vn) {w4.destroy();}}});c1[_2_index]=pvnode;w4.__owl__.pvnode = pvnode;});
+    } else {
+        def3 = def3 || w4._updateProps(props4, extra.forceUpdate, extra.patchQueue);
+        def3 = def3.then(()=>{if (w4.__owl__.isDestroyed) {return};let pvnode=w4.__owl__.pvnode;c1[_2_index]=pvnode;});
+    }
+    extra.promises.push(def3);
+    return vn1;
+}"
+`;
+
+exports[`t-slot directive can define and call slots 2`] = `
+"function anonymous(context,extra
+) {
+    var h = this.utils.h;
+    let c1 = [], p1 = {key:1};
+    var vn1 = h('div', p1, c1);
+    let c2 = [], p2 = {key:2};
+    var vn2 = h('div', p2, c2);
+    c1.push(vn2);
+    const slot3 = this.slots[context.__owl__.slotId + '_' + 'header'];
+    c2.push(slot3(context.__owl__.parent, extra));
+    let c4 = [], p4 = {key:4};
+    var vn4 = h('div', p4, c4);
+    c1.push(vn4);
+    const slot5 = this.slots[context.__owl__.slotId + '_' + 'footer'];
+    c4.push(slot5(context.__owl__.parent, extra));
+    return vn1;
+}"
+`;

tests/__snapshots__/qweb.test.ts.snap

@@ -4,7 +4,7 @@ exports[`attributes class and t-attf-class with ternary operation 1`] = `
 "function anonymous(context,extra
 ) {
     var h = this.utils.h;
-    var _1 = 'hello ' + (context['value'] ? 'world' : '');
+    var _1 = 'hello ' + (context['value']?'world':'');
     let c2 = [], p2 = {key:2,attrs:{class: _1}};
     var vn2 = h('div', p2, c2);
     return vn2;
@@ -70,7 +70,7 @@ exports[`attributes format expression 1`] = `
 "function anonymous(context,extra
 ) {
     var h = this.utils.h;
-    var _1 = (context['value'] + 37);
+    var _1 = (context['value']+37);
     let c2 = [], p2 = {key:2,attrs:{foo: _1}};
     var vn2 = h('div', p2, c2);
     return vn2;
@@ -81,7 +81,7 @@ exports[`attributes format expression, other format 1`] = `
 "function anonymous(context,extra
 ) {
     var h = this.utils.h;
-    var _1 = (context['value'] + 37);
+    var _1 = (context['value']+37);
     let c2 = [], p2 = {key:2,attrs:{foo: _1}};
     var vn2 = h('div', p2, c2);
     return vn2;
@@ -127,7 +127,7 @@ exports[`attributes from object variables set previously 1`] = `
     var h = this.utils.h;
     let c1 = [], p1 = {key:1};
     var vn1 = h('div', p1, c1);
-    var _2 = {a: 'b'};
+    var _2 = {a:'b'};
     var _3 = _2.a;
     let c4 = [], p4 = {key:4,attrs:{class: _3}};
     var vn4 = h('span', p4, c4);
@@ -223,7 +223,7 @@ exports[`attributes t-att-class with object 1`] = `
 ) {
     var h = this.utils.h;
     var _1 = 'static';
-    var _3 = this.utils.objectToAttrString({a: context['b'],c: context['d'],e: context['f']});
+    var _3 = this.utils.objectToAttrString({a:context['b'],c:context['d'],e:context['f']});
     var _2 = 'static' + (_3 ? ' ' + _3 : '');
     let c4 = [], p4 = {key:4,attrs:{class: _2}};
     var vn4 = h('div', p4, c4);
@@ -246,7 +246,7 @@ exports[`attributes tuple literal 1`] = `
 "function anonymous(context,extra
 ) {
     var h = this.utils.h;
-    var _1 = ['foo', 'bar'];
+    var _1 = ['foo','bar'];
     let c2 = [], p2 = {key:2,attrs:{}};
     if (_1 instanceof Array) {
         p2.attrs[_1[0]] = _1[1];
@@ -303,7 +303,7 @@ exports[`debugging t-log 1`] = `
     let c1 = [], p1 = {key:1};
     var vn1 = h('div', p1, c1);
     var _2 = 42;
-    console.log(_2 + 3)
+    console.log(_2+3)
     return vn1;
 }"
 `;
@@ -317,14 +317,15 @@ exports[`foreach does not pollute the rendering context 1`] = `
     var vn1 = h('div', p1, c1);
     var _2 = [1];
     if (!_2) { throw new Error('QWeb error: Invalid loop expression')}
-    if (typeof _2 === 'number') { _2 = Array.from(Array(_2).keys())}
+    var _3 = _4 = _2;
-    var _3 = _2 instanceof Array ? _2 : Object.keys(_2);
+    if (!(_2 instanceof Array)) {
+        _3 = Object.keys(_2);
+        _4 = Object.values(_2);
+    }
     var _length3 = _3.length;
-    var _4 = _2 instanceof Array ? _2 : Object.values(_2);
     for (let i = 0; i < _length3; i++) {
         context.item_first = i === 0;
         context.item_last = i === _length3 - 1;
-        context.item_parity = i % 2 === 0 ? 'even' : 'odd';
         context.item_index = i;
         context.item = _3[i];
         context.item_value = _4[i];
@@ -344,16 +345,17 @@ exports[`foreach iterate on items (on a element node) 1`] = `
     var h = this.utils.h;
     let c1 = [], p1 = {key:1};
     var vn1 = h('div', p1, c1);
-    var _2 = [1, 2];
+    var _2 = [1,2];
     if (!_2) { throw new Error('QWeb error: Invalid loop expression')}
-    if (typeof _2 === 'number') { _2 = Array.from(Array(_2).keys())}
+    var _3 = _4 = _2;
-    var _3 = _2 instanceof Array ? _2 : Object.keys(_2);
+    if (!(_2 instanceof Array)) {
+        _3 = Object.keys(_2);
+        _4 = Object.values(_2);
+    }
     var _length3 = _3.length;
-    var _4 = _2 instanceof Array ? _2 : Object.values(_2);
     for (let i = 0; i < _length3; i++) {
         context.item_first = i === 0;
         context.item_last = i === _length3 - 1;
-        context.item_parity = i % 2 === 0 ? 'even' : 'odd';
         context.item_index = i;
         context.item = _3[i];
         context.item_value = _4[i];
@@ -376,16 +378,17 @@ exports[`foreach iterate on items 1`] = `
     var h = this.utils.h;
     let c1 = [], p1 = {key:1};
     var vn1 = h('div', p1, c1);
-    var _2 = [3, 2, 1];
+    var _2 = [3,2,1];
     if (!_2) { throw new Error('QWeb error: Invalid loop expression')}
-    if (typeof _2 === 'number') { _2 = Array.from(Array(_2).keys())}
+    var _3 = _4 = _2;
-    var _3 = _2 instanceof Array ? _2 : Object.keys(_2);
+    if (!(_2 instanceof Array)) {
+        _3 = Object.keys(_2);
+        _4 = Object.values(_2);
+    }
     var _length3 = _3.length;
-    var _4 = _2 instanceof Array ? _2 : Object.values(_2);
     for (let i = 0; i < _length3; i++) {
         context.item_first = i === 0;
         context.item_last = i === _length3 - 1;
-        context.item_parity = i % 2 === 0 ? 'even' : 'odd';
         context.item_index = i;
         context.item = _3[i];
         context.item_value = _4[i];
@@ -419,60 +422,15 @@ exports[`foreach iterate, dict param 1`] = `
     var vn1 = h('div', p1, c1);
     var _2 = context['value'];
     if (!_2) { throw new Error('QWeb error: Invalid loop expression')}
-    if (typeof _2 === 'number') { _2 = Array.from(Array(_2).keys())}
+    var _3 = _4 = _2;
-    var _3 = _2 instanceof Array ? _2 : Object.keys(_2);
+    if (!(_2 instanceof Array)) {
-    var _length3 = _3.length;
+        _3 = Object.keys(_2);
-    var _4 = _2 instanceof Array ? _2 : Object.values(_2);
+        _4 = Object.values(_2);
-    for (let i = 0; i < _length3; i++) {
-        context.item_first = i === 0;
-        context.item_last = i === _length3 - 1;
-        context.item_parity = i % 2 === 0 ? 'even' : 'odd';
-        context.item_index = i;
-        context.item = _3[i];
-        context.item_value = _4[i];
-        c1.push({text: \` [\`});
-        var _5 = context['item_index'];
-        if (_5 || _5 === 0) {
-            c1.push({text: _5});
-        }
-        c1.push({text: \`: \`});
-        var _6 = context['item'];
-        if (_6 || _6 === 0) {
-            c1.push({text: _6});
-        }
-        c1.push({text: \` \`});
-        var _7 = context['item_value'];
-        if (_7 || _7 === 0) {
-            c1.push({text: _7});
-        }
-        c1.push({text: \` - \`});
-        var _8 = context['item_parity'];
-        if (_8 || _8 === 0) {
-            c1.push({text: _8});
-        }
-        c1.push({text: \`] \`});
     }
-    return vn1;
-}"
-`;
-
-exports[`foreach iterate, integer param 1`] = `
-"function anonymous(context,extra
-) {
-    context = Object.create(context);
-    var h = this.utils.h;
-    let c1 = [], p1 = {key:1};
-    var vn1 = h('div', p1, c1);
-    var _2 = 3;
-    if (!_2) { throw new Error('QWeb error: Invalid loop expression')}
-    if (typeof _2 === 'number') { _2 = Array.from(Array(_2).keys())}
-    var _3 = _2 instanceof Array ? _2 : Object.keys(_2);
     var _length3 = _3.length;
-    var _4 = _2 instanceof Array ? _2 : Object.values(_2);
     for (let i = 0; i < _length3; i++) {
         context.item_first = i === 0;
         context.item_last = i === _length3 - 1;
-        context.item_parity = i % 2 === 0 ? 'even' : 'odd';
         context.item_index = i;
         context.item = _3[i];
         context.item_value = _4[i];
@@ -504,16 +462,17 @@ exports[`foreach iterate, position 1`] = `
     var h = this.utils.h;
     let c1 = [], p1 = {key:1};
     var vn1 = h('div', p1, c1);
-    var _2 = 5;
+    var _2 = Array(5);
     if (!_2) { throw new Error('QWeb error: Invalid loop expression')}
-    if (typeof _2 === 'number') { _2 = Array.from(Array(_2).keys())}
+    var _3 = _4 = _2;
-    var _3 = _2 instanceof Array ? _2 : Object.keys(_2);
+    if (!(_2 instanceof Array)) {
+        _3 = Object.keys(_2);
+        _4 = Object.values(_2);
+    }
     var _length3 = _3.length;
-    var _4 = _2 instanceof Array ? _2 : Object.values(_2);
     for (let i = 0; i < _length3; i++) {
         context.elem_first = i === 0;
         context.elem_last = i === _length3 - 1;
-        context.elem_parity = i % 2 === 0 ? 'even' : 'odd';
         context.elem_index = i;
         context.elem = _3[i];
         context.elem_value = _4[i];
@@ -525,7 +484,7 @@ exports[`foreach iterate, position 1`] = `
             c1.push({text: \` last\`});
         }
         c1.push({text: \` (\`});
-        var _5 = context['elem_parity'];
+        var _5 = context['elem_index'];
         if (_5 || _5 === 0) {
             c1.push({text: _5});
         }
@@ -542,16 +501,17 @@ exports[`foreach warn if no key in some case 1`] = `
     var h = this.utils.h;
     let c1 = [], p1 = {key:1};
     var vn1 = h('div', p1, c1);
-    var _2 = [1, 2];
+    var _2 = [1,2];
     if (!_2) { throw new Error('QWeb error: Invalid loop expression')}
-    if (typeof _2 === 'number') { _2 = Array.from(Array(_2).keys())}
+    var _3 = _4 = _2;
-    var _3 = _2 instanceof Array ? _2 : Object.keys(_2);
+    if (!(_2 instanceof Array)) {
+        _3 = Object.keys(_2);
+        _4 = Object.values(_2);
+    }
     var _length3 = _3.length;
-    var _4 = _2 instanceof Array ? _2 : Object.values(_2);
     for (let i = 0; i < _length3; i++) {
         context.item_first = i === 0;
         context.item_last = i === _length3 - 1;
-        context.item_parity = i % 2 === 0 ? 'even' : 'odd';
         context.item_index = i;
         context.item = _3[i];
         context.item_value = _4[i];
@@ -605,14 +565,15 @@ exports[`misc global 1`] = `
     var vn1 = h('div', p1, c1);
     var _2 = [4,5,6];
     if (!_2) { throw new Error('QWeb error: Invalid loop expression')}
-    if (typeof _2 === 'number') { _2 = Array.from(Array(_2).keys())}
+    var _3 = _4 = _2;
-    var _3 = _2 instanceof Array ? _2 : Object.keys(_2);
+    if (!(_2 instanceof Array)) {
+        _3 = Object.keys(_2);
+        _4 = Object.values(_2);
+    }
     var _length3 = _3.length;
-    var _4 = _2 instanceof Array ? _2 : Object.values(_2);
     for (let i = 0; i < _length3; i++) {
         context.value_first = i === 0;
         context.value_last = i === _length3 - 1;
-        context.value_parity = i % 2 === 0 ? 'even' : 'odd';
         context.value_index = i;
         context.value = _3[i];
         context.value_value = _4[i];
@@ -624,13 +585,13 @@ exports[`misc global 1`] = `
             c5.push({text: _6});
         }
         {
-            let _11 = 'bbb'
+            let _11 = 'bbb';
             var _13 = 'agüero';
             let c14 = [], p14 = {key:14,attrs:{\\"falló\\": _13},on:{}};
             var vn14 = h('Año', p14, c14);
             c1.push(vn14);
             {
-                let _15 = 'aaa'
+                let _15 = 'aaa';
                 let c16 = [], p16 = {key:16,on:{}};
                 var vn16 = h('span', p16, c16);
                 c14.push(vn16);
@@ -650,16 +611,13 @@ exports[`misc global 1`] = `
                 c17.push({text: \`foo default\`});
             }
             var _19 = 'bbb';
-            {
+            let c20 = [], p20 = {key:20,on:{}};
-                let _19 = 'bbb'
+            var vn20 = h('span', p20, c20);
-                let c20 = [], p20 = {key:20,on:{}};
+            c14.push(vn20);
-                var vn20 = h('span', p20, c20);
+            if (_19 || _19 === 0) {
-                c14.push(vn20);
+                c20.push({text: _19});
-                if (_19 || _19 === 0) {
+            } else {
-                    c20.push({text: _19});
+                c20.push({text: \`foo default\`});
-                } else {
-                    c20.push({text: \`foo default\`});
-                }
             }
         }
     }
@@ -768,6 +726,18 @@ exports[`static templates empty div 1`] = `
 }"
 `;
 
+exports[`static templates simple dynamic value 1`] = `
+"function anonymous(context,extra
+) {
+    var h = this.utils.h;
+    var _1 = context['text'];
+    if (_1 || _1 === 0) {
+        var vn2 = {text: _1};
+    }
+    return vn2;
+}"
+`;
+
 exports[`static templates simple string 1`] = `
 "function anonymous(context,extra
 ) {
@@ -777,6 +747,19 @@ exports[`static templates simple string 1`] = `
 }"
 `;
 
+exports[`static templates simple string, with some dynamic value 1`] = `
+"function anonymous(context,extra
+) {
+    var h = this.utils.h;
+    var vn1 = {text: \`hello \`};
+    var _2 = context['text'];
+    if (_2 || _2 === 0) {
+        vn1.text += _2;
+    }
+    return vn1;
+}"
+`;
+
 exports[`t-call (template calling basic caller 1`] = `
 "function anonymous(context,extra
 ) {
@@ -795,11 +778,8 @@ exports[`t-call (template calling inherit context 1`] = `
     let c1 = [], p1 = {key:1};
     var vn1 = h('div', p1, c1);
     var _2 = 1;
-    {
+    if (_2 || _2 === 0) {
-        let _2 = 1
+        c1.push({text: _2});
-        if (_2 || _2 === 0) {
-            c1.push({text: _2});
-        }
     }
     return vn1;
 }"
@@ -812,7 +792,7 @@ exports[`t-call (template calling scoped parameters 1`] = `
     let c1 = [], p1 = {key:1};
     var vn1 = h('div', p1, c1);
     {
-        let _2 = 42
+        let _2 = 42;
         c1.push({text: \`ok\`});
     }
     var _3 = context['foo'];
@@ -839,7 +819,7 @@ exports[`t-call (template calling with unused setbody 1`] = `
 ) {
     var h = this.utils.h;
     {
-        let _1 = 3
+        let _1 = 3;
         let c2 = [], p2 = {key:2};
         var vn2 = h('div', p2, c2);
         c2.push({text: \`ok\`});
@@ -866,7 +846,7 @@ exports[`t-call (template calling with used set body 1`] = `
     let c1 = [], p1 = {key:1};
     var vn1 = h('span', p1, c1);
     {
-        let _2 = 'ok'
+        let _2 = 'ok';
         if (_2 || _2 === 0) {
             c1.push({text: _2});
         }
@@ -955,13 +935,13 @@ exports[`t-if boolean value condition elif 1`] = `
     var h = this.utils.h;
     let c1 = [], p1 = {key:1};
     var vn1 = h('div', p1, c1);
-    if (context['color'] == 'black') {
+    if (context['color']=='black') {
         c1.push({text: \`black pearl\`});
     }
-    else if (context['color'] == 'yellow') {
+    else if (context['color']=='yellow') {
         c1.push({text: \`yellow submarine\`});
     }
-    else if (context['color'] == 'red') {
+    else if (context['color']=='red') {
         c1.push({text: \`red is dead\`});
     }
     else {
@@ -1064,28 +1044,28 @@ exports[`t-if can use some boolean operators in expressions 1`] = `
     var h = this.utils.h;
     let c1 = [], p1 = {key:1};
     var vn1 = h('div', p1, c1);
-    if (context['cond1'] && context['cond2']) {
+    if (context['cond1']&&context['cond2']) {
         c1.push({text: \`and\`});
     }
-    if (context['cond1'] && context['cond3']) {
+    if (context['cond1']&&context['cond3']) {
         c1.push({text: \`nope\`});
     }
-    if (context['cond1'] || context['cond3']) {
+    if (context['cond1']||context['cond3']) {
         c1.push({text: \`or\`});
     }
-    if (context['cond3'] || context['cond4']) {
+    if (context['cond3']||context['cond4']) {
         c1.push({text: \`nope\`});
     }
-    if (context['m'] > 3) {
+    if (context['m']>3) {
         c1.push({text: \`mgt\`});
     }
-    if (context['n'] > 3) {
+    if (context['n']>3) {
         c1.push({text: \`ngt\`});
     }
-    if (context['m'] < 3) {
+    if (context['m']<3) {
         c1.push({text: \`mlt\`});
     }
-    if (context['n'] < 3) {
+    if (context['n']<3) {
         c1.push({text: \`nlt\`});
     }
     return vn1;
@@ -1115,14 +1095,15 @@ exports[`t-key t-key directive in a list 1`] = `
     var vn1 = h('ul', p1, c1);
     var _2 = context['beers'];
     if (!_2) { throw new Error('QWeb error: Invalid loop expression')}
-    if (typeof _2 === 'number') { _2 = Array.from(Array(_2).keys())}
+    var _3 = _4 = _2;
-    var _3 = _2 instanceof Array ? _2 : Object.keys(_2);
+    if (!(_2 instanceof Array)) {
+        _3 = Object.keys(_2);
+        _4 = Object.values(_2);
+    }
     var _length3 = _3.length;
-    var _4 = _2 instanceof Array ? _2 : Object.values(_2);
     for (let i = 0; i < _length3; i++) {
         context.beer_first = i === 0;
         context.beer_last = i === _length3 - 1;
-        context.beer_parity = i % 2 === 0 ? 'even' : 'odd';
         context.beer_index = i;
         context.beer = _3[i];
         context.beer_value = _4[i];
@@ -1215,14 +1196,15 @@ exports[`t-on can bind handlers with loop variable as argument 1`] = `
     var vn1 = h('ul', p1, c1);
     var _2 = ['someval'];
     if (!_2) { throw new Error('QWeb error: Invalid loop expression')}
-    if (typeof _2 === 'number') { _2 = Array.from(Array(_2).keys())}
+    var _3 = _4 = _2;
-    var _3 = _2 instanceof Array ? _2 : Object.keys(_2);
+    if (!(_2 instanceof Array)) {
+        _3 = Object.keys(_2);
+        _4 = Object.values(_2);
+    }
     var _length3 = _3.length;
-    var _4 = _2 instanceof Array ? _2 : Object.values(_2);
     for (let i = 0; i < _length3; i++) {
         context.action_first = i === 0;
         context.action_last = i === _length3 - 1;
-        context.action_parity = i % 2 === 0 ? 'even' : 'odd';
         context.action_index = i;
         context.action = _3[i];
         context.action_value = _4[i];
@@ -1252,7 +1234,7 @@ exports[`t-on can bind handlers with object arguments 1`] = `
     if (!context['add']) {
         throw new Error('Missing handler \\\\'' + 'add' + \`\\\\' when evaluating template 'test'\`)
     }
-    p1.on['click'] = context['add'].bind(owner, {val: 5});
+    p1.on['click'] = context['add'].bind(owner, {val:5});
     c1.push({text: \`Click\`});
     return vn1;
 }"
@@ -1543,14 +1525,15 @@ exports[`t-ref refs in a loop 1`] = `
     var vn1 = h('div', p1, c1);
     var _2 = context['items'];
     if (!_2) { throw new Error('QWeb error: Invalid loop expression')}
-    if (typeof _2 === 'number') { _2 = Array.from(Array(_2).keys())}
+    var _3 = _4 = _2;
-    var _3 = _2 instanceof Array ? _2 : Object.keys(_2);
+    if (!(_2 instanceof Array)) {
+        _3 = Object.keys(_2);
+        _4 = Object.values(_2);
+    }
     var _length3 = _3.length;
-    var _4 = _2 instanceof Array ? _2 : Object.values(_2);
     for (let i = 0; i < _length3; i++) {
         context.item_first = i === 0;
         context.item_last = i === _length3 - 1;
-        context.item_parity = i % 2 === 0 ? 'even' : 'odd';
         context.item_index = i;
         context.item = _3[i];
         context.item_value = _4[i];
@@ -1578,7 +1561,7 @@ exports[`t-set evaluate value expression 1`] = `
     var h = this.utils.h;
     let c1 = [], p1 = {key:1};
     var vn1 = h('div', p1, c1);
-    var _2 = 1 + 2;
+    var _2 = 1+2;
     if (_2 || _2 === 0) {
         c1.push({text: _2});
     }
@@ -1592,7 +1575,7 @@ exports[`t-set evaluate value expression, part 2 1`] = `
     var h = this.utils.h;
     let c1 = [], p1 = {key:1};
     var vn1 = h('div', p1, c1);
-    var _2 = context['somevariable'] + 2;
+    var _2 = context['somevariable']+2;
     if (_2 || _2 === 0) {
         c1.push({text: _2});
     }
@@ -1668,7 +1651,7 @@ exports[`t-set t-set and t-if 1`] = `
     let c1 = [], p1 = {key:1};
     var vn1 = h('div', p1, c1);
     var _2 = context['value'];
-    if (_2 === 'ok') {
+    if (_2==='ok') {
         c1.push({text: \`grimbergen\`});
     }
     return vn1;
@@ -1681,7 +1664,7 @@ exports[`t-set t-set evaluates an expression only once 1`] = `
     var h = this.utils.h;
     let c1 = [], p1 = {key:1};
     var vn1 = h('div', p1, c1);
-    var _2 = context['value'] + ' artois';
+    var _2 = context['value']+' artois';
     if (_2 || _2 === 0) {
         c1.push({text: _2});
     }
@@ -1702,14 +1685,15 @@ exports[`t-set t-set should reuse variable if possible 1`] = `
     var _2 = 1;
     var _3 = context['list'];
     if (!_3) { throw new Error('QWeb error: Invalid loop expression')}
-    if (typeof _3 === 'number') { _3 = Array.from(Array(_3).keys())}
+    var _4 = _5 = _3;
-    var _4 = _3 instanceof Array ? _3 : Object.keys(_3);
+    if (!(_3 instanceof Array)) {
+        _4 = Object.keys(_3);
+        _5 = Object.values(_3);
+    }
     var _length4 = _4.length;
-    var _5 = _3 instanceof Array ? _3 : Object.values(_3);
     for (let i = 0; i < _length4; i++) {
         context.elem_first = i === 0;
         context.elem_last = i === _length4 - 1;
-        context.elem_parity = i % 2 === 0 ? 'even' : 'odd';
         context.elem_index = i;
         context.elem = _4[i];
         context.elem_value = _5[i];

tests/__snapshots__/store.test.ts.snap

@@ -1,5 +1,9 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
+exports[`connecting a component to store connecting a component to a local store 1`] = `"<div></div>"`;
+
+exports[`connecting a component to store connecting a component to a local store 2`] = `"<div><span>hello</span></div>"`;
+
 exports[`connecting a component to store connecting a component works 1`] = `"<div></div>"`;
 
 exports[`connecting a component to store connecting a component works 2`] = `"<div><span>hello</span></div>"`;

tests/animations.test.ts

@@ -253,11 +253,11 @@ describe("animations", () => {
     widget.state.display = false;
     patchNextFrame(cb => {
       expect(fixture.innerHTML).toBe(
-        '<div><span class="chimay-leave chimay-leave-active">blue</span></div>'
+        '<div><span class="chimay-leave chimay-leave-active" data-owl-key="4">blue</span></div>'
       );
       cb();
       expect(fixture.innerHTML).toBe(
-        '<div><span class="chimay-leave-active chimay-leave-to">blue</span></div>'
+        '<div><span class="chimay-leave-active chimay-leave-to" data-owl-key="4">blue</span></div>'
       );
       def.resolve();
     });
@@ -287,4 +287,133 @@ describe("animations", () => {
     expect(widget.f).toHaveBeenCalledTimes(1);
     unpatchNextFrame();
   });
+
+  test("t-transition, remove and re-add before transitionend", async () => {
+    expect.assertions(11);
+
+    env.qweb.addTemplates(
+      `<templates>
+        <div t-name="Parent">
+          <button t-on-click="toggle">Toggle</button>
+          <span t-if="state.flag" t-transition="chimay">blue</span>
+        </div>
+      </templates>`
+    );
+    class Parent extends Widget {
+      constructor(parent) {
+        super(parent);
+        this.state = { flag: false };
+      }
+      toggle() {
+        this.state.flag = !this.state.flag;
+      }
+    }
+
+    const widget = new Parent(env);
+    await widget.mount(fixture);
+    let button = widget.el!.querySelector("button");
+
+    let def = makeDeferred();
+    let phase = "enter";
+    patchNextFrame(cb => {
+      let spans = fixture.querySelectorAll("span");
+      expect(spans.length).toBe(1);
+      expect(spans[0].className).toBe(`chimay-${phase} chimay-${phase}-active`);
+      cb();
+      expect(spans[0].className).toBe(
+        `chimay-${phase}-active chimay-${phase}-to`
+      );
+      def.resolve();
+    });
+
+    // click display the span
+    button!.click();
+    await def; // wait for the mocked repaint to be done
+    widget.el!.querySelector("span")!.dispatchEvent(new Event("transitionend")); // mock end of css transition
+    expect(fixture.innerHTML).toBe(
+      '<div><button>Toggle</button><span class="">blue</span></div>'
+    );
+
+    // click to remove the span, and click again to re-add it before transitionend
+    def = makeDeferred();
+    phase = "leave";
+    button!.click();
+
+    await def; // wait for the mocked repaint to be done
+    def = makeDeferred();
+    phase = "enter";
+    button!.click();
+
+    await def; // wait for the mocked repaint to be done
+    widget.el!.querySelector("span")!.dispatchEvent(new Event("transitionend")); // mock end of css transition
+    expect(fixture.innerHTML).toBe(
+      '<div><button>Toggle</button><span class="">blue</span></div>'
+    );
+  });
+
+  test("t-transition combined with t-widget, remove and re-add before transitionend", async () => {
+    expect.assertions(11);
+
+    env.qweb.addTemplates(
+      `<templates>
+        <div t-name="Parent">
+          <button t-on-click="toggle">Toggle</button>
+          <t t-if="state.flag" t-widget="Child" t-transition="chimay"/>
+        </div>
+        <span t-name="Child">blue</span>
+      </templates>`
+    );
+    class Child extends Widget {}
+    class Parent extends Widget {
+      widgets = { Child };
+      constructor(parent) {
+        super(parent);
+        this.state = { flag: false };
+      }
+      toggle() {
+        this.state.flag = !this.state.flag;
+      }
+    }
+
+    const widget = new Parent(env);
+    await widget.mount(fixture);
+    let button = widget.el!.querySelector("button");
+
+    let def = makeDeferred();
+    let phase = "enter";
+    patchNextFrame(cb => {
+      let spans = fixture.querySelectorAll("span");
+      expect(spans.length).toBe(1);
+      expect(spans[0].className).toBe(`chimay-${phase} chimay-${phase}-active`);
+      cb();
+      expect(spans[0].className).toBe(
+        `chimay-${phase}-active chimay-${phase}-to`
+      );
+      def.resolve();
+    });
+
+    // click display the span
+    button!.click();
+    await def; // wait for the mocked repaint to be done
+    widget.el!.querySelector("span")!.dispatchEvent(new Event("transitionend")); // mock end of css transition
+    expect(fixture.innerHTML).toBe(
+      '<div><button>Toggle</button><span class="">blue</span></div>'
+    );
+
+    // click to remove the span, and click again to re-add it before transitionend
+    def = makeDeferred();
+    phase = "leave";
+    button!.click();
+
+    await def; // wait for the mocked repaint to be done
+    def = makeDeferred();
+    phase = "enter";
+    button!.click();
+
+    await def; // wait for the mocked repaint to be done
+    widget.el!.querySelector("span")!.dispatchEvent(new Event("transitionend")); // mock end of css transition
+    expect(fixture.innerHTML).toBe(
+      '<div><button>Toggle</button><span class="">blue</span></div>'
+    );
+  });
 });

tests/component.test.ts

@@ -6,7 +6,8 @@ import {
   makeTestEnv,
   nextMicroTick,
   nextTick,
-  normalize
+  normalize,
+  editInput
 } from "./helpers";
 
 //------------------------------------------------------------------------------
@@ -24,6 +25,7 @@ let env: Env;
 beforeEach(() => {
   fixture = makeTestFixture();
   env = makeTestEnv();
+  env.qweb.addTemplate("Widget", "<div></div>");
   env.qweb.addTemplate(
     "Counter",
     `<div><t t-esc="state.counter"/><button t-on-click="inc">Inc</button></div>`
@@ -82,6 +84,19 @@ describe("basic widget properties", () => {
     expect(fixture.innerHTML).toBe("<div></div>");
   });
 
+  test("crashes if it cannot find a template", async () => {
+    expect.assertions(1);
+    class SomeWidget extends Component<any, any, any> {}
+    const widget = new SomeWidget(env);
+    try {
+      await widget.mount(fixture);
+    } catch (e) {
+      expect(e.message).toBe(
+        'Could not find template for component "SomeWidget"'
+      );
+    }
+  });
+
   test("can be clicked on and updated", async () => {
     const counter = new Counter(env);
     await counter.mount(fixture);
@@ -1144,6 +1159,39 @@ describe("composition", () => {
     expect(input2.value).toBe("test");
   });
 
+  test("sub widget with t-ref and t-keepalive", async () => {
+    env.qweb.addTemplates(`
+      <templates>
+        <div t-name="ParentWidget">
+          <t t-if="state.ok"><t t-widget="ChildWidget" t-ref="child" t-keepalive="1"/></t>
+        </div>
+        <span t-name="ChildWidget">Hello</span>
+      </templates>`);
+    class ParentWidget extends Widget {
+      state = { ok: true };
+      widgets = { ChildWidget };
+    }
+    class ChildWidget extends Widget {}
+    const widget = new ParentWidget(env);
+    await widget.mount(fixture);
+    let child = children(widget)[0];
+
+    expect(fixture.innerHTML).toBe("<div><span>Hello</span></div>");
+    expect(widget.refs.child).toEqual(child);
+
+    widget.state.ok = false;
+    await nextTick();
+
+    expect(fixture.innerHTML).toBe("<div></div>");
+    expect(widget.refs.child).toEqual(child);
+
+    widget.state.ok = true;
+    await nextTick();
+
+    expect(fixture.innerHTML).toBe("<div><span>Hello</span></div>");
+    expect(widget.refs.child).toEqual(child);
+  });
+
   test("sub widgets rendered in a loop", async () => {
     env.qweb.addTemplate("ChildWidget", `<span><t t-esc="props.n"/></span>`);
     class ChildWidget extends Widget {}
@@ -1815,7 +1863,7 @@ describe("random stuff/miscellaneous", () => {
     // directive as a key
     env.qweb.addTemplate(
       "Test",
-      `<div><t t-foreach="2">txt</t><t t-widget="widget"/></div>`
+      `<div><t t-foreach="Array(2)">txt</t><t t-widget="widget"/></div>`
     );
     class Test extends Widget {
       widgets = { widget: Widget };
@@ -2319,6 +2367,194 @@ describe("async rendering", () => {
     await nextTick();
     expect(destroyCount).toBe(0);
   });
+
+  test("delayed t-widget with t-asyncroot directive", async () => {
+    env.qweb.addTemplates(`
+      <templates>
+        <div t-name="Parent">
+          <button t-on-click="updateApp">Update App State</button>
+          <div class="children">
+            <t t-widget="Child" val="state.val"/>
+            <t t-widget="AsyncChild" t-asyncroot="1" val="state.val"/>
+          </div>
+        </div>
+        <span t-name="Child"><t t-esc="props.val"/></span>
+      </templates>
+    `);
+
+    let def;
+    class Parent extends Widget {
+      widgets = { Child, AsyncChild };
+      state = { val: 0 };
+
+      updateApp() {
+        this.state.val++;
+      }
+    }
+    class Child extends Widget {}
+    class AsyncChild extends Child {
+      willUpdateProps() {
+        return def;
+      }
+    }
+
+    const parent = new Parent(env);
+    await parent.mount(fixture);
+
+    expect(env.qweb.templates.Parent.fn.toString()).toMatchSnapshot();
+    expect(fixture.querySelector(".children")!.innerHTML).toBe(
+      "<span>0</span><span>0</span>"
+    );
+
+    // click on button to increment Parent counter
+    def = makeDeferred();
+    fixture.querySelector("button")!.click();
+    await nextTick();
+
+    expect(fixture.querySelector(".children")!.innerHTML).toBe(
+      "<span>1</span><span>0</span>"
+    );
+
+    def.resolve();
+    await nextTick();
+
+    expect(fixture.querySelector(".children")!.innerHTML).toBe(
+      "<span>1</span><span>1</span>"
+    );
+  });
+
+  test("fast t-widget with t-asyncroot directive", async () => {
+    env.qweb.addTemplates(`
+      <templates>
+        <div t-name="Parent">
+          <button t-on-click="updateApp">Update App State</button>
+          <div class="children">
+            <t t-widget="Child" t-asyncroot="1" val="state.val"/>
+            <t t-widget="AsyncChild" val="state.val"/>
+          </div>
+        </div>
+        <span t-name="Child"><t t-esc="props.val"/></span>
+      </templates>
+    `);
+
+    let def;
+    class Parent extends Widget {
+      widgets = { Child, AsyncChild };
+      state = { val: 0 };
+
+      updateApp() {
+        this.state.val++;
+      }
+    }
+    class Child extends Widget {}
+    class AsyncChild extends Child {
+      willUpdateProps() {
+        return def;
+      }
+    }
+
+    const parent = new Parent(env);
+    await parent.mount(fixture);
+
+    expect(env.qweb.templates.Parent.fn.toString()).toMatchSnapshot();
+    expect(fixture.querySelector(".children")!.innerHTML).toBe(
+      "<span>0</span><span>0</span>"
+    );
+
+    // click on button to increment Parent counter
+    def = makeDeferred();
+    fixture.querySelector("button")!.click();
+    await nextTick();
+
+    expect(fixture.querySelector(".children")!.innerHTML).toBe(
+      "<span>1</span><span>0</span>"
+    );
+
+    def.resolve();
+    await nextTick();
+
+    expect(fixture.querySelector(".children")!.innerHTML).toBe(
+      "<span>1</span><span>1</span>"
+    );
+  });
+
+  test("t-widget with t-asyncroot directive: mixed re-renderings", async () => {
+    env.qweb.addTemplates(`
+      <templates>
+        <div t-name="Parent">
+          <button t-on-click="updateApp">Update App State</button>
+          <div class="children">
+            <t t-widget="Child" val="state.val"/>
+            <t t-widget="AsyncChild" t-asyncroot="1" val="state.val"/>
+          </div>
+        </div>
+        <span t-name="Child" t-on-click="increment">
+          <t t-esc="state.val"/>/<t t-esc="props.val"/>
+        </span>
+      </templates>
+    `);
+
+    let def;
+    class Parent extends Widget {
+      widgets = { Child, AsyncChild };
+      state = { val: 0 };
+
+      updateApp() {
+        this.state.val++;
+      }
+    }
+    class Child extends Widget {
+      state = { val: 0 };
+
+      increment() {
+        this.state.val++;
+      }
+    }
+    class AsyncChild extends Child {
+      willUpdateProps() {
+        return def;
+      }
+    }
+
+    const parent = new Parent(env);
+    await parent.mount(fixture);
+
+    expect(env.qweb.templates.Parent.fn.toString()).toMatchSnapshot();
+    expect(fixture.querySelector(".children")!.innerHTML).toBe(
+      "<span>0/0</span><span>0/0</span>"
+    );
+
+    // click on button to increment Parent counter
+    def = makeDeferred();
+    fixture.querySelector("button")!.click();
+    await nextTick();
+
+    expect(fixture.querySelector(".children")!.innerHTML).toBe(
+      "<span>0/1</span><span>0/0</span>"
+    );
+
+    // click on each Child to increment their local counter
+    const children = parent.el!.querySelectorAll("span");
+    children[0]!.click();
+    await nextTick();
+    expect(fixture.querySelector(".children")!.innerHTML).toBe(
+      "<span>1/1</span><span>0/0</span>"
+    );
+
+    children[1]!.click();
+    await nextTick();
+    expect(fixture.querySelector(".children")!.innerHTML).toBe(
+      "<span>1/1</span><span>1/0</span>"
+    );
+
+    // finalize first re-rendering (coming from the props update)
+    def.resolve();
+    await nextTick();
+
+    expect(fixture.querySelector(".children")!.innerHTML).toBe(
+      "<span>1/1</span><span>1/1</span>"
+    );
+  });
 });
 
 describe("updating environment", () => {
@@ -2465,24 +2701,6 @@ describe("widget and observable state", () => {
       );
     }
   });
-
-  test("widget can add observed keys to its state", async () => {
-    env.qweb.addTemplate(
-      "TestWidget",
-      `<div><t t-esc="state.a"/><t t-esc="state.b"/></div>`
-    );
-    class TestWidget extends Widget {
-      state: any = { a: 1 };
-    }
-    const widget = new TestWidget(env);
-    await widget.mount(fixture);
-
-    expect(fixture.innerHTML).toBe("<div>1</div>");
-
-    widget.set(widget.state, "b", 2);
-    await nextTick();
-    expect(fixture.innerHTML).toBe("<div>12</div>");
-  });
 });
 
 describe("t-mounted directive", () => {
@@ -2598,3 +2816,359 @@ describe("can deduce template from name", () => {
     expect(fixture.innerHTML).toBe("<span>Rochefort 10</span>");
   });
 });
+
+describe("t-slot directive", () => {
+  test("can define and call slots", async () => {
+    env.qweb.addTemplates(`
+        <templates>
+          <div t-name="Parent">
+             <t t-widget="Dialog">
+                <t t-set="header"><span>header</span></t>
+                <t t-set="footer"><span>footer</span></t>
+             </t>
+          </div>
+          <div t-name="Dialog">
+            <div><t t-slot="header"/></div>
+            <div><t t-slot="footer"/></div>
+          </div>
+        </templates>
+    `);
+    class Dialog extends Widget {}
+    class Parent extends Widget {
+      widgets = { Dialog };
+    }
+    const parent = new Parent(env);
+    await parent.mount(fixture);
+
+    expect(fixture.innerHTML).toBe(
+      "<div><div><div><span>header</span></div><div><span>footer</span></div></div></div>"
+    );
+    expect(env.qweb.templates.Parent.fn.toString()).toMatchSnapshot();
+    expect(env.qweb.templates.Dialog.fn.toString()).toMatchSnapshot();
+  });
+
+  test("slots are rendered with proper context", async () => {
+    env.qweb.addTemplates(`
+        <templates>
+          <div t-name="Parent">
+            <span class="counter"><t t-esc="state.val"/></span>
+            <t t-widget="Dialog">
+              <t t-set="footer"><button t-on-click="doSomething">do something</button></t>
+            </t>
+          </div>
+          <span t-name="Dialog"><t t-slot="footer"/></span>
+        </templates>
+    `);
+    class Dialog extends Widget {}
+    class Parent extends Widget {
+      widgets = { Dialog };
+      state = { val: 0 };
+      doSomething() {
+        this.state.val++;
+      }
+    }
+    const parent = new Parent(env);
+    await parent.mount(fixture);
+
+    expect(fixture.innerHTML).toBe(
+      '<div><span class="counter">0</span><span><button>do something</button></span></div>'
+    );
+
+    fixture.querySelector("button")!.click();
+    await nextTick();
+
+    expect(fixture.innerHTML).toBe(
+      '<div><span class="counter">1</span><span><button>do something</button></span></div>'
+    );
+  });
+
+  test("refs are properly bound in slots", async () => {
+    env.qweb.addTemplates(`
+        <templates>
+          <div t-name="Parent">
+            <span class="counter"><t t-esc="state.val"/></span>
+            <t t-widget="Dialog">
+              <t t-set="footer"><button t-ref="myButton" t-on-click="doSomething">do something</button></t>
+            </t>
+          </div>
+          <span t-name="Dialog"><t t-slot="footer"/></span>
+        </templates>
+    `);
+    class Dialog extends Widget {}
+    class Parent extends Widget {
+      widgets = { Dialog };
+      state = { val: 0 };
+      doSomething() {
+        this.state.val++;
+      }
+    }
+    const parent = new Parent(env);
+    await parent.mount(fixture);
+
+    expect(fixture.innerHTML).toBe(
+      '<div><span class="counter">0</span><span><button>do something</button></span></div>'
+    );
+
+    (<any>parent.refs.myButton).click();
+    await nextTick();
+
+    expect(fixture.innerHTML).toBe(
+      '<div><span class="counter">1</span><span><button>do something</button></span></div>'
+    );
+  });
+});
+
+describe("t-model directive", () => {
+  test("basic use, on an input", async () => {
+    env.qweb.addTemplates(`
+    <templates>
+        <div t-name="SomeComponent">
+            <input t-model="text"/>
+            <span><t t-esc="state.text"/></span>
+        </div>
+    </templates>`);
+    class SomeComponent extends Widget {
+      state = { text: "" };
+    }
+    const comp = new SomeComponent(env);
+    await comp.mount(fixture);
+
+    expect(fixture.innerHTML).toBe("<div><input><span></span></div>");
+
+    const input = fixture.querySelector("input")!;
+    await editInput(input, "test");
+    expect(comp.state.text).toBe("test");
+    expect(fixture.innerHTML).toBe("<div><input><span>test</span></div>");
+    expect(env.qweb.templates.SomeComponent.fn.toString()).toMatchSnapshot();
+  });
+
+  test("on an input, type=checkbox", async () => {
+    env.qweb.addTemplates(`
+    <templates>
+        <div t-name="SomeComponent">
+            <input type="checkbox" t-model="flag"/>
+            <span>
+                <t t-if="state.flag">yes</t>
+                <t t-else="1">no</t>
+            </span>
+        </div>
+    </templates>`);
+    class SomeComponent extends Widget {
+      state = { flag: false };
+    }
+    const comp = new SomeComponent(env);
+    await comp.mount(fixture);
+
+    expect(fixture.innerHTML).toBe(
+      '<div><input type="checkbox"><span>no</span></div>'
+    );
+
+    let input = fixture.querySelector("input")!;
+    input.click();
+    await nextTick();
+    expect(fixture.innerHTML).toBe(
+      '<div><input type="checkbox"><span>yes</span></div>'
+    );
+    expect(comp.state.flag).toBe(true);
+    expect(env.qweb.templates.SomeComponent.fn.toString()).toMatchSnapshot();
+
+    input.click();
+    await nextTick();
+    expect(comp.state.flag).toBe(false);
+  });
+
+  test("on an textarea", async () => {
+    env.qweb.addTemplates(`
+    <templates>
+        <div t-name="SomeComponent">
+            <textarea t-model="text"/>
+            <span><t t-esc="state.text"/></span>
+        </div>
+    </templates>`);
+    class SomeComponent extends Widget {
+      state = { text: "" };
+    }
+    const comp = new SomeComponent(env);
+    await comp.mount(fixture);
+
+    expect(fixture.innerHTML).toBe(
+      "<div><textarea></textarea><span></span></div>"
+    );
+
+    const textarea = fixture.querySelector("textarea")!;
+    await editInput(textarea, "test");
+    expect(comp.state.text).toBe("test");
+    expect(fixture.innerHTML).toBe(
+      "<div><textarea></textarea><span>test</span></div>"
+    );
+  });
+
+  test("on an input type=radio", async () => {
+    env.qweb.addTemplates(`
+    <templates>
+        <div t-name="SomeComponent">
+            <input type="radio" id="one" value="One" t-model="choice"/>
+            <input type="radio" id="two" value="Two" t-model="choice"/>
+            <span>Choice: <t t-esc="state.choice"/></span>
+        </div>
+    </templates>`);
+    class SomeComponent extends Widget {
+      state = { choice: "" };
+    }
+    const comp = new SomeComponent(env);
+    await comp.mount(fixture);
+
+    expect(fixture.innerHTML).toBe(
+      '<div><input type="radio" id="one" value="One"><input type="radio" id="two" value="Two"><span>Choice: </span></div>'
+    );
+
+    const firstInput = fixture.querySelector("input")!;
+    firstInput.click();
+    await nextTick();
+    expect(comp.state.choice).toBe("One");
+    expect(fixture.innerHTML).toBe(
+      '<div><input type="radio" id="one" value="One"><input type="radio" id="two" value="Two"><span>Choice: One</span></div>'
+    );
+
+    const secondInput = fixture.querySelectorAll("input")[1];
+    secondInput.click();
+    await nextTick();
+    expect(comp.state.choice).toBe("Two");
+    expect(fixture.innerHTML).toBe(
+      '<div><input type="radio" id="one" value="One"><input type="radio" id="two" value="Two"><span>Choice: Two</span></div>'
+    );
+    expect(env.qweb.templates.SomeComponent.fn.toString()).toMatchSnapshot();
+  });
+
+  test("on a select", async () => {
+    env.qweb.addTemplates(`
+    <templates>
+        <div t-name="SomeComponent">
+            <select t-model="color">
+                <option value="">Please select one</option>
+                <option value="red">Red</option>
+                <option value="blue">Blue</option>
+            </select>
+            <span>Choice: <t t-esc="state.color"/></span>
+        </div>
+    </templates>`);
+    class SomeComponent extends Widget {
+      state = { color: "" };
+    }
+    const comp = new SomeComponent(env);
+    await comp.mount(fixture);
+
+    expect(fixture.innerHTML).toBe(
+      '<div><select><option value="">Please select one</option><option value="red">Red</option><option value="blue">Blue</option></select><span>Choice: </span></div>'
+    );
+
+    const select = fixture.querySelector("select")!;
+    select.value = "red";
+    select.dispatchEvent(new Event("change"));
+    await nextTick();
+
+    expect(comp.state.color).toBe("red");
+    expect(fixture.innerHTML).toBe(
+      '<div><select><option value="">Please select one</option><option value="red">Red</option><option value="blue">Blue</option></select><span>Choice: red</span></div>'
+    );
+
+    expect(env.qweb.templates.SomeComponent.fn.toString()).toMatchSnapshot();
+  });
+
+  test(".lazy modifier", async () => {
+    env.qweb.addTemplates(`
+    <templates>
+        <div t-name="SomeComponent">
+            <input t-model.lazy="text"/>
+            <span><t t-esc="state.text"/></span>
+        </div>
+    </templates>`);
+    class SomeComponent extends Widget {
+      state = { text: "" };
+    }
+    const comp = new SomeComponent(env);
+    await comp.mount(fixture);
+
+    expect(fixture.innerHTML).toBe("<div><input><span></span></div>");
+
+    const input = fixture.querySelector("input")!;
+    input.value = "test";
+    input.dispatchEvent(new Event("input"));
+    await nextTick();
+    expect(comp.state.text).toBe("");
+    expect(fixture.innerHTML).toBe("<div><input><span></span></div>");
+    input.dispatchEvent(new Event("change"));
+    await nextTick();
+    expect(comp.state.text).toBe("test");
+    expect(fixture.innerHTML).toBe("<div><input><span>test</span></div>");
+    expect(env.qweb.templates.SomeComponent.fn.toString()).toMatchSnapshot();
+  });
+
+  test(".trim modifier", async () => {
+    env.qweb.addTemplates(`
+    <templates>
+        <div t-name="SomeComponent">
+            <input t-model.trim="text"/>
+            <span><t t-esc="state.text"/></span>
+        </div>
+    </templates>`);
+    class SomeComponent extends Widget {
+      state = { text: "" };
+    }
+    const comp = new SomeComponent(env);
+    await comp.mount(fixture);
+
+    const input = fixture.querySelector("input")!;
+    await editInput(input, " test ");
+    expect(comp.state.text).toBe("test");
+    expect(fixture.innerHTML).toBe("<div><input><span>test</span></div>");
+  });
+
+  test(".number modifier", async () => {
+    env.qweb.addTemplates(`
+    <templates>
+        <div t-name="SomeComponent">
+            <input t-model.number="number"/>
+            <span><t t-esc="state.number"/></span>
+        </div>
+    </templates>`);
+    class SomeComponent extends Widget {
+      state = { number: 0 };
+    }
+    const comp = new SomeComponent(env);
+    await comp.mount(fixture);
+    expect(fixture.innerHTML).toBe("<div><input><span>0</span></div>");
+
+    const input = fixture.querySelector("input")!;
+    await editInput(input, "13");
+    expect(comp.state.number).toBe(13);
+    expect(fixture.innerHTML).toBe("<div><input><span>13</span></div>");
+
+    await editInput(input, "invalid");
+    expect(comp.state.number).toBe("invalid");
+    expect(fixture.innerHTML).toBe("<div><input><span>invalid</span></div>");
+  });
+
+  test("content is the default slot", async () => {
+    env.qweb.addTemplates(`
+        <templates>
+          <div t-name="Parent">
+             <t t-widget="Dialog">
+                <span>sts rocks</span>
+             </t>
+          </div>
+          <div t-name="Dialog"><t t-slot="default"/></div>
+        </templates>
+    `);
+    class Dialog extends Widget {}
+    class Parent extends Widget {
+      widgets = { Dialog };
+    }
+    const parent = new Parent(env);
+    await parent.mount(fixture);
+
+    expect(fixture.innerHTML).toBe(
+      "<div><div><span>sts rocks</span></div></div>"
+    );
+  });
+});

tests/doc_link_checker.test.ts

@@ -0,0 +1,131 @@
+/**
+ * Doc Link Checker
+ *
+ * We define here a test to make sure that there are no dead link in the Owl
+ * documentation.
+ */
+import * as fs from "fs";
+
+const LINK_REGEXP = /\[([^\[]+)\]\(([^\)]+)\)/g;
+const HEADING_REGEXP = /\n(#+\s*)(.*)/g;
+
+// files to be checked
+function getFiles(): string[] {
+  const DOCFILES = fs.readdirSync("doc").map(f => `doc/${f}`);
+  const MAINREADME = "README.md";
+  return DOCFILES.concat(MAINREADME);
+}
+
+test("All markdown links work", () => {
+  let linkNumber = 0;
+  let invalidLinkNumber = 0;
+  const files = getFiles();
+  const data = readDocData(files);
+  for (let file of data) {
+    for (let link of file.links) {
+      // DEBUG: uncomment next line
+      // console.warn(`Checking "${link.name}" in "${file.name}"`);
+      linkNumber++;
+      if (!isLinkValid(link, file, data)) {
+        console.warn(`Invalid Link: "${link.name}" in "${file.name}"`);
+        invalidLinkNumber++;
+      }
+    }
+  }
+  expect(invalidLinkNumber).toBe(0);
+  expect(linkNumber).toBeGreaterThan(10);
+});
+
+interface MarkDownLink {
+  name: string;
+  link: string;
+}
+
+interface MarkDownSection {
+  name: string;
+  slug: string;
+}
+
+interface FileData {
+  name: string;
+  links: MarkDownLink[];
+  sections: MarkDownSection[];
+}
+
+function isLinkValid(
+  link: MarkDownLink,
+  current: FileData,
+  files: FileData[]
+): boolean {
+  const parts = link.link.split("#");
+  const currentParts = current.name.split("/");
+  const path = currentParts.length > 1 ? currentParts[0] + '/' : "";
+  const fullName =  path + parts[0];
+  if (parts.length === 1) {
+    // no # in url
+    if (parts[0].endsWith(".md")) {
+      // it is a local md file
+      if (!files.find(f => f.name === fullName)) {
+        return false;
+      }
+    }
+  } else {
+    const file =
+      parts[0] === "" ? current : files.find(f => f.name === fullName);
+    if (!file) {
+      return false;
+    }
+    if (!file.sections.find(s => s.slug === parts[1])) {
+      return false;
+    }
+  }
+  return true;
+}
+// adapted from https://medium.com/@mhagemann/the-ultimate-way-to-slugify-a-url-string-in-javascript-b8e4a0d849e1
+function slugify(str) {
+  const a = "àáäâãåăæçèéëêǵḧìíïîḿńǹñòóöôœøṕŕßśșțùúüûǘẃẍÿź·_,:;";
+  const b = "aaaaaaaaceeeeghiiiimnnnooooooprssstuuuuuwxyz-----";
+  const p = new RegExp(a.split("").join("|"), "g");
+  return str
+    .toString()
+    .toLowerCase()
+    .replace(/\//g, "") // remove /
+    .replace(/\s+/g, "-") // Replace spaces with -
+    .replace(p, c => b.charAt(a.indexOf(c))) // Replace special characters
+    .replace(/&/g, "-and-") // Replace & with ‘and’
+    .replace(/[^\w\-]+/g, "") // Remove all non-word characters
+    .replace(/\-\-+/g, "-") // Replace multiple - with single -
+    .replace(/^-+/, "") // Trim - from start of text
+    .replace(/-+$/, ""); // Trim - from end of text
+}
+
+function readDocData(files: string[]): FileData[] {
+  const result: FileData[] = [];
+
+  for (let file of files) {
+    const fileData: FileData = {
+      name: file,
+      links: [],
+      sections: []
+    };
+    const content = fs.readFileSync(file, { encoding: "utf8" });
+    let m;
+    // get links info
+    do {
+      m = LINK_REGEXP.exec(content);
+      if (m) {
+        fileData.links.push({ name: m[0], link: m[2] });
+      }
+    } while (m);
+    // get sections info
+    do {
+      m = HEADING_REGEXP.exec(content);
+      if (m) {
+        fileData.sections.push({ name: m[0], slug: slugify(m[2]) });
+      }
+    } while (m);
+
+    result.push(fileData);
+  }
+  return result;
+}

tests/helpers.ts

@@ -91,3 +91,13 @@ export function patchNextFrame(f: Function) {
 export function unpatchNextFrame() {
   UTILS.nextFrame = nextFrame;
 }
+
+export async function editInput(
+  input: HTMLInputElement | HTMLTextAreaElement,
+  value: string
+) {
+  input.value = value;
+  input.dispatchEvent(new Event("input"));
+  input.dispatchEvent(new Event("change"));
+  return nextTick();
+}

tests/observer.test.ts

@@ -134,6 +134,57 @@ describe("observer", () => {
     expect(arr[0].__owl__.rev).toBe(3);
   });
 
+  test("set new property on observed object", async () => {
+    const observer = new Observer();
+    observer.notifyCB = jest.fn();
+    const state: any = { a: 1 };
+    observer.observe(state);
+    expect(state.__owl__.rev).toBe(1);
+    expect(observer.rev).toBe(1);
+    expect(observer.notifyCB).toBeCalledTimes(0);
+
+    Observer.set(state, "b", 8);
+    await nextMicroTick();
+    expect(state.__owl__.rev).toBe(2);
+    expect(observer.rev).toBe(2);
+    expect(observer.notifyCB).toBeCalledTimes(1);
+    expect(state.b).toBe(8);
+  });
+
+  test("delete property from observed object", async () => {
+    const observer = new Observer();
+    observer.notifyCB = jest.fn();
+    const state: any = { a: 1, b: 8 };
+    observer.observe(state);
+    expect(state.__owl__.rev).toBe(1);
+    expect(observer.rev).toBe(1);
+    expect(observer.notifyCB).toBeCalledTimes(0);
+
+    Observer.delete(state, "b");
+    await nextMicroTick();
+    expect(state.__owl__.rev).toBe(2);
+    expect(observer.rev).toBe(2);
+    expect(observer.notifyCB).toBeCalledTimes(1);
+    expect(state).toEqual({ a: 1 });
+  });
+
+  test("set element in observed array", async () => {
+    const observer = new Observer();
+    observer.notifyCB = jest.fn();
+    const state: any = ["a"];
+    observer.observe(state);
+    expect(state.__owl__.rev).toBe(1);
+    expect(observer.rev).toBe(1);
+    expect(observer.notifyCB).toBeCalledTimes(0);
+
+    Observer.set(state, 1, "b");
+    await nextMicroTick();
+    expect(state.__owl__.rev).toBe(2);
+    expect(observer.rev).toBe(2);
+    expect(observer.notifyCB).toBeCalledTimes(1);
+    expect(state).toEqual(["a", "b"]);
+  });
+
   test("properly observe arrays in object", () => {
     const observer = new Observer();
     const state: any = { arr: [] };

tests/qweb.test.ts

@@ -24,6 +24,16 @@ describe("static templates", () => {
     expect(renderToString(qweb, "test")).toBe("hello vdom");
   });
 
+  test("simple dynamic value", () => {
+    qweb.addTemplate("test", "<t><t t-esc=\"text\"/></t>");
+    expect(renderToString(qweb, "test", {text: "hello vdom"})).toBe("hello vdom");
+  });
+
+  test("simple string, with some dynamic value", () => {
+    qweb.addTemplate("test", "<t>hello <t t-esc=\"text\"/></t>");
+    expect(renderToString(qweb, "test", {text: "vdom"})).toBe("hello vdom");
+  });
+
   test("empty div", () => {
     qweb.addTemplate("test", "<div></div>");
     expect(renderToString(qweb, "test")).toBe("<div></div>");
@@ -84,23 +94,6 @@ describe("error handling", () => {
     ).toThrow("Missing event name with t-on directive");
   });
 
-  test("error when compiled code is invalid", () => {
-    const consoleWarn = console.warn;
-    const consoleGroupCollapsed = console.groupCollapsed;
-    console.warn = jest.fn();
-    console.groupCollapsed = jest.fn();
-    qweb.addTemplate(
-      "templatename",
-      `<div t-att-hey="}/^function invalid{{>'"></div>`
-    );
-    expect(() => qweb.render("templatename")).toThrow(
-      "Invalid generated code while compiling template 'templatename': Unexpected token }"
-    );
-    expect(console.warn).toBeCalledTimes(1);
-    console.warn = consoleWarn;
-    console.groupCollapsed = consoleGroupCollapsed;
-  });
-
   test("error when unknown directive", () => {
     qweb.addTemplate(
       "templatename",
@@ -184,7 +177,7 @@ describe("t-set", () => {
   test("t-set and t-if", () => {
     qweb.addTemplate(
       "test",
-      `<div >
+      `<div>
         <t t-set="v" t-value="value"/>
         <t t-if="v === 'ok'">grimbergen</t>
         </div>`
@@ -485,7 +478,7 @@ describe("attributes", () => {
   });
 
   test("format expression, other format", () => {
-    qweb.addTemplate("test", `<div t-attf-foo="#{value + 37}"/>`);
+    qweb.addTemplate("test", `<div t-attf-foo="{{value + 37}}"/>`);
     const result = renderToString(qweb, "test", { value: 5 });
     expect(result).toBe(`<div foo="42"></div>`);
   });
@@ -530,7 +523,10 @@ describe("attributes", () => {
   });
 
   test("class and t-attf-class with ternary operation", () => {
-    qweb.addTemplate("test", `<div class="hello" t-attf-class="#{value ? 'world' : ''}"/>`);
+    qweb.addTemplate(
+      "test",
+      `<div class="hello" t-attf-class="{{value ? 'world' : ''}}"/>`
+    );
     const result = renderToString(qweb, "test", { value: true });
     expect(result).toBe(`<div class="hello world"></div>`);
   });
@@ -657,25 +653,13 @@ describe("foreach", () => {
       "test",
       `
       <div>
-        <t t-foreach="5" t-as="elem">
+        <t t-foreach="Array(5)" t-as="elem">
-          -<t t-if="elem_first"> first</t><t t-if="elem_last"> last</t> (<t t-esc="elem_parity"/>)
+          -<t t-if="elem_first"> first</t><t t-if="elem_last"> last</t> (<t t-esc="elem_index"/>)
         </t>
       </div>`
     );
     const result = trim(renderToString(qweb, "test"));
-    const expected = `<div>-first(even)-(odd)-(even)-(odd)-last(even)</div>`;
+    const expected = `<div>-first(0)-(1)-(2)-(3)-last(4)</div>`;
-    expect(result).toBe(expected);
-  });
-
-  test("iterate, integer param", () => {
-    qweb.addTemplate(
-      "test",
-      `<div><t t-foreach="3" t-as="item">
-        [<t t-esc="item_index"/>: <t t-esc="item"/> <t t-esc="item_value"/>]
-      </t></div>`
-    );
-    const result = trim(renderToString(qweb, "test"));
-    const expected = `<div>[0:00][1:11][2:22]</div>`;
     expect(result).toBe(expected);
   });
 
@@ -685,14 +669,14 @@ describe("foreach", () => {
       `
       <div>
         <t t-foreach="value" t-as="item">
-          [<t t-esc="item_index"/>: <t t-esc="item"/> <t t-esc="item_value"/> - <t t-esc="item_parity"/>]
+          [<t t-esc="item_index"/>: <t t-esc="item"/> <t t-esc="item_value"/>]
         </t>
       </div>`
     );
     const result = trim(
       renderToString(qweb, "test", { value: { a: 1, b: 2, c: 3 } })
     );
-    const expected = `<div>[0:a1-even][1:b2-odd][2:c3-even]</div>`;
+    const expected = `<div>[0:a1][1:b2][2:c3]</div>`;
     expect(result).toBe(expected);
   });
 
@@ -1121,7 +1105,7 @@ describe("loading templates", () => {
   test("does not crash if string does not have templates", () => {
     const data = "";
     qweb.addTemplates(data);
-    expect(Object.keys(qweb.templates)).toEqual(["default"]);
+    expect(Object.keys(qweb.templates)).toEqual([]);
   });
 });
 

tests/qweb_expressions.test.ts

@@ -0,0 +1,179 @@
+import { compileExpr, tokenize } from "../src/qweb_expressions";
+
+describe("tokenizer", () => {
+  test("simple tokens", () => {
+    expect(tokenize("1.3")).toEqual([
+      { type: "VALUE", value: "1.3" }
+    ]);
+
+    expect(tokenize("{}")).toEqual([
+      { type: "LEFT_BRACE", value: "{" },
+      { type: "RIGHT_BRACE", value: "}" }
+    ]);
+    expect(tokenize("{ }}")).toEqual([
+      { type: "LEFT_BRACE", value: "{" },
+      { type: "RIGHT_BRACE", value: "}" },
+      { type: "RIGHT_BRACE", value: "}" }
+    ]);
+    expect(tokenize("a")).toEqual([{ type: "SYMBOL", value: "a" }]);
+    expect(tokenize("true")).toEqual([{ type: "SYMBOL", value: "true" }]);
+    expect(tokenize("abcde")).toEqual([{ type: "SYMBOL", value: "abcde" }]);
+    expect(tokenize("_ab2")).toEqual([{ type: "SYMBOL", value: "_ab2" }]);
+    expect(tokenize("$ab2")).toEqual([{ type: "SYMBOL", value: "$ab2" }]);
+    expect(tokenize("ABC")).toEqual([{ type: "SYMBOL", value: "ABC" }]);
+
+    expect(tokenize("{a: 2}")).toEqual([
+      { type: "LEFT_BRACE", value: "{" },
+      { type: "SYMBOL", value: "a" },
+      { type: "COLON", value: ":" },
+      { type: "VALUE", value: "2" },
+      { type: "RIGHT_BRACE", value: "}" }
+    ]);
+    expect(tokenize("a,")).toEqual([
+      { type: "SYMBOL", value: "a" },
+      { type: "COMMA", value: "," }
+    ]);
+    expect(tokenize("][")).toEqual([
+      { type: "RIGHT_BRACKET", value: "]" },
+      { type: "LEFT_BRACKET", value: "[" }
+    ]);
+  });
+
+  test("various operators", () => {
+    expect(tokenize(">= <= < >")).toEqual([
+      { type: "OPERATOR", value: ">=" },
+      { type: "OPERATOR", value: "<=" },
+      { type: "OPERATOR", value: "<" },
+      { type: "OPERATOR", value: ">" },
+    ]);
+  });
+
+  test("strings", () => {
+    expect(() => tokenize("'")).toThrow("Invalid expression");
+    expect(() => tokenize("'\\")).toThrow("Invalid expression");
+    expect(() => tokenize("'\\'")).toThrow("Invalid expression");
+    expect(tokenize("'hello ged'")).toEqual([
+      { type: "VALUE", value: "'hello ged'" }
+    ]);
+    expect(tokenize("'hello \\'ged\\''")).toEqual([
+      { type: "VALUE", value: "'hello \\'ged\\''" }
+    ]);
+
+    expect(() => tokenize('"')).toThrow("Invalid expression");
+    expect(() => tokenize('"\\"')).toThrow("Invalid expression");
+    expect(tokenize('"hello ged"')).toEqual([
+      { type: "VALUE", value: '"hello ged"' }
+    ]);
+    expect(tokenize('"hello ged"}')).toEqual([
+      { type: "VALUE", value: '"hello ged"' },
+      { type: "RIGHT_BRACE", value: "}" }
+    ]);
+    expect(tokenize('"hello \\"ged\\""')).toEqual([
+      { type: "VALUE", value: '"hello \\"ged\\""' }
+    ]);
+  });
+});
+
+describe("expression evaluation", () => {
+  test("simple static values", () => {
+    expect(compileExpr("1", {})).toBe("1");
+    expect(compileExpr("1 ", {})).toBe("1");
+    expect(compileExpr("'some string#/, {' ", {})).toBe("'some string#/, {'");
+    expect(compileExpr("{ } ", {})).toBe("{}");
+    expect(compileExpr("{a: 1} ", {})).toBe("{a:1}");
+    expect(compileExpr("{a: 1, b: 2   } ", {})).toBe("{a:1,b:2}");
+    expect(compileExpr("[] ", {})).toBe("[]");
+    expect(compileExpr("[1] ", {})).toBe("[1]");
+    expect(compileExpr("['1', '2'] ", {})).toBe("['1','2']");
+    expect(compileExpr("['1', \"2\"] ", {})).toBe("['1',\"2\"]");
+  });
+
+  test("various types of 'words'", () => {
+    expect(compileExpr("true", {})).toBe("true");
+    expect(compileExpr("false", {})).toBe("false");
+    expect(compileExpr("debugger", {})).toBe("debugger");
+  });
+
+  test("parenthesis", () => {
+    expect(compileExpr("(1)", {})).toBe("(1)");
+    expect(compileExpr("a*(1 +3)", {})).toBe("context['a']*(1+3)");
+  });
+
+  test("objects and sub objects", () => {
+    expect(compileExpr("{a:{b:1}} ", {})).toBe("{a:{b:1}}");
+  });
+
+  test("replacing variables", () => {
+    expect(compileExpr("a", {})).toBe("context['a']");
+    expect(compileExpr("a", { a: { id: "_3", expr: "" } })).toBe("_3");
+  });
+
+  test("arrays and objects", () => {
+    expect(compileExpr("[{b:1}] ", {})).toBe("[{b:1}]");
+    expect(compileExpr("{a: []} ", {})).toBe("{a:[]}");
+    expect(compileExpr("[{b:1, c: [1, {d: {e: 3}} ]}] ", {})).toBe(
+      "[{b:1,c:[1,{d:{e:3}}]}]"
+    );
+  });
+
+  test("dot operator", () => {
+    expect(compileExpr("a.b", {})).toBe("context['a'].b");
+    expect(compileExpr("a.b.c", {})).toBe("context['a'].b.c");
+  });
+
+  test("various unary operators", () => {
+    expect(compileExpr("!flag", {})).toBe("!context['flag']");
+    expect(compileExpr("-3", {})).toBe("-3");
+    expect(compileExpr("-a", {})).toBe("-context['a']");
+  });
+
+  test("various binary operators", () => {
+    expect(compileExpr("color == 'black'", {})).toBe(
+      "context['color']=='black'"
+    );
+    expect(compileExpr("a || b", {})).toBe("context['a']||context['b']");
+    expect(compileExpr("color === 'black'", {})).toBe(
+      "context['color']==='black'"
+    );
+    expect(compileExpr("'li_'+item", {})).toBe("'li_'+context['item']");
+    expect(compileExpr("state.val > 1", {})).toBe("context['state'].val>1");
+  });
+
+  test("boolean operations", () => {
+    expect(compileExpr("a && b", {})).toBe("context['a']&&context['b']");
+  });
+
+  test("ternary operators", () => {
+    expect(compileExpr("a ? b: '2'", {})).toBe("context['a']?context['b']:'2'");
+    expect(compileExpr("a ? b: (c or '2') ", {})).toBe(
+      "context['a']?context['b']:(context['c']||'2')"
+    );
+    expect(compileExpr("a ? {test:c}: [1,u]", {})).toBe(
+      "context['a']?{test:context['c']}:[1,context['u']]"
+    );
+  });
+
+  test("word replacement", () => {
+    expect(compileExpr("a or b", {})).toBe("context['a']||context['b']");
+    expect(compileExpr("a and b", {})).toBe("context['a']&&context['b']");
+  });
+
+  test("function calls", () => {
+    expect(compileExpr("a()", {})).toBe("context['a']()");
+    expect(compileExpr("a(1)", {})).toBe("context['a'](1)");
+    expect(compileExpr("a(1,2)", {})).toBe("context['a'](1,2)");
+    expect(compileExpr("a(1,2,{a:[a]})", {})).toBe(
+      "context['a'](1,2,{a:[context['a']]})"
+    );
+    expect(compileExpr("'x'.toUpperCase()", {})).toBe("'x'.toUpperCase()");
+    expect(compileExpr("'x'.toUpperCase({a: 3})", {})).toBe(
+      "'x'.toUpperCase({a:3})"
+    );
+    expect(
+      compileExpr("'x'.toUpperCase(a)", { a: { id: "_v5", expr: "" } })
+    ).toBe("'x'.toUpperCase(_v5)");
+    expect(
+      compileExpr("'x'.toUpperCase({b: a})", { a: { id: "_v5", expr: "" } })
+    ).toBe("'x'.toUpperCase({b:_v5})");
+  });
+});

tests/store.test.ts

@@ -152,24 +152,6 @@ describe("basic use", () => {
     store.dispatch("someaction");
   });
 
-  test("set function is given to mutations", async () => {
-    let updateCounter = 0;
-    const state = { bertinchamps: "brune" };
-    const mutations = {
-      addInfo({ state, set }) {
-        set(state, "chouffe", "blonde");
-      }
-    };
-    const store = new Store({ state, mutations, actions: {} });
-    store.on("update", null, () => updateCounter++);
-
-    expect(updateCounter).toBe(0);
-    store.commit("addInfo");
-    await nextMicroTick();
-    expect(updateCounter).toBe(1);
-    expect(store.state).toEqual({ bertinchamps: "brune", chouffe: "blonde" });
-  });
-
   test("can have getters from store", async () => {
     const state = {
       beers: {
@@ -200,6 +182,145 @@ describe("basic use", () => {
     expect((<any>store.getters).beerTasterName(1)).toBe("aaron");
   });
 
+  test("getters are memoized", async () => {
+    const state = {
+      beers: {
+        1: {
+          id: 1,
+          name: "bertinchamps",
+          tasterID: 1
+        }
+      },
+      tasters: {
+        1: {
+          id: 1,
+          name: "aaron"
+        }
+      }
+    };
+    let n = 0;
+    const getters = {
+      beerTasterName({ state }, beerID) {
+        n++;
+        return state.tasters[state.beers[beerID].tasterID].name;
+      },
+      bestBeerName({ state }) {
+        n++;
+        return state.beers[1].name;
+      },
+    };
+    const store = new Store({ state, mutations: {}, actions: {}, getters });
+    expect((<any>store.getters).bestBeerName()).toBe("bertinchamps");
+    expect((<any>store.getters).beerTasterName(1)).toBe("aaron");
+    expect(n).toBe(2);
+    expect((<any>store.getters).bestBeerName()).toBe("bertinchamps");
+    expect((<any>store.getters).beerTasterName(1)).toBe("aaron");
+    expect(n).toBe(2);
+  });
+
+  test("getters taking Array as argument aren't memoized", async () => {
+    const state = {
+      beers: {
+        1: {
+          id: 1,
+          name: "bertinchamps",
+          tasterID: 1
+        }
+      },
+    };
+    let n = 0;
+    const getters = {
+      getBeerNames({ state }, beerIDs) {
+        n++;
+        return beerIDs.map(beerID => {
+          return state.beers[beerID].name;
+        });
+      }
+    };
+    const store = new Store({ state, mutations: {}, actions: {}, getters });
+    expect((<any>store.getters).getBeerNames([1])).toEqual(["bertinchamps"]);
+    expect(n).toBe(1);
+    expect((<any>store.getters).getBeerNames([1])).toEqual(["bertinchamps"]);
+    expect(n).toBe(2);
+  });
+
+  test("getters cache is nuked on store changes", async () => {
+    const state = {
+      beers: {
+        1: {
+          id: 1,
+          name: "bertinchamps",
+          tasterID: 1
+        }
+      },
+      tasters: {
+        1: {
+          id: 1,
+          name: "aaron"
+        },
+        2: {
+          id: 2,
+          name: "gery"
+        }
+      }
+    };
+    const mutations = {
+      changeTaster({ state }, {beerID, tasterID}) {
+        state.beers[beerID].tasterID = tasterID;
+      }
+    };
+    let n = 0;
+    const getters = {
+      beerTasterName({ state }, beerID) {
+        n++;
+        return state.tasters[state.beers[beerID].tasterID].name;
+      },
+    };
+    const store = new Store({ state, mutations: mutations, actions: {}, getters });
+    expect((<any>store.getters).beerTasterName(1)).toBe("aaron");
+    expect(n).toBe(1);
+    expect((<any>store.getters).beerTasterName(1)).toBe("aaron");
+    expect(n).toBe(1);
+
+    store.commit('changeTaster', {beerID: 1, tasterID: 2});
+    await nextTick();
+
+    expect((<any>store.getters).beerTasterName(1)).toBe("gery");
+    expect(n).toBe(2);
+  });
+
+  test("getters cache is disabled during a mutation", async () => {
+    const state = {
+      beers: {
+        1: {
+          id: 1,
+          name: "bertinchamps"
+        },
+      }
+    };
+    const mutations = {
+      renameBeer({ state, getters }, beerID) {
+        expect(getters.beerName(beerID)).toBe('bertinchamps');
+        state.beers[1].name = 'chouffe';
+        expect(getters.beerName(beerID)).toBe('chouffe');
+      }
+    };
+    let n = 0;
+    const getters = {
+      beerName({ state }, beerID) {
+        n++;
+        return state.beers[beerID].name;
+      },
+    };
+    const store = new Store({ state, mutations: mutations, actions: {}, getters });
+
+    store.commit('renameBeer', 1);
+    expect((<any>store.getters).beerName(1)).toBe('chouffe');
+    await nextTick();
+
+    expect(n).toBe(3);
+  });
+
   test("getters given to actions", async () => {
     expect.assertions(3);
     const state = {
@@ -429,10 +550,13 @@ describe("connecting a component to store", () => {
         state.todos.push({ msg });
       }
     };
-    function mapStateToProps(s) {
+    function mapStoreToProps(s) {
       return { todos: s.todos };
     }
-    const TodoApp = connect(mapStateToProps)(App);
+    const TodoApp = connect(
+      App,
+      mapStoreToProps
+    );
     const store = new Store({ state, mutations });
     (<any>env).store = store;
     const app = new TodoApp(env);
@@ -452,7 +576,7 @@ describe("connecting a component to store", () => {
         state.todos[0].title = title;
       }
     };
-    function mapStateToProps(s) {
+    function mapStoreToProps(s) {
       return { todos: s.todos };
     }
     const store = new Store({ state, mutations });
@@ -469,13 +593,15 @@ describe("connecting a component to store", () => {
     class App extends Component<any, any, any> {}
 
     const DeepTodoApp = connect(
-      mapStateToProps,
+      App,
+      mapStoreToProps,
       { deep: true }
-    )(App);
+    );
     const ShallowTodoApp = connect(
-      mapStateToProps,
+      App,
+      mapStoreToProps,
       { deep: false }
-    )(App);
+    );
     (<any>env).store = store;
     const deepTodoApp = new DeepTodoApp(env);
     const shallowTodoApp = new ShallowTodoApp(env);
@@ -494,6 +620,51 @@ describe("connecting a component to store", () => {
     expect(shallowFix.innerHTML).toMatchSnapshot();
   });
 
+  test("connecting a component to a local store", async () => {
+    env.qweb.addTemplates(`
+      <templates>
+        <div t-name="App">
+          <t t-foreach="props.todos" t-as="todo" t-key="todo">
+            <t t-widget="Todo" msg="todo.msg"/>
+          </t>
+        </div>
+        <span t-name="Todo"><t t-esc="props.msg"/></span>
+      </templates>
+      `);
+    class App extends Component<any, any, any> {
+      widgets = { Todo };
+    }
+    class Todo extends Component<any, any, any> {}
+
+    (<any>env).store = new Store({});
+    const store = new Store({
+      state: { todos: [] },
+      mutations: {
+        addTodo({ state }, msg) {
+          state.todos.push({ msg });
+        }
+      }
+    });
+    function mapStoreToProps(s) {
+      return { todos: s.todos };
+    }
+    const TodoApp = connect(
+      App,
+      mapStoreToProps,
+      {
+        getStore: () => store
+      }
+    );
+    const app = new TodoApp(env);
+
+    await app.mount(fixture);
+    expect(fixture.innerHTML).toMatchSnapshot();
+
+    (<any>app.__owl__).store.commit("addTodo", "hello");
+    await nextTick();
+    expect(fixture.innerHTML).toMatchSnapshot();
+  });
+
   test("connected child components with custom hooks", async () => {
     let steps: any = [];
     env.qweb.addTemplate("Child", `<div/>`);
@@ -506,7 +677,10 @@ describe("connecting a component to store", () => {
       }
     }
 
-    const ConnectedChild = connect(s => s)(Child);
+    const ConnectedChild = connect(
+      Child,
+      s => s
+    );
 
     env.qweb.addTemplate(
       "Parent",
@@ -548,10 +722,13 @@ describe("connecting a component to store", () => {
 
     env.qweb.addTemplate("TodoItem", `<span><t t-esc="props.text"/></span>`);
     class TodoItem extends Component<any, any, any> {}
-    const ConnectedTodo = connect((state, props) => {
+    const ConnectedTodo = connect(
-      const todo = state.todos.find(t => t.id === props.id);
+      TodoItem,
-      return todo;
+      (state, props) => {
-    })(TodoItem);
+        const todo = state.todos.find(t => t.id === props.id);
+        return todo;
+      }
+    );
 
     env.qweb.addTemplate(
       "TodoList",
@@ -565,10 +742,13 @@ describe("connecting a component to store", () => {
       widgets = { ConnectedTodo };
     }
 
-    function mapStateToProps(state) {
+    function mapStoreToProps(state) {
       return { todos: state.todos };
     }
-    const ConnectedTodoList = connect(mapStateToProps)(TodoList);
+    const ConnectedTodoList = connect(
+      TodoList,
+      mapStoreToProps
+    );
 
     (<any>env).store = store;
     const app = new ConnectedTodoList(env);
@@ -606,13 +786,16 @@ describe("connecting a component to store", () => {
       </div>`
     );
     class TodoItem extends Component<any, any, any> {}
-    const ConnectedTodo = connect((state, props, getters) => {
+    const ConnectedTodo = connect(
-      const todo = state.todos.find(t => t.id === props.id);
+      TodoItem,
-      return {
+      (state, props, getters) => {
-        activeTodoText: getters.text(todo.id),
+        const todo = state.todos.find(t => t.id === props.id);
-        importantTodoText: getters.importantTodoText()
+        return {
-      };
+          activeTodoText: getters.text(todo.id),
-    })(TodoItem);
+          importantTodoText: getters.importantTodoText()
+        };
+      }
+    );
 
     env.qweb.addTemplate(
       "TodoList",
@@ -626,10 +809,13 @@ describe("connecting a component to store", () => {
       widgets = { ConnectedTodo };
     }
 
-    function mapStateToProps(state) {
+    function mapStoreToProps(state) {
       return { todos: state.todos };
     }
-    const ConnectedTodoList = connect(mapStateToProps)(TodoList);
+    const ConnectedTodoList = connect(
+      TodoList,
+      mapStoreToProps
+    );
 
     (<any>env).store = store;
     const app = new ConnectedTodoList(env);
@@ -643,9 +829,12 @@ describe("connecting a component to store", () => {
   test("connected component is updated when props are updated", async () => {
     env.qweb.addTemplate("Beer", `<span><t t-esc="props.name"/></span>`);
     class Beer extends Component<any, any, any> {}
-    const ConnectedBeer = connect((state, props) => {
+    const ConnectedBeer = connect(
-      return state.beers[props.id];
+      Beer,
-    })(Beer);
+      (state, props) => {
+        return state.beers[props.id];
+      }
+    );
 
     env.qweb.addTemplate(
       "App",
@@ -691,10 +880,13 @@ describe("connecting a component to store", () => {
     const store = new Store({ state, mutations });
     (<any>env).store = store;
 
-    function mapStateToProps(state) {
+    function mapStoreToProps(state) {
       return { beers: state.beers, otherKey: 1 };
     }
-    const ConnectedApp = connect(mapStateToProps)(App);
+    const ConnectedApp = connect(
+      App,
+      mapStoreToProps
+    );
     const app = new ConnectedApp(env);
 
     await app.mount(fixture);
@@ -717,13 +909,16 @@ describe("connecting a component to store", () => {
         </div>`
     );
     class Beer extends Component<any, any, any> {}
-    const ConnectedBeer = connect((state, props) => {
+    const ConnectedBeer = connect(
-      return {
+      Beer,
-        selected: state.beers[props.id],
+      (state, props) => {
-        consumed: state.beers[state.consumedID] || null,
+        return {
-        taster: state.taster
+          selected: state.beers[props.id],
-      };
+          consumed: state.beers[state.consumedID] || null,
-    })(Beer);
+          taster: state.taster
+        };
+      }
+    );
 
     env.qweb.addTemplate(
       "App",
@@ -786,13 +981,16 @@ describe("connecting a component to store", () => {
         </div>`
     );
     class Beer extends Component<any, any, any> {}
-    const ConnectedBeer = connect((state, props) => {
+    const ConnectedBeer = connect(
-      return {
+      Beer,
-        selected: state.beers[props.id],
+      (state, props) => {
-        consumed: state.beers[state.consumedID] || null,
+        return {
-        taster: state.taster
+          selected: state.beers[props.id],
-      };
+          consumed: state.beers[state.consumedID] || null,
-    })(Beer);
+          taster: state.taster
+        };
+      }
+    );
 
     env.qweb.addTemplate(
       "App",
@@ -883,18 +1081,24 @@ describe("connecting a component to store", () => {
     class Parent extends Component<any, any, any> {
       widgets = { Child: ConnectedChild };
     }
-    const ConnectedParent = connect(function(s) {
+    const ConnectedParent = connect(
-      steps.push("parent");
+      Parent,
-      return { current: s.current, isvisible: s.isvisible };
+      function(s) {
-    })(Parent);
+        steps.push("parent");
+        return { current: s.current, isvisible: s.isvisible };
+      }
+    );
 
     env.qweb.addTemplate("Child", `<span><t t-esc="props.msg"/></span>`);
     class Child extends Component<any, any, any> {}
 
-    const ConnectedChild = connect(function(s, props) {
+    const ConnectedChild = connect(
-      steps.push("child");
+      Child,
-      return { msg: s.msg[props.key] };
+      function(s, props) {
-    })(Child);
+        steps.push("child");
+        return { msg: s.msg[props.key] };
+      }
+    );
 
     const state = { current: "a", msg: { a: "a", b: "b" } };
     const mutations = {
@@ -927,9 +1131,12 @@ describe("connecting a component to store", () => {
         steps.push("patched");
       }
     }
-    const ConnectedApp = connect(function(s) {
+    const ConnectedApp = connect(
-      return { msg: s.msg };
+      App,
-    })(App);
+      function(s) {
+        return { msg: s.msg };
+      }
+    );
 
     const state = { msg: "a" };
     const mutations = {

tools/benchmarks/odoo-widgets-12.0/app.js

@@ -1,4 +1,9 @@
-import { buildData, startMeasure, stopMeasure } from "../shared/utils.js";
+import {
+  buildData,
+  startMeasure,
+  stopMeasure,
+  formatNumber
+} from "../shared/utils.js";
 
 odoo.define("app", function(require) {
   const Widget = require("web.Widget");
@@ -97,14 +102,23 @@ odoo.define("app", function(require) {
       "click .o_btn_msg.10000": function() {
         this.addMessages(10000);
       },
-      "click .o_btn_msg.50000": function() {
+      "click .o_btn_msg.30000": function() {
-        this.addMessages(50000);
+        this.addMessages(30000);
       },
       "click .updateSomeMessages": function() {
         this.updateSomeMessages();
       },
       "click .clear": function() {
         this.clear();
+      },
+      "click .o_multiple": function() {
+        this.multipleFlag = !this.multipleFlag;
+      },
+      "click .o_clear": function() {
+        this.clearFlag = !this.clearFlag;
+      },
+      "click .clear-log": function() {
+        this.$log[0].innerHTML = "";
       }
     },
     custom_events: {
@@ -116,11 +130,15 @@ odoo.define("app", function(require) {
       this.widgets = {};
       this.isInDom = false;
       this.messageCount = 0;
+      this.multipleFlag = false;
+      this.clearFlag = false;
     },
 
     start: function() {
       this.$content = this.$(".content");
       this.$msgCount = this.$(".message_count");
+      this.$log = this.$(".log-content");
+      this.log("Benchmarking odoo widgets, 12.0");
     },
     on_attach_callback: function() {
       this.isInDom = true;
@@ -144,34 +162,41 @@ odoo.define("app", function(require) {
     },
 
     addMessages: function(n) {
-      var self = this;
+      const self = this;
-      startMeasure("add " + n);
+      this.benchmark("add " + n, () => {
-      const defs = [];
+        const defs = [];
-      const messages = buildData(n);
+        const messages = buildData(n);
-      for (let message of messages) {
+        for (let message of messages) {
-        const widget = new Message(this, message);
+          const widget = new Message(this, message);
-        this.widgets[message.id] = widget;
+          this.widgets[message.id] = widget;
-        defs.push(widget.appendTo("<div>"));
+          defs.push(widget.appendTo("<div>"));
-      }
+        }
-      $.when
+        return $.when
-        .apply($, defs)
+          .apply($, defs)
-        .then(function() {
+          .then(function() {
-          for (let message of messages) {
+            for (let message of messages) {
-            let widget = self.widgets[message.id];
+              let widget = self.widgets[message.id];
-            dom.append(self.$content, widget.$el, {
+              dom.append(self.$content, widget.$el, {
-              in_DOM: this.isInDom,
+                in_DOM: this.isInDom,
-              callbacks: [{ widget: widget }]
+                callbacks: [{ widget: widget }]
-            });
+              });
-          }
+            }
-        })
+          })
-        .then(function() {
+          .then(function() {
-          self.messageCount += n;
+            self.messageCount += n;
-          self.updateMessageCount();
+            self.updateMessageCount();
-          stopMeasure();
+          });
-        });
+      });
     },
     clear: function() {
       startMeasure("clear");
+      this._clear();
+      stopMeasure(info => {
+        this.log(info.msg);
+      });
+    },
+
+    _clear: function() {
       this.$content.empty();
       for (let key in this.widgets) {
         this.widgets[key].destroy();
@@ -179,15 +204,14 @@ odoo.define("app", function(require) {
       }
       this.messageCount = 0;
       this.updateMessageCount();
-      stopMeasure();
     },
     updateSomeMessages: function() {
-      startMeasure("update every 10th");
+      this.benchmark("update every 10th", () => {
-      const widgets = Object.values(this.widgets);
+        const widgets = Object.values(this.widgets);
-      for (let i = 0; i < widgets.length; i += 10) {
+        for (let i = 0; i < widgets.length; i += 10) {
-        widgets[i].update();
+          widgets[i].update();
-      }
+        }
-      stopMeasure();
+      });
     },
     _onRemoveMessage: function(ev) {
       startMeasure("remove message");
@@ -196,6 +220,65 @@ odoo.define("app", function(require) {
       this.messageCount--;
       this.updateMessageCount();
       stopMeasure();
+    },
+
+    benchmark: function(message, fn, callback) {
+      if (this.multipleFlag) {
+        const N = 20;
+        let n = N;
+        let total = 0;
+        let cb = info => {
+          let finalize = () => {
+            n--;
+            total += info.delta;
+            if (n === 0) {
+              const avg = total / N;
+              this.log(`Average: ${formatNumber(avg)}ms`, true);
+              if (callback) {
+                callback();
+              }
+            } else {
+              this._benchmark(message, fn, cb);
+            }
+          };
+
+          if (this.clearFlag) {
+            this._benchmark("clear", this._clear.bind(this), finalize, false);
+          } else {
+            finalize();
+          }
+        };
+        this._benchmark(message, fn, cb);
+      } else {
+        this._benchmark(message, fn, callback);
+      }
+    },
+
+    _benchmark: function(message, fn, cb, log = true) {
+      setTimeout(() => {
+        startMeasure(message);
+        const benchmark = fn();
+        (benchmark && benchmark.then ? benchmark : $.when()).then(() => {
+          stopMeasure(info => {
+            if (log) {
+              this.log(info.msg);
+            }
+            if (cb) {
+              cb(info);
+            }
+          });
+        }, 10);
+      });
+    },
+
+    log: function(str, isBold) {
+      const div = document.createElement("div");
+      if (isBold) {
+        div.classList.add("bold");
+      }
+      div.textContent = `> ${str}`;
+      this.$log[0].appendChild(div);
+      this.$log[0].scrollTop = this.$log[0].scrollHeight;
     }
   });
 

tools/benchmarks/odoo-widgets-12.0/templates.xml

@@ -0,0 +1,47 @@
+<templates>
+    <div class="main" t-name="root">
+        <div class="left-thing">
+            <div class="title">Actions</div>
+            <div class="panel">
+                <button class="o_btn_msg 100">Add 100 messages</button>
+                <button class="o_btn_msg 1000">Add 1k messages</button>
+                <button class="o_btn_msg 10000">Add 10k messages</button>
+                <button class="o_btn_msg 30000">Add 30k messages</button>
+                <button class="updateSomeMessages">Update every 10th message</button>
+                <button class="clear">Clear</button>
+            </div>
+            <div class="flags">
+                <div>
+                    <input type="checkbox" class="o_multiple" id="multipleflag" />
+                    <label for="multipleflag">Do it 20x</label>
+                </div>
+                <div>
+                    <input type="checkbox" class="o_clear" id="clearFlag" />
+                    <label for="clearFlag">Clear after</label>
+                </div>
+            </div>
+            <div class="info message_count">
+                Number of messages: 0
+            </div>
+            <div class="title">Log <span class="clear-log">(clear)</span></div>
+            <div class="log">
+                <div class="log-content"/>
+            </div>
+        </div>
+        <div class="right-thing">
+            <div class="content">
+            </div>
+        </div>
+    </div>
+
+    <div t-name="message" class="message">
+        <span class="author"><t t-esc="widget.author"/></span>
+        <span class="msg"><t t-esc="widget.msg"/></span>
+        <button class="remove">Remove</button>
+    </div>
+
+  <div t-name="counter">
+    <button class="o_increment"></button>
+  </div>
+
+</templates>

tools/benchmarks/odoo-widgets-12.3/app.js

@@ -1,4 +1,9 @@
-import { buildData, startMeasure, stopMeasure } from "../shared/utils.js";
+import {
+  buildData,
+  startMeasure,
+  stopMeasure,
+  formatNumber
+} from "../shared/utils.js";
 
 odoo.define("app", function(require) {
   const Widget = require("web.Widget");
@@ -97,14 +102,23 @@ odoo.define("app", function(require) {
       "click .o_btn_msg.10000": function() {
         this.addMessages(10000);
       },
-      "click .o_btn_msg.50000": function() {
+      "click .o_btn_msg.30000": function() {
-        this.addMessages(50000);
+        this.addMessages(30000);
       },
       "click .updateSomeMessages": function() {
         this.updateSomeMessages();
       },
       "click .clear": function() {
         this.clear();
+      },
+      "click .o_multiple": function() {
+        this.multipleFlag = !this.multipleFlag;
+      },
+      "click .o_clear": function() {
+        this.clearFlag = !this.clearFlag;
+      },
+      "click .clear-log": function() {
+        this.$log[0].innerHTML = "";
       }
     },
     custom_events: {
@@ -116,11 +130,15 @@ odoo.define("app", function(require) {
       this.widgets = {};
       this.isInDom = false;
       this.messageCount = 0;
+      this.multipleFlag = false;
+      this.clearFlag = false;
     },
 
     start: function() {
       this.$content = this.$(".content");
       this.$msgCount = this.$(".message_count");
+      this.$log = this.$(".log-content");
+      this.log("Benchmarking odoo widgets, 12.3");
     },
     on_attach_callback: function() {
       this.isInDom = true;
@@ -144,34 +162,41 @@ odoo.define("app", function(require) {
     },
 
     addMessages: function(n) {
-      var self = this;
+      const self = this;
-      startMeasure("add " + n);
+      this.benchmark("add " + n, () => {
-      const defs = [];
+        const defs = [];
-      const messages = buildData(n);
+        const messages = buildData(n);
-      for (let message of messages) {
+        for (let message of messages) {
-        const widget = new Message(this, message);
+          const widget = new Message(this, message);
-        this.widgets[message.id] = widget;
+          this.widgets[message.id] = widget;
-        defs.push(widget.appendTo("<div>"));
+          defs.push(widget.appendTo("<div>"));
-      }
+        }
-      $.when
+        return $.when
-        .apply($, defs)
+          .apply($, defs)
-        .then(function() {
+          .then(function() {
-          for (let message of messages) {
+            for (let message of messages) {
-            let widget = self.widgets[message.id];
+              let widget = self.widgets[message.id];
-            dom.append(self.$content, widget.$el, {
+              dom.append(self.$content, widget.$el, {
-              in_DOM: this.isInDom,
+                in_DOM: this.isInDom,
-              callbacks: [{ widget: widget }]
+                callbacks: [{ widget: widget }]
-            });
+              });
-          }
+            }
-        })
+          })
-        .then(function() {
+          .then(function() {
-          self.messageCount += n;
+            self.messageCount += n;
-          self.updateMessageCount();
+            self.updateMessageCount();
-          stopMeasure();
+          });
-        });
+      });
     },
     clear: function() {
       startMeasure("clear");
+      this._clear();
+      stopMeasure(info => {
+        this.log(info.msg);
+      });
+    },
+
+    _clear: function() {
       this.$content.empty();
       for (let key in this.widgets) {
         this.widgets[key].destroy();
@@ -179,15 +204,14 @@ odoo.define("app", function(require) {
       }
       this.messageCount = 0;
       this.updateMessageCount();
-      stopMeasure();
     },
     updateSomeMessages: function() {
-      startMeasure("update every 10th");
+      this.benchmark("update every 10th", () => {
-      const widgets = Object.values(this.widgets);
+        const widgets = Object.values(this.widgets);
-      for (let i = 0; i < widgets.length; i += 10) {
+        for (let i = 0; i < widgets.length; i += 10) {
-        widgets[i].update();
+          widgets[i].update();
-      }
+        }
-      stopMeasure();
+      });
     },
     _onRemoveMessage: function(ev) {
       startMeasure("remove message");
@@ -196,6 +220,65 @@ odoo.define("app", function(require) {
       this.messageCount--;
       this.updateMessageCount();
       stopMeasure();
+    },
+
+    benchmark: function(message, fn, callback) {
+      if (this.multipleFlag) {
+        const N = 20;
+        let n = N;
+        let total = 0;
+        let cb = info => {
+          let finalize = () => {
+            n--;
+            total += info.delta;
+            if (n === 0) {
+              const avg = total / N;
+              this.log(`Average: ${formatNumber(avg)}ms`, true);
+              if (callback) {
+                callback();
+              }
+            } else {
+              this._benchmark(message, fn, cb);
+            }
+          };
+
+          if (this.clearFlag) {
+            this._benchmark("clear", this._clear.bind(this), finalize, false);
+          } else {
+            finalize();
+          }
+        };
+        this._benchmark(message, fn, cb);
+      } else {
+        this._benchmark(message, fn, callback);
+      }
+    },
+
+    _benchmark: function(message, fn, cb, log = true) {
+      setTimeout(() => {
+        startMeasure(message);
+        const benchmark = fn();
+        (benchmark && benchmark.then ? benchmark : $.when()).then(() => {
+          stopMeasure(info => {
+            if (log) {
+              this.log(info.msg);
+            }
+            if (cb) {
+              cb(info);
+            }
+          });
+        }, 10);
+      });
+    },
+
+    log: function(str, isBold) {
+      const div = document.createElement("div");
+      if (isBold) {
+        div.classList.add("bold");
+      }
+      div.textContent = `> ${str}`;
+      this.$log[0].appendChild(div);
+      this.$log[0].scrollTop = this.$log[0].scrollHeight;
     }
   });
 

tools/benchmarks/odoo-widgets-12.3/templates.xml

@@ -0,0 +1,47 @@
+<templates>
+    <div class="main" t-name="root">
+        <div class="left-thing">
+            <div class="title">Actions</div>
+            <div class="panel">
+                <button class="o_btn_msg 100">Add 100 messages</button>
+                <button class="o_btn_msg 1000">Add 1k messages</button>
+                <button class="o_btn_msg 10000">Add 10k messages</button>
+                <button class="o_btn_msg 30000">Add 30k messages</button>
+                <button class="updateSomeMessages">Update every 10th message</button>
+                <button class="clear">Clear</button>
+            </div>
+            <div class="flags">
+                <div>
+                    <input type="checkbox" class="o_multiple" id="multipleflag" />
+                    <label for="multipleflag">Do it 20x</label>
+                </div>
+                <div>
+                    <input type="checkbox" class="o_clear" id="clearFlag" />
+                    <label for="clearFlag">Clear after</label>
+                </div>
+            </div>
+            <div class="info message_count">
+                Number of messages: 0
+            </div>
+            <div class="title">Log <span class="clear-log">(clear)</span></div>
+            <div class="log">
+                <div class="log-content"/>
+            </div>
+        </div>
+        <div class="right-thing">
+            <div class="content">
+            </div>
+        </div>
+    </div>
+
+    <div t-name="message" class="message">
+        <span class="author"><t t-esc="widget.author"/></span>
+        <span class="msg"><t t-esc="widget.msg"/></span>
+        <button class="remove">Remove</button>
+    </div>
+
+  <div t-name="counter">
+    <button class="o_increment"></button>
+  </div>
+
+</templates>

tools/benchmarks/owl-0.10.0/app.js

@@ -0,0 +1,173 @@
+import {
+  buildData,
+  startMeasure,
+  stopMeasure,
+  formatNumber
+} from "../shared/utils.js";
+
+//------------------------------------------------------------------------------
+// Likes Counter Widget
+//------------------------------------------------------------------------------
+class Counter extends owl.Component {
+  state = { counter: 0 };
+  template = "Counter";
+
+  increment() {
+    this.state.counter++;
+  }
+}
+
+//------------------------------------------------------------------------------
+// Message Widget
+//------------------------------------------------------------------------------
+class Message extends owl.Component {
+  widgets = { Counter };
+  template = "Message";
+
+  shouldUpdate(nextProps) {
+    return nextProps !== this.props;
+  }
+  removeMessage() {
+    this.trigger("remove_message", {
+      id: this.props.id
+    });
+  }
+}
+
+//------------------------------------------------------------------------------
+// Root Widget
+//------------------------------------------------------------------------------
+class App extends owl.Component {
+  widgets = { Message };
+  state = { messages: [], multipleFlag: false, clearAfterFlag: false };
+  template = "App";
+
+  mounted() {
+    this.log(
+      `Benchmarking Owl v${owl._version} (build date: ${
+        owl._date
+      })`
+    );
+  }
+
+  benchmark(message, fn, callback) {
+    if (this.state.multipleFlag) {
+      const N = 20;
+      let n = N;
+      let total = 0;
+      let cb = info => {
+        let finalize = () => {
+          n--;
+          total += info.delta;
+          if (n === 0) {
+            const avg = total / N;
+            this.log(`Average: ${formatNumber(avg)}ms`, true);
+            if (callback) {
+              callback();
+            }
+          } else {
+            this._benchmark(message, fn, cb);
+          }
+        };
+
+        if (this.state.clearAfterFlag) {
+          this._benchmark(
+            "clear",
+            () => {
+              this.state.messages = [];
+            },
+            finalize,
+            false
+          );
+        } else {
+          finalize();
+        }
+      };
+      this._benchmark(message, fn, cb);
+    } else {
+      this._benchmark(message, fn, callback);
+    }
+  }
+
+  _benchmark(message, fn, cb, log = true) {
+    setTimeout(() => {
+      startMeasure(message);
+      fn();
+      stopMeasure(info => {
+        if (log) {
+          this.log(info.msg);
+        }
+        if (cb) {
+          cb(info);
+        }
+      });
+    }, 10);
+  }
+
+  addMessages(n) {
+    this.benchmark("add " + n, () => {
+      const newMessages = buildData(n);
+      this.state.messages.push.apply(this.state.messages, newMessages);
+    });
+  }
+
+  clear() {
+    this._benchmark("clear", () => {
+      this.state.messages = [];
+    });
+  }
+
+  updateSomeMessages() {
+    this.benchmark("update every 10th", () => {
+      const messages = this.state.messages;
+      for (let i = 0; i < this.state.messages.length; i += 10) {
+        const msg = Object.assign({}, messages[i]);
+        msg.author += "!!!";
+        this.set(messages, i, msg);
+      }
+    });
+  }
+
+  removeMessage(data) {
+    this.benchmark("remove message", () => {
+      const index = this.state.messages.findIndex(m => m.id === data.id);
+      this.state.messages.splice(index, 1);
+    });
+  }
+
+  log(str, isBold) {
+    const div = document.createElement("div");
+    if (isBold) {
+      div.classList.add("bold");
+    }
+    div.textContent = `> ${str}`;
+    this.refs.log.appendChild(div);
+    this.refs.log.scrollTop = this.refs.log.scrollHeight;
+  }
+
+  clearLog() {
+    this.refs.log.innerHTML = "";
+  }
+
+  toggleMultiple() {
+    this.state.multipleFlag = !this.state.multipleFlag;
+  }
+
+  toggleClear() {
+    this.state.clearAfterFlag = !this.state.clearAfterFlag;
+  }
+}
+
+//------------------------------------------------------------------------------
+// Application initialization
+//------------------------------------------------------------------------------
+async function start() {
+  const templates = await owl.utils.loadTemplates("templates.xml");
+  const env = {
+    qweb: new owl.QWeb(templates)
+  };
+  const app = new App(env);
+  app.mount(document.body);
+}
+
+start();

tools/benchmarks/owl-0.10.0/templates.xml

@@ -0,0 +1,50 @@
+<templates>
+  <div t-name="App" class="main">
+      <div class="left-thing">
+        <div class="title">Actions</div>
+        <div class="panel">
+          <button t-on-click="addMessages(100)">Add 100 messages</button>
+          <button t-on-click="addMessages(1000)">Add 1k messages</button>
+          <button t-on-click="addMessages(10000)">Add 10k messages</button>
+          <button t-on-click="addMessages(30000)">Add 30k messages</button>
+          <button t-on-click="updateSomeMessages">Update every 10th messages</button>
+          <button t-on-click="clear">Clear</button>
+        </div>
+        <div class="flags">
+            <div>
+                <input type="checkbox" id="multipleflag" t-on-change="toggleMultiple" t-att-checked="state.multipleFlag"/>
+                <label for="multipleflag">Do it 20x</label>
+            </div>
+            <div>
+                <input type="checkbox" id="clearFlag" t-on-change="toggleClear"  t-att-checked="state.clearAfterFlag"/>
+                <label for="clearFlag">Clear after</label>
+            </div>
+        </div>
+        <div class="info">Number of messages: <t t-esc="state.messages.length"/></div>
+        <hr/>
+        <div class="title">Log <span class="clear-log" t-on-click="clearLog">(clear)</span></div>
+        <div class="log">
+            <div class="log-content" t-ref="'log'"/>
+        </div>
+      </div>
+      <div class="right-thing">
+          <div class="content" t-on-remove-message="removeMessage">
+              <t t-foreach="state.messages" t-as="message">
+                  <t t-widget="Message" t-key="message.id" t-props="message" t-on-remove_message="removeMessage"/>
+              </t>
+          </div>
+      </div>
+  </div>
+
+  <div t-name="Message" class="message">
+    <span class="author"><t t-esc="props.author"/></span>
+    <span class="msg"><t t-esc="props.msg"/></span>
+    <button class="remove" t-on-click="removeMessage">Remove</button>
+    <t t-widget="Counter"/>
+  </div>
+
+  <div t-name="Counter">
+    <button t-on-click="increment">Value: <t t-esc="state.counter"/></button>
+  </div>
+
+</templates>

tools/benchmarks/owl-0.11.0/app.js

@@ -0,0 +1,170 @@
+import {
+  buildData,
+  startMeasure,
+  stopMeasure,
+  formatNumber
+} from "../shared/utils.js";
+
+//------------------------------------------------------------------------------
+// Likes Counter Widget
+//------------------------------------------------------------------------------
+class Counter extends owl.Component {
+  state = { counter: 0 };
+
+  increment() {
+    this.state.counter++;
+  }
+}
+
+//------------------------------------------------------------------------------
+// Message Widget
+//------------------------------------------------------------------------------
+class Message extends owl.Component {
+  widgets = { Counter };
+
+  shouldUpdate(nextProps) {
+    return nextProps !== this.props;
+  }
+  removeMessage() {
+    this.trigger("remove_message", {
+      id: this.props.id
+    });
+  }
+}
+
+//------------------------------------------------------------------------------
+// Root Widget
+//------------------------------------------------------------------------------
+class App extends owl.Component {
+  widgets = { Message };
+  state = { messages: [], multipleFlag: false, clearAfterFlag: false };
+
+  mounted() {
+    this.log(
+      `Benchmarking Owl v${owl._version} (build date: ${
+        owl._date
+      })`
+    );
+  }
+
+  benchmark(message, fn, callback) {
+    if (this.state.multipleFlag) {
+      const N = 20;
+      let n = N;
+      let total = 0;
+      let cb = info => {
+        let finalize = () => {
+          n--;
+          total += info.delta;
+          if (n === 0) {
+            const avg = total / N;
+            this.log(`Average: ${formatNumber(avg)}ms`, true);
+            if (callback) {
+              callback();
+            }
+          } else {
+            this._benchmark(message, fn, cb);
+          }
+        };
+
+        if (this.state.clearAfterFlag) {
+          this._benchmark(
+            "clear",
+            () => {
+              this.state.messages = [];
+            },
+            finalize,
+            false
+          );
+        } else {
+          finalize();
+        }
+      };
+      this._benchmark(message, fn, cb);
+    } else {
+      this._benchmark(message, fn, callback);
+    }
+  }
+
+  _benchmark(message, fn, cb, log = true) {
+    setTimeout(() => {
+      startMeasure(message);
+      fn();
+      stopMeasure(info => {
+        if (log) {
+          this.log(info.msg);
+        }
+        if (cb) {
+          cb(info);
+        }
+      });
+    }, 10);
+  }
+
+  addMessages(n) {
+    this.benchmark("add " + n, () => {
+      const newMessages = buildData(n);
+      this.state.messages.push.apply(this.state.messages, newMessages);
+    });
+  }
+
+  clear() {
+    this._benchmark("clear", () => {
+      this.state.messages = [];
+    });
+  }
+
+  updateSomeMessages() {
+    this.benchmark("update every 10th", () => {
+      const messages = this.state.messages;
+      for (let i = 0; i < this.state.messages.length; i += 10) {
+        const msg = Object.assign({}, messages[i]);
+        msg.author += "!!!";
+        this.set(messages, i, msg);
+      }
+    });
+  }
+
+  removeMessage(data) {
+    this.benchmark("remove message", () => {
+      const index = this.state.messages.findIndex(m => m.id === data.id);
+      this.state.messages.splice(index, 1);
+    });
+  }
+
+  log(str, isBold) {
+    const div = document.createElement("div");
+    if (isBold) {
+      div.classList.add("bold");
+    }
+    div.textContent = `> ${str}`;
+    this.refs.log.appendChild(div);
+    this.refs.log.scrollTop = this.refs.log.scrollHeight;
+  }
+
+  clearLog() {
+    this.refs.log.innerHTML = "";
+  }
+
+  toggleMultiple() {
+    this.state.multipleFlag = !this.state.multipleFlag;
+  }
+
+  toggleClear() {
+    this.state.clearAfterFlag = !this.state.clearAfterFlag;
+  }
+}
+
+//------------------------------------------------------------------------------
+// Application initialization
+//------------------------------------------------------------------------------
+async function start() {
+  const templates = await owl.utils.loadTemplates("templates.xml");
+  const env = {
+    qweb: new owl.QWeb(templates)
+  };
+  const app = new App(env);
+  app.mount(document.body);
+}
+
+start();

tools/benchmarks/owl-0.11.0/templates.xml

@@ -0,0 +1,50 @@
+<templates>
+  <div t-name="App" class="main">
+      <div class="left-thing">
+        <div class="title">Actions</div>
+        <div class="panel">
+          <button t-on-click="addMessages(100)">Add 100 messages</button>
+          <button t-on-click="addMessages(1000)">Add 1k messages</button>
+          <button t-on-click="addMessages(10000)">Add 10k messages</button>
+          <button t-on-click="addMessages(30000)">Add 30k messages</button>
+          <button t-on-click="updateSomeMessages">Update every 10th messages</button>
+          <button t-on-click="clear">Clear</button>
+        </div>
+        <div class="flags">
+            <div>
+                <input type="checkbox" id="multipleflag" t-on-change="toggleMultiple" t-att-checked="state.multipleFlag"/>
+                <label for="multipleflag">Do it 20x</label>
+            </div>
+            <div>
+                <input type="checkbox" id="clearFlag" t-on-change="toggleClear"  t-att-checked="state.clearAfterFlag"/>
+                <label for="clearFlag">Clear after</label>
+            </div>
+        </div>
+        <div class="info">Number of messages: <t t-esc="state.messages.length"/></div>
+        <hr/>
+        <div class="title">Log <span class="clear-log" t-on-click="clearLog">(clear)</span></div>
+        <div class="log">
+            <div class="log-content" t-ref="'log'"/>
+        </div>
+      </div>
+      <div class="right-thing">
+          <div class="content" t-on-remove-message="removeMessage">
+              <t t-foreach="state.messages" t-as="message">
+                  <t t-widget="Message" t-key="message.id" t-props="message" t-on-remove_message="removeMessage"/>
+              </t>
+          </div>
+      </div>
+  </div>
+
+  <div t-name="Message" class="message">
+    <span class="author"><t t-esc="props.author"/></span>
+    <span class="msg"><t t-esc="props.msg"/></span>
+    <button class="remove" t-on-click="removeMessage">Remove</button>
+    <t t-widget="Counter"/>
+  </div>
+
+  <div t-name="Counter">
+    <button t-on-click="increment">Value: <t t-esc="state.counter"/></button>
+  </div>
+
+</templates>

tools/benchmarks/owl-0.12.0/app.js

@@ -0,0 +1,170 @@
+import {
+  buildData,
+  startMeasure,
+  stopMeasure,
+  formatNumber
+} from "../shared/utils.js";
+
+//------------------------------------------------------------------------------
+// Likes Counter Widget
+//------------------------------------------------------------------------------
+class Counter extends owl.Component {
+  state = { counter: 0 };
+
+  increment() {
+    this.state.counter++;
+  }
+}
+
+//------------------------------------------------------------------------------
+// Message Widget
+//------------------------------------------------------------------------------
+class Message extends owl.Component {
+  widgets = { Counter };
+
+  shouldUpdate(nextProps) {
+    return nextProps !== this.props;
+  }
+  removeMessage() {
+    this.trigger("remove_message", {
+      id: this.props.id
+    });
+  }
+}
+
+//------------------------------------------------------------------------------
+// Root Widget
+//------------------------------------------------------------------------------
+class App extends owl.Component {
+  widgets = { Message };
+  state = { messages: [], multipleFlag: false, clearAfterFlag: false };
+
+  mounted() {
+    this.log(
+      `Benchmarking Owl v${owl.__info__.version} (build date: ${
+        owl.__info__.date
+      })`
+    );
+  }
+
+  benchmark(message, fn, callback) {
+    if (this.state.multipleFlag) {
+      const N = 20;
+      let n = N;
+      let total = 0;
+      let cb = info => {
+        let finalize = () => {
+          n--;
+          total += info.delta;
+          if (n === 0) {
+            const avg = total / N;
+            this.log(`Average: ${formatNumber(avg)}ms`, true);
+            if (callback) {
+              callback();
+            }
+          } else {
+            this._benchmark(message, fn, cb);
+          }
+        };
+
+        if (this.state.clearAfterFlag) {
+          this._benchmark(
+            "clear",
+            () => {
+              this.state.messages = [];
+            },
+            finalize,
+            false
+          );
+        } else {
+          finalize();
+        }
+      };
+      this._benchmark(message, fn, cb);
+    } else {
+      this._benchmark(message, fn, callback);
+    }
+  }
+
+  _benchmark(message, fn, cb, log = true) {
+    setTimeout(() => {
+      startMeasure(message);
+      fn();
+      stopMeasure(info => {
+        if (log) {
+          this.log(info.msg);
+        }
+        if (cb) {
+          cb(info);
+        }
+      });
+    }, 10);
+  }
+
+  addMessages(n) {
+    this.benchmark("add " + n, () => {
+      const newMessages = buildData(n);
+      this.state.messages.push.apply(this.state.messages, newMessages);
+    });
+  }
+
+  clear() {
+    this.benchmark("clear", () => {
+      this.state.messages = [];
+    });
+  }
+
+  updateSomeMessages() {
+    this.benchmark("update every 10th", () => {
+      const messages = this.state.messages;
+      for (let i = 0; i < this.state.messages.length; i += 10) {
+        const msg = Object.assign({}, messages[i]);
+        msg.author += "!!!";
+        this.set(messages, i, msg);
+      }
+    });
+  }
+
+  removeMessage(data) {
+    this.benchmark("remove message", () => {
+      const index = this.state.messages.findIndex(m => m.id === data.id);
+      this.state.messages.splice(index, 1);
+    });
+  }
+
+  log(str, isBold) {
+    const div = document.createElement("div");
+    if (isBold) {
+      div.classList.add("bold");
+    }
+    div.textContent = `> ${str}`;
+    this.refs.log.appendChild(div);
+    this.refs.log.scrollTop = this.refs.log.scrollHeight;
+  }
+
+  clearLog() {
+    this.refs.log.innerHTML = "";
+  }
+
+  toggleMultiple() {
+    this.state.multipleFlag = !this.state.multipleFlag;
+  }
+
+  toggleClear() {
+    this.state.clearAfterFlag = !this.state.clearAfterFlag;
+  }
+}
+
+//------------------------------------------------------------------------------
+// Application initialization
+//------------------------------------------------------------------------------
+async function start() {
+  const templates = await owl.utils.loadTemplates("templates.xml");
+  const env = {
+    qweb: new owl.QWeb(templates)
+  };
+  const app = new App(env);
+  app.mount(document.body);
+}
+
+start();

tools/benchmarks/owl-0.12.0/templates.xml

@@ -0,0 +1,50 @@
+<templates>
+  <div t-name="App" class="main">
+      <div class="left-thing">
+        <div class="title">Actions</div>
+        <div class="panel">
+          <button t-on-click="addMessages(100)">Add 100 messages</button>
+          <button t-on-click="addMessages(1000)">Add 1k messages</button>
+          <button t-on-click="addMessages(10000)">Add 10k messages</button>
+          <button t-on-click="addMessages(30000)">Add 30k messages</button>
+          <button t-on-click="updateSomeMessages">Update every 10th messages</button>
+          <button t-on-click="clear">Clear</button>
+        </div>
+        <div class="flags">
+            <div>
+                <input type="checkbox" id="multipleflag" t-on-change="toggleMultiple" t-att-checked="state.multipleFlag"/>
+                <label for="multipleflag">Do it 20x</label>
+            </div>
+            <div>
+                <input type="checkbox" id="clearFlag" t-on-change="toggleClear"  t-att-checked="state.clearAfterFlag"/>
+                <label for="clearFlag">Clear after</label>
+            </div>
+        </div>
+        <div class="info">Number of messages: <t t-esc="state.messages.length"/></div>
+        <hr/>
+        <div class="title">Log <span class="clear-log" t-on-click="clearLog">(clear)</span></div>
+        <div class="log">
+            <div class="log-content" t-ref="log"/>
+        </div>
+      </div>
+      <div class="right-thing">
+          <div class="content" t-on-remove-message="removeMessage">
+              <t t-foreach="state.messages" t-as="message">
+                  <t t-widget="Message" t-key="message.id" t-props="message" t-on-remove_message="removeMessage"/>
+              </t>
+          </div>
+      </div>
+  </div>
+
+  <div t-name="Message" class="message">
+    <span class="author"><t t-esc="props.author"/></span>
+    <span class="msg"><t t-esc="props.msg"/></span>
+    <button class="remove" t-on-click="removeMessage">Remove</button>
+    <t t-widget="Counter"/>
+  </div>
+
+  <div t-name="Counter">
+    <button t-on-click="increment">Value: <t t-esc="state.counter"/></button>
+  </div>
+
+</templates>

tools/benchmarks/owl-0.13.0/app.js

@@ -0,0 +1,170 @@
+import {
+  buildData,
+  startMeasure,
+  stopMeasure,
+  formatNumber
+} from "../shared/utils.js";
+
+//------------------------------------------------------------------------------
+// Likes Counter Widget
+//------------------------------------------------------------------------------
+class Counter extends owl.Component {
+  state = { counter: 0 };
+
+  increment() {
+    this.state.counter++;
+  }
+}
+
+//------------------------------------------------------------------------------
+// Message Widget
+//------------------------------------------------------------------------------
+class Message extends owl.Component {
+  widgets = { Counter };
+
+  shouldUpdate(nextProps) {
+    return nextProps.message !== this.props.message;
+  }
+  removeMessage() {
+    this.trigger("remove-message", {
+      id: this.props.message.id
+    });
+  }
+}
+
+//------------------------------------------------------------------------------
+// Root Widget
+//------------------------------------------------------------------------------
+class App extends owl.Component {
+  widgets = { Message };
+  state = { messages: [], multipleFlag: false, clearAfterFlag: false };
+
+  mounted() {
+    this.log(
+      `Benchmarking Owl v${owl.__info__.version} (build date: ${
+        owl.__info__.date
+      })`
+    );
+  }
+
+  benchmark(message, fn, callback) {
+    if (this.state.multipleFlag) {
+      const N = 20;
+      let n = N;
+      let total = 0;
+      let cb = info => {
+        let finalize = () => {
+          n--;
+          total += info.delta;
+          if (n === 0) {
+            const avg = total / N;
+            this.log(`Average: ${formatNumber(avg)}ms`, true);
+            if (callback) {
+              callback();
+            }
+          } else {
+            this._benchmark(message, fn, cb);
+          }
+        };
+
+        if (this.state.clearAfterFlag) {
+          this._benchmark(
+            "clear",
+            () => {
+              this.state.messages = [];
+            },
+            finalize,
+            false
+          );
+        } else {
+          finalize();
+        }
+      };
+      this._benchmark(message, fn, cb);
+    } else {
+      this._benchmark(message, fn, callback);
+    }
+  }
+
+  _benchmark(message, fn, cb, log = true) {
+    setTimeout(() => {
+      startMeasure(message);
+      fn();
+      stopMeasure(info => {
+        if (log) {
+          this.log(info.msg);
+        }
+        if (cb) {
+          cb(info);
+        }
+      });
+    }, 10);
+  }
+
+  addMessages(n) {
+    this.benchmark("add " + n, () => {
+      const newMessages = buildData(n);
+      this.state.messages.push.apply(this.state.messages, newMessages);
+    });
+  }
+
+  clear() {
+    this._benchmark("clear", () => {
+      this.state.messages = [];
+    });
+  }
+
+  updateSomeMessages() {
+    this.benchmark("update every 10th", () => {
+      const messages = this.state.messages;
+      for (let i = 0; i < this.state.messages.length; i += 10) {
+        const msg = Object.assign({}, messages[i]);
+        msg.author += "!!!";
+        this.set(messages, i, msg);
+      }
+    });
+  }
+
+  removeMessage(event) {
+    this.benchmark("remove message", () => {
+      const index = this.state.messages.findIndex(m => m.id === event.detail.id);
+      this.state.messages.splice(index, 1);
+    });
+  }
+
+  log(str, isBold) {
+    const div = document.createElement("div");
+    if (isBold) {
+      div.classList.add("bold");
+    }
+    div.textContent = `> ${str}`;
+    this.refs.log.appendChild(div);
+    this.refs.log.scrollTop = this.refs.log.scrollHeight;
+  }
+
+  clearLog() {
+    this.refs.log.innerHTML = "";
+  }
+
+  toggleMultiple() {
+    this.state.multipleFlag = !this.state.multipleFlag;
+  }
+
+  toggleClear() {
+    this.state.clearAfterFlag = !this.state.clearAfterFlag;
+  }
+}
+
+//------------------------------------------------------------------------------
+// Application initialization
+//------------------------------------------------------------------------------
+async function start() {
+  const templates = await owl.utils.loadTemplates("templates.xml");
+  const env = {
+    qweb: new owl.QWeb(templates)
+  };
+  const app = new App(env);
+  app.mount(document.body);
+}
+
+start();

tools/benchmarks/owl-0.13.0/index.html

@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <title>OWL 0.13.0 Benchmark</title>
+  <link href="../shared/main.css" rel="stylesheet"/>
+  <script src='owl.js'></script>
+</head>
+<body>
+  <div id='main'></div>
+  <script src='app.js' type="module"></script>
+</body>
+</html>

tools/benchmarks/owl-0.13.0/templates.xml

@@ -0,0 +1,50 @@
+<templates>
+  <div t-name="App" class="main">
+      <div class="left-thing">
+        <div class="title">Actions</div>
+        <div class="panel">
+          <button t-on-click="addMessages(100)">Add 100 messages</button>
+          <button t-on-click="addMessages(1000)">Add 1k messages</button>
+          <button t-on-click="addMessages(10000)">Add 10k messages</button>
+          <button t-on-click="addMessages(30000)">Add 30k messages</button>
+          <button t-on-click="updateSomeMessages">Update every 10th messages</button>
+          <button t-on-click="clear">Clear</button>
+        </div>
+        <div class="flags">
+            <div>
+                <input type="checkbox" id="multipleflag" t-on-change="toggleMultiple" t-att-checked="state.multipleFlag"/>
+                <label for="multipleflag">Do it 20x</label>
+            </div>
+            <div>
+                <input type="checkbox" id="clearFlag" t-on-change="toggleClear"  t-att-checked="state.clearAfterFlag"/>
+                <label for="clearFlag">Clear after</label>
+            </div>
+        </div>
+        <div class="info">Number of messages: <t t-esc="state.messages.length"/></div>
+        <hr/>
+        <div class="title">Log <span class="clear-log" t-on-click="clearLog">(clear)</span></div>
+        <div class="log">
+            <div class="log-content" t-ref="log"/>
+        </div>
+      </div>
+      <div class="right-thing">
+          <div class="content" t-on-remove-message="removeMessage">
+              <t t-foreach="state.messages" t-as="message">
+                  <t t-widget="Message" t-key="message.id" message="message"/>
+              </t>
+          </div>
+      </div>
+  </div>
+
+  <div t-name="Message" class="message">
+    <span class="author"><t t-esc="props.message.author"/></span>
+    <span class="msg"><t t-esc="props.message.msg"/></span>
+    <button class="remove" t-on-click="removeMessage">Remove</button>
+    <t t-widget="Counter"/>
+  </div>
+
+  <div t-name="Counter">
+    <button t-on-click="increment">Value: <t t-esc="state.counter"/></button>
+  </div>
+
+</templates>

tools/benchmarks/owl-0.14.0/app.js

@@ -0,0 +1,170 @@
+import {
+  buildData,
+  startMeasure,
+  stopMeasure,
+  formatNumber
+} from "../shared/utils.js";
+
+//------------------------------------------------------------------------------
+// Likes Counter Widget
+//------------------------------------------------------------------------------
+class Counter extends owl.Component {
+  state = { counter: 0 };
+
+  increment() {
+    this.state.counter++;
+  }
+}
+
+//------------------------------------------------------------------------------
+// Message Widget
+//------------------------------------------------------------------------------
+class Message extends owl.Component {
+  widgets = { Counter };
+
+  shouldUpdate(nextProps) {
+    return nextProps.message !== this.props.message;
+  }
+  removeMessage() {
+    this.trigger("remove-message", {
+      id: this.props.message.id
+    });
+  }
+}
+
+//------------------------------------------------------------------------------
+// Root Widget
+//------------------------------------------------------------------------------
+class App extends owl.Component {
+  widgets = { Message };
+  state = { messages: [], multipleFlag: false, clearAfterFlag: false };
+
+  mounted() {
+    this.log(
+      `Benchmarking Owl v${owl.__info__.version} (build date: ${
+        owl.__info__.date
+      })`
+    );
+  }
+
+  benchmark(message, fn, callback) {
+    if (this.state.multipleFlag) {
+      const N = 20;
+      let n = N;
+      let total = 0;
+      let cb = info => {
+        let finalize = () => {
+          n--;
+          total += info.delta;
+          if (n === 0) {
+            const avg = total / N;
+            this.log(`Average: ${formatNumber(avg)}ms`, true);
+            if (callback) {
+              callback();
+            }
+          } else {
+            this._benchmark(message, fn, cb);
+          }
+        };
+
+        if (this.state.clearAfterFlag) {
+          this._benchmark(
+            "clear",
+            () => {
+              this.state.messages = [];
+            },
+            finalize,
+            false
+          );
+        } else {
+          finalize();
+        }
+      };
+      this._benchmark(message, fn, cb);
+    } else {
+      this._benchmark(message, fn, callback);
+    }
+  }
+
+  _benchmark(message, fn, cb, log = true) {
+    setTimeout(() => {
+      startMeasure(message);
+      fn();
+      stopMeasure(info => {
+        if (log) {
+          this.log(info.msg);
+        }
+        if (cb) {
+          cb(info);
+        }
+      });
+    }, 10);
+  }
+
+  addMessages(n) {
+    this.benchmark("add " + n, () => {
+      const newMessages = buildData(n);
+      this.state.messages.push.apply(this.state.messages, newMessages);
+    });
+  }
+
+  clear() {
+    this._benchmark("clear", () => {
+      this.state.messages = [];
+    });
+  }
+
+  updateSomeMessages() {
+    this.benchmark("update every 10th", () => {
+      const messages = this.state.messages;
+      for (let i = 0; i < this.state.messages.length; i += 10) {
+        const msg = Object.assign({}, messages[i]);
+        msg.author += "!!!";
+        this.set(messages, i, msg);
+      }
+    });
+  }
+
+  removeMessage(event) {
+    this.benchmark("remove message", () => {
+      const index = this.state.messages.findIndex(m => m.id === event.detail.id);
+      this.state.messages.splice(index, 1);
+    });
+  }
+
+  log(str, isBold) {
+    const div = document.createElement("div");
+    if (isBold) {
+      div.classList.add("bold");
+    }
+    div.textContent = `> ${str}`;
+    this.refs.log.appendChild(div);
+    this.refs.log.scrollTop = this.refs.log.scrollHeight;
+  }
+
+  clearLog() {
+    this.refs.log.innerHTML = "";
+  }
+
+  toggleMultiple() {
+    this.state.multipleFlag = !this.state.multipleFlag;
+  }
+
+  toggleClear() {
+    this.state.clearAfterFlag = !this.state.clearAfterFlag;
+  }
+}
+
+//------------------------------------------------------------------------------
+// Application initialization
+//------------------------------------------------------------------------------
+async function start() {
+  const templates = await owl.utils.loadTemplates("templates.xml");
+  const env = {
+    qweb: new owl.QWeb(templates)
+  };
+  const app = new App(env);
+  app.mount(document.body);
+}
+
+start();

tools/benchmarks/owl-0.14.0/index.html

@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <title>OWL 0.14.0 Benchmark</title>
+  <link href="../shared/main.css" rel="stylesheet"/>
+  <script src='owl.js'></script>
+</head>
+<body>
+  <div id='main'></div>
+  <script src='app.js' type="module"></script>
+</body>
+</html>

tools/benchmarks/owl-0.14.0/templates.xml

@@ -0,0 +1,50 @@
+<templates>
+  <div t-name="App" class="main">
+      <div class="left-thing">
+        <div class="title">Actions</div>
+        <div class="panel">
+          <button t-on-click="addMessages(100)">Add 100 messages</button>
+          <button t-on-click="addMessages(1000)">Add 1k messages</button>
+          <button t-on-click="addMessages(10000)">Add 10k messages</button>
+          <button t-on-click="addMessages(30000)">Add 30k messages</button>
+          <button t-on-click="updateSomeMessages">Update every 10th messages</button>
+          <button t-on-click="clear">Clear</button>
+        </div>
+        <div class="flags">
+            <div>
+                <input type="checkbox" id="multipleflag" t-on-change="toggleMultiple" t-att-checked="state.multipleFlag"/>
+                <label for="multipleflag">Do it 20x</label>
+            </div>
+            <div>
+                <input type="checkbox" id="clearFlag" t-on-change="toggleClear"  t-att-checked="state.clearAfterFlag"/>
+                <label for="clearFlag">Clear after</label>
+            </div>
+        </div>
+        <div class="info">Number of messages: <t t-esc="state.messages.length"/></div>
+        <hr/>
+        <div class="title">Log <span class="clear-log" t-on-click="clearLog">(clear)</span></div>
+        <div class="log">
+            <div class="log-content" t-ref="log"/>
+        </div>
+      </div>
+      <div class="right-thing">
+          <div class="content" t-on-remove-message="removeMessage">
+              <t t-foreach="state.messages" t-as="message">
+                  <t t-widget="Message" t-key="message.id" message="message"/>
+              </t>
+          </div>
+      </div>
+  </div>
+
+  <div t-name="Message" class="message">
+    <span class="author"><t t-esc="props.message.author"/></span>
+    <span class="msg"><t t-esc="props.message.msg"/></span>
+    <button class="remove" t-on-click="removeMessage">Remove</button>
+    <t t-widget="Counter"/>
+  </div>
+
+  <div t-name="Counter">
+    <button t-on-click="increment">Value: <t t-esc="state.counter"/></button>
+  </div>
+
+</templates>

tools/benchmarks/owl-0.7.0/app.js

@@ -0,0 +1,173 @@
+import {
+  buildData,
+  startMeasure,
+  stopMeasure,
+  formatNumber
+} from "../shared/utils.js";
+
+//------------------------------------------------------------------------------
+// Likes Counter Widget
+//------------------------------------------------------------------------------
+class Counter extends owl.Component {
+  state = { counter: 0 };
+  template = "Counter";
+
+  increment() {
+    this.state.counter++;
+  }
+}
+
+//------------------------------------------------------------------------------
+// Message Widget
+//------------------------------------------------------------------------------
+class Message extends owl.Component {
+  widgets = { Counter };
+  template = "Message";
+
+  shouldUpdate(nextProps) {
+    return nextProps !== this.props;
+  }
+  removeMessage() {
+    this.trigger("remove_message", {
+      id: this.props.id
+    });
+  }
+}
+
+//------------------------------------------------------------------------------
+// Root Widget
+//------------------------------------------------------------------------------
+class App extends owl.Component {
+  widgets = { Message };
+  state = { messages: [], multipleFlag: false, clearAfterFlag: false };
+  template = "App";
+
+  mounted() {
+    this.log(
+      `Benchmarking Owl v${owl._version} (build date: ${
+        owl._date
+      })`
+    );
+  }
+
+  benchmark(message, fn, callback) {
+    if (this.state.multipleFlag) {
+      const N = 20;
+      let n = N;
+      let total = 0;
+      let cb = info => {
+        let finalize = () => {
+          n--;
+          total += info.delta;
+          if (n === 0) {
+            const avg = total / N;
+            this.log(`Average: ${formatNumber(avg)}ms`, true);
+            if (callback) {
+              callback();
+            }
+          } else {
+            this._benchmark(message, fn, cb);
+          }
+        };
+
+        if (this.state.clearAfterFlag) {
+          this._benchmark(
+            "clear",
+            () => {
+              this.state.messages = [];
+            },
+            finalize,
+            false
+          );
+        } else {
+          finalize();
+        }
+      };
+      this._benchmark(message, fn, cb);
+    } else {
+      this._benchmark(message, fn, callback);
+    }
+  }
+
+  _benchmark(message, fn, cb, log = true) {
+    setTimeout(() => {
+      startMeasure(message);
+      fn();
+      stopMeasure(info => {
+        if (log) {
+          this.log(info.msg);
+        }
+        if (cb) {
+          cb(info);
+        }
+      });
+    }, 10);
+  }
+
+  addMessages(n) {
+    this.benchmark("add " + n, () => {
+      const newMessages = buildData(n);
+      this.state.messages.push.apply(this.state.messages, newMessages);
+    });
+  }
+
+  clear() {
+    this._benchmark("clear", () => {
+      this.state.messages = [];
+    });
+  }
+
+  updateSomeMessages() {
+    this.benchmark("update every 10th", () => {
+      const messages = this.state.messages;
+      for (let i = 0; i < this.state.messages.length; i += 10) {
+        const msg = Object.assign({}, messages[i]);
+        msg.author += "!!!";
+        this.set(messages, i, msg);
+      }
+    });
+  }
+
+  removeMessage(data) {
+    this.benchmark("remove message", () => {
+      const index = this.state.messages.findIndex(m => m.id === data.id);
+      this.state.messages.splice(index, 1);
+    });
+  }
+
+  log(str, isBold) {
+    const div = document.createElement("div");
+    if (isBold) {
+      div.classList.add("bold");
+    }
+    div.textContent = `> ${str}`;
+    this.refs.log.appendChild(div);
+    this.refs.log.scrollTop = this.refs.log.scrollHeight;
+  }
+
+  clearLog() {
+    this.refs.log.innerHTML = "";
+  }
+
+  toggleMultiple() {
+    this.state.multipleFlag = !this.state.multipleFlag;
+  }
+
+  toggleClear() {
+    this.state.clearAfterFlag = !this.state.clearAfterFlag;
+  }
+}
+
+//------------------------------------------------------------------------------
+// Application initialization
+//------------------------------------------------------------------------------
+async function start() {
+  const templates = await owl.utils.loadTemplates("templates.xml");
+  const env = {
+    qweb: new owl.QWeb(templates)
+  };
+  const app = new App(env);
+  app.mount(document.body);
+}
+
+start();

tools/benchmarks/owl-0.7.0/templates.xml

@@ -0,0 +1,50 @@
+<templates>
+  <div t-name="App" class="main">
+      <div class="left-thing">
+        <div class="title">Actions</div>
+        <div class="panel">
+          <button t-on-click="addMessages(100)">Add 100 messages</button>
+          <button t-on-click="addMessages(1000)">Add 1k messages</button>
+          <button t-on-click="addMessages(10000)">Add 10k messages</button>
+          <button t-on-click="addMessages(30000)">Add 30k messages</button>
+          <button t-on-click="updateSomeMessages">Update every 10th messages</button>
+          <button t-on-click="clear">Clear</button>
+        </div>
+        <div class="flags">
+            <div>
+                <input type="checkbox" id="multipleflag" t-on-change="toggleMultiple" t-att-checked="state.multipleFlag"/>
+                <label for="multipleflag">Do it 20x</label>
+            </div>
+            <div>
+                <input type="checkbox" id="clearFlag" t-on-change="toggleClear"  t-att-checked="state.clearAfterFlag"/>
+                <label for="clearFlag">Clear after</label>
+            </div>
+        </div>
+        <div class="info">Number of messages: <t t-esc="state.messages.length"/></div>
+        <hr/>
+        <div class="title">Log <span class="clear-log" t-on-click="clearLog">(clear)</span></div>
+        <div class="log">
+            <div class="log-content" t-ref="'log'"/>
+        </div>
+      </div>
+      <div class="right-thing">
+          <div class="content" t-on-remove-message="removeMessage">
+              <t t-foreach="state.messages" t-as="message">
+                  <t t-widget="Message" t-key="message.id" t-props="message" t-on-remove_message="removeMessage"/>
+              </t>
+          </div>
+      </div>
+  </div>
+
+  <div t-name="Message" class="message">
+    <span class="author"><t t-esc="props.author"/></span>
+    <span class="msg"><t t-esc="props.msg"/></span>
+    <button class="remove" t-on-click="removeMessage">Remove</button>
+    <t t-widget="Counter"/>
+  </div>
+
+  <div t-name="Counter">
+    <button t-on-click="increment">Value: <t t-esc="state.counter"/></button>
+  </div>
+
+</templates>

tools/benchmarks/owl-0.8.0/app.js

@@ -0,0 +1,173 @@
+import {
+  buildData,
+  startMeasure,
+  stopMeasure,
+  formatNumber
+} from "../shared/utils.js";
+
+//------------------------------------------------------------------------------
+// Likes Counter Widget
+//------------------------------------------------------------------------------
+class Counter extends owl.Component {
+  state = { counter: 0 };
+  template = "Counter";
+
+  increment() {
+    this.state.counter++;
+  }
+}
+
+//------------------------------------------------------------------------------
+// Message Widget
+//------------------------------------------------------------------------------
+class Message extends owl.Component {
+  widgets = { Counter };
+  template = "Message";
+
+  shouldUpdate(nextProps) {
+    return nextProps !== this.props;
+  }
+  removeMessage() {
+    this.trigger("remove_message", {
+      id: this.props.id
+    });
+  }
+}
+
+//------------------------------------------------------------------------------
+// Root Widget
+//------------------------------------------------------------------------------
+class App extends owl.Component {
+  widgets = { Message };
+  state = { messages: [], multipleFlag: false, clearAfterFlag: false };
+  template = "App";
+
+  mounted() {
+    this.log(
+      `Benchmarking Owl v${owl._version} (build date: ${
+        owl._date
+      })`
+    );
+  }
+
+  benchmark(message, fn, callback) {
+    if (this.state.multipleFlag) {
+      const N = 20;
+      let n = N;
+      let total = 0;
+      let cb = info => {
+        let finalize = () => {
+          n--;
+          total += info.delta;
+          if (n === 0) {
+            const avg = total / N;
+            this.log(`Average: ${formatNumber(avg)}ms`, true);
+            if (callback) {
+              callback();
+            }
+          } else {
+            this._benchmark(message, fn, cb);
+          }
+        };
+
+        if (this.state.clearAfterFlag) {
+          this._benchmark(
+            "clear",
+            () => {
+              this.state.messages = [];
+            },
+            finalize,
+            false
+          );
+        } else {
+          finalize();
+        }
+      };
+      this._benchmark(message, fn, cb);
+    } else {
+      this._benchmark(message, fn, callback);
+    }
+  }
+
+  _benchmark(message, fn, cb, log = true) {
+    setTimeout(() => {
+      startMeasure(message);
+      fn();
+      stopMeasure(info => {
+        if (log) {
+          this.log(info.msg);
+        }
+        if (cb) {
+          cb(info);
+        }
+      });
+    }, 10);
+  }
+
+  addMessages(n) {
+    this.benchmark("add " + n, () => {
+      const newMessages = buildData(n);
+      this.state.messages.push.apply(this.state.messages, newMessages);
+    });
+  }
+
+  clear() {
+    this._benchmark("clear", () => {
+      this.state.messages = [];
+    });
+  }
+
+  updateSomeMessages() {
+    this.benchmark("update every 10th", () => {
+      const messages = this.state.messages;
+      for (let i = 0; i < this.state.messages.length; i += 10) {
+        const msg = Object.assign({}, messages[i]);
+        msg.author += "!!!";
+        this.set(messages, i, msg);
+      }
+    });
+  }
+
+  removeMessage(data) {
+    this.benchmark("remove message", () => {
+      const index = this.state.messages.findIndex(m => m.id === data.id);
+      this.state.messages.splice(index, 1);
+    });
+  }
+
+  log(str, isBold) {
+    const div = document.createElement("div");
+    if (isBold) {
+      div.classList.add("bold");
+    }
+    div.textContent = `> ${str}`;
+    this.refs.log.appendChild(div);
+    this.refs.log.scrollTop = this.refs.log.scrollHeight;
+  }
+
+  clearLog() {
+    this.refs.log.innerHTML = "";
+  }
+
+  toggleMultiple() {
+    this.state.multipleFlag = !this.state.multipleFlag;
+  }
+
+  toggleClear() {
+    this.state.clearAfterFlag = !this.state.clearAfterFlag;
+  }
+}
+
+//------------------------------------------------------------------------------
+// Application initialization
+//------------------------------------------------------------------------------
+async function start() {
+  const templates = await owl.utils.loadTemplates("templates.xml");
+  const env = {
+    qweb: new owl.QWeb(templates)
+  };
+  const app = new App(env);
+  app.mount(document.body);
+}
+
+start();

tools/benchmarks/owl-0.8.0/templates.xml

@@ -0,0 +1,50 @@
+<templates>
+  <div t-name="App" class="main">
+      <div class="left-thing">
+        <div class="title">Actions</div>
+        <div class="panel">
+          <button t-on-click="addMessages(100)">Add 100 messages</button>
+          <button t-on-click="addMessages(1000)">Add 1k messages</button>
+          <button t-on-click="addMessages(10000)">Add 10k messages</button>
+          <button t-on-click="addMessages(30000)">Add 30k messages</button>
+          <button t-on-click="updateSomeMessages">Update every 10th messages</button>
+          <button t-on-click="clear">Clear</button>
+        </div>
+        <div class="flags">
+            <div>
+                <input type="checkbox" id="multipleflag" t-on-change="toggleMultiple" t-att-checked="state.multipleFlag"/>
+                <label for="multipleflag">Do it 20x</label>
+            </div>
+            <div>
+                <input type="checkbox" id="clearFlag" t-on-change="toggleClear"  t-att-checked="state.clearAfterFlag"/>
+                <label for="clearFlag">Clear after</label>
+            </div>
+        </div>
+        <div class="info">Number of messages: <t t-esc="state.messages.length"/></div>
+        <hr/>
+        <div class="title">Log <span class="clear-log" t-on-click="clearLog">(clear)</span></div>
+        <div class="log">
+            <div class="log-content" t-ref="'log'"/>
+        </div>
+      </div>
+      <div class="right-thing">
+          <div class="content" t-on-remove-message="removeMessage">
+              <t t-foreach="state.messages" t-as="message">
+                  <t t-widget="Message" t-key="message.id" t-props="message" t-on-remove_message="removeMessage"/>
+              </t>
+          </div>
+      </div>
+  </div>
+
+  <div t-name="Message" class="message">
+    <span class="author"><t t-esc="props.author"/></span>
+    <span class="msg"><t t-esc="props.msg"/></span>
+    <button class="remove" t-on-click="removeMessage">Remove</button>
+    <t t-widget="Counter"/>
+  </div>
+
+  <div t-name="Counter">
+    <button t-on-click="increment">Value: <t t-esc="state.counter"/></button>
+  </div>
+
+</templates>

tools/benchmarks/owl-0.9.0/app.js

@@ -0,0 +1,173 @@
+import {
+  buildData,
+  startMeasure,
+  stopMeasure,
+  formatNumber
+} from "../shared/utils.js";
+
+//------------------------------------------------------------------------------
+// Likes Counter Widget
+//------------------------------------------------------------------------------
+class Counter extends owl.Component {
+  state = { counter: 0 };
+  template = "Counter";
+
+  increment() {
+    this.state.counter++;
+  }
+}
+
+//------------------------------------------------------------------------------
+// Message Widget
+//------------------------------------------------------------------------------
+class Message extends owl.Component {
+  widgets = { Counter };
+  template = "Message";
+
+  shouldUpdate(nextProps) {
+    return nextProps !== this.props;
+  }
+  removeMessage() {
+    this.trigger("remove_message", {
+      id: this.props.id
+    });
+  }
+}
+
+//------------------------------------------------------------------------------
+// Root Widget
+//------------------------------------------------------------------------------
+class App extends owl.Component {
+  widgets = { Message };
+  state = { messages: [], multipleFlag: false, clearAfterFlag: false };
+  template = "App";
+
+  mounted() {
+    this.log(
+      `Benchmarking Owl v${owl._version} (build date: ${
+        owl._date
+      })`
+    );
+  }
+
+  benchmark(message, fn, callback) {
+    if (this.state.multipleFlag) {
+      const N = 20;
+      let n = N;
+      let total = 0;
+      let cb = info => {
+        let finalize = () => {
+          n--;
+          total += info.delta;
+          if (n === 0) {
+            const avg = total / N;
+            this.log(`Average: ${formatNumber(avg)}ms`, true);
+            if (callback) {
+              callback();
+            }
+          } else {
+            this._benchmark(message, fn, cb);
+          }
+        };
+
+        if (this.state.clearAfterFlag) {
+          this._benchmark(
+            "clear",
+            () => {
+              this.state.messages = [];
+            },
+            finalize,
+            false
+          );
+        } else {
+          finalize();
+        }
+      };
+      this._benchmark(message, fn, cb);
+    } else {
+      this._benchmark(message, fn, callback);
+    }
+  }
+
+  _benchmark(message, fn, cb, log = true) {
+    setTimeout(() => {
+      startMeasure(message);
+      fn();
+      stopMeasure(info => {
+        if (log) {
+          this.log(info.msg);
+        }
+        if (cb) {
+          cb(info);
+        }
+      });
+    }, 10);
+  }
+
+  addMessages(n) {
+    this.benchmark("add " + n, () => {
+      const newMessages = buildData(n);
+      this.state.messages.push.apply(this.state.messages, newMessages);
+    });
+  }
+
+  clear() {
+    this._benchmark("clear", () => {
+      this.state.messages = [];
+    });
+  }
+
+  updateSomeMessages() {
+    this.benchmark("update every 10th", () => {
+      const messages = this.state.messages;
+      for (let i = 0; i < this.state.messages.length; i += 10) {
+        const msg = Object.assign({}, messages[i]);
+        msg.author += "!!!";
+        this.set(messages, i, msg);
+      }
+    });
+  }
+
+  removeMessage(data) {
+    this.benchmark("remove message", () => {
+      const index = this.state.messages.findIndex(m => m.id === data.id);
+      this.state.messages.splice(index, 1);
+    });
+  }
+
+  log(str, isBold) {
+    const div = document.createElement("div");
+    if (isBold) {
+      div.classList.add("bold");
+    }
+    div.textContent = `> ${str}`;
+    this.refs.log.appendChild(div);
+    this.refs.log.scrollTop = this.refs.log.scrollHeight;
+  }
+
+  clearLog() {
+    this.refs.log.innerHTML = "";
+  }
+
+  toggleMultiple() {
+    this.state.multipleFlag = !this.state.multipleFlag;
+  }
+
+  toggleClear() {
+    this.state.clearAfterFlag = !this.state.clearAfterFlag;
+  }
+}
+
+//------------------------------------------------------------------------------
+// Application initialization
+//------------------------------------------------------------------------------
+async function start() {
+  const templates = await owl.utils.loadTemplates("templates.xml");
+  const env = {
+    qweb: new owl.QWeb(templates)
+  };
+  const app = new App(env);
+  app.mount(document.body);
+}
+
+start();

tools/benchmarks/owl-0.9.0/templates.xml

@@ -0,0 +1,50 @@
+<templates>
+  <div t-name="App" class="main">
+      <div class="left-thing">
+        <div class="title">Actions</div>
+        <div class="panel">
+          <button t-on-click="addMessages(100)">Add 100 messages</button>
+          <button t-on-click="addMessages(1000)">Add 1k messages</button>
+          <button t-on-click="addMessages(10000)">Add 10k messages</button>
+          <button t-on-click="addMessages(30000)">Add 30k messages</button>
+          <button t-on-click="updateSomeMessages">Update every 10th messages</button>
+          <button t-on-click="clear">Clear</button>
+        </div>
+        <div class="flags">
+            <div>
+                <input type="checkbox" id="multipleflag" t-on-change="toggleMultiple" t-att-checked="state.multipleFlag"/>
+                <label for="multipleflag">Do it 20x</label>
+            </div>
+            <div>
+                <input type="checkbox" id="clearFlag" t-on-change="toggleClear"  t-att-checked="state.clearAfterFlag"/>
+                <label for="clearFlag">Clear after</label>
+            </div>
+        </div>
+        <div class="info">Number of messages: <t t-esc="state.messages.length"/></div>
+        <hr/>
+        <div class="title">Log <span class="clear-log" t-on-click="clearLog">(clear)</span></div>
+        <div class="log">
+            <div class="log-content" t-ref="'log'"/>
+        </div>
+      </div>
+      <div class="right-thing">
+          <div class="content" t-on-remove-message="removeMessage">
+              <t t-foreach="state.messages" t-as="message">
+                  <t t-widget="Message" t-key="message.id" t-props="message" t-on-remove_message="removeMessage"/>
+              </t>
+          </div>
+      </div>
+  </div>
+
+  <div t-name="Message" class="message">
+    <span class="author"><t t-esc="props.author"/></span>
+    <span class="msg"><t t-esc="props.msg"/></span>
+    <button class="remove" t-on-click="removeMessage">Remove</button>
+    <t t-widget="Counter"/>
+  </div>
+
+  <div t-name="Counter">
+    <button t-on-click="increment">Value: <t t-esc="state.counter"/></button>
+  </div>
+
+</templates>

tools/benchmarks/owl-master/app.js

@@ -0,0 +1,165 @@
+import {
+  buildData,
+  startMeasure,
+  stopMeasure,
+  formatNumber
+} from "../shared/utils.js";
+
+//------------------------------------------------------------------------------
+// Likes Counter Widget
+//------------------------------------------------------------------------------
+class Counter extends owl.Component {
+  state = { counter: 0 };
+
+  increment() {
+    this.state.counter++;
+  }
+}
+
+//------------------------------------------------------------------------------
+// Message Widget
+//------------------------------------------------------------------------------
+class Message extends owl.Component {
+  widgets = { Counter };
+
+  shouldUpdate(nextProps) {
+    return nextProps.message !== this.props.message;
+  }
+  removeMessage() {
+    this.trigger("remove-message", {
+      id: this.props.message.id
+    });
+  }
+}
+
+//------------------------------------------------------------------------------
+// Root Widget
+//------------------------------------------------------------------------------
+class App extends owl.Component {
+  widgets = { Message };
+  state = { messages: [], multipleFlag: false, clearAfterFlag: false };
+
+  mounted() {
+    this.log(
+      `Benchmarking Owl v${owl.__info__.version} (build date: ${
+        owl.__info__.date
+      })`
+    );
+  }
+
+  benchmark(message, fn, callback) {
+    if (this.state.multipleFlag) {
+      const N = 20;
+      let n = N;
+      let total = 0;
+      let cb = info => {
+        let finalize = () => {
+          n--;
+          total += info.delta;
+          if (n === 0) {
+            const avg = total / N;
+            this.log(`Average: ${formatNumber(avg)}ms`, true);
+            if (callback) {
+              callback();
+            }
+          } else {
+            this._benchmark(message, fn, cb);
+          }
+        };
+
+        if (this.state.clearAfterFlag) {
+          this._benchmark(
+            "clear",
+            () => {
+              this.state.messages = [];
+            },
+            finalize,
+            false
+          );
+        } else {
+          finalize();
+        }
+      };
+      this._benchmark(message, fn, cb);
+    } else {
+      this._benchmark(message, fn, callback);
+    }
+  }
+
+  _benchmark(message, fn, cb, log = true) {
+    setTimeout(() => {
+      startMeasure(message);
+      fn();
+      stopMeasure(info => {
+        if (log) {
+          this.log(info.msg);
+        }
+        if (cb) {
+          cb(info);
+        }
+      });
+    }, 10);
+  }
+
+  addMessages(n) {
+    this.benchmark("add " + n, () => {
+      const newMessages = buildData(n);
+      this.state.messages.push.apply(this.state.messages, newMessages);
+    });
+  }
+
+  clear() {
+    this._benchmark("clear", () => {
+      this.state.messages = [];
+    });
+  }
+
+  updateSomeMessages() {
+    this.benchmark("update every 10th", () => {
+      const setState = owl.Observer.set;
+      const messages = this.state.messages;
+      for (let i = 0; i < this.state.messages.length; i += 10) {
+        const msg = Object.assign({}, messages[i]);
+        msg.author += "!!!";
+        setState(messages, i, msg);
+      }
+    });
+  }
+
+  removeMessage(event) {
+    this.benchmark("remove message", () => {
+      const index = this.state.messages.findIndex(
+        m => m.id === event.detail.id
+      );
+      this.state.messages.splice(index, 1);
+    });
+  }
+
+  log(str, isBold) {
+    const div = document.createElement("div");
+    if (isBold) {
+      div.classList.add("bold");
+    }
+    div.textContent = `> ${str}`;
+    this.refs.log.appendChild(div);
+    this.refs.log.scrollTop = this.refs.log.scrollHeight;
+  }
+
+  clearLog() {
+    this.refs.log.innerHTML = "";
+  }
+}
+
+//------------------------------------------------------------------------------
+// Application initialization
+//------------------------------------------------------------------------------
+async function start() {
+  const templates = await owl.utils.loadTemplates("templates.xml");
+  const env = {
+    qweb: new owl.QWeb(templates)
+  };
+  const app = new App(env);
+  app.mount(document.body);
+}
+
+start();

tools/benchmarks/owl-master/index.html

@@ -7,7 +7,6 @@
   <script src='../../owl.js'></script>
 </head>
 <body>
-  <div id='main'></div>
   <script src='app.js' type="module"></script>
 </body>
 </html>

tools/benchmarks/owl-master/templates.xml

@@ -0,0 +1,50 @@
+<templates>
+  <div t-name="App" class="main">
+      <div class="left-thing">
+        <div class="title">Actions</div>
+        <div class="panel">
+          <button t-on-click="addMessages(100)">Add 100 messages</button>
+          <button t-on-click="addMessages(1000)">Add 1k messages</button>
+          <button t-on-click="addMessages(10000)">Add 10k messages</button>
+          <button t-on-click="addMessages(30000)">Add 30k messages</button>
+          <button t-on-click="updateSomeMessages">Update every 10th messages</button>
+          <button t-on-click="clear">Clear</button>
+        </div>
+        <div class="flags">
+            <div>
+                <input type="checkbox" id="multipleflag" t-model="multipleFlag"/>
+                <label for="multipleflag">Do it 20x</label>
+            </div>
+            <div>
+                <input type="checkbox" id="clearFlag" t-model="clearAfterFlag" />
+                <label for="clearFlag">Clear after</label>
+            </div>
+        </div>
+        <div class="info">Number of messages: <t t-esc="state.messages.length"/></div>
+        <hr/>
+        <div class="title">Log <span class="clear-log" t-on-click="clearLog">(clear)</span></div>
+        <div class="log">
+            <div class="log-content" t-ref="log"/>
+        </div>
+      </div>
+      <div class="right-thing">
+          <div class="content" t-on-remove-message="removeMessage">
+              <t t-foreach="state.messages" t-as="message">
+                  <t t-widget="Message" t-key="message.id" message="message"/>
+              </t>
+          </div>
+      </div>
+  </div>
+
+  <div t-name="Message" class="message">
+    <span class="author"><t t-esc="props.message.author"/></span>
+    <span class="msg"><t t-esc="props.message.msg"/></span>
+    <button class="remove" t-on-click="removeMessage">Remove</button>
+    <t t-widget="Counter"/>
+  </div>
+
+  <div t-name="Counter">
+    <button t-on-click="increment">Value: <t t-esc="state.counter"/></button>
+  </div>
+
+</templates>

tools/benchmarks/react/app.js

@@ -0,0 +1,346 @@
+import {
+  buildData,
+  startMeasure,
+  stopMeasure,
+  formatNumber
+} from "../shared/utils.js";
+
+//------------------------------------------------------------------------------
+// Counter Widget
+//------------------------------------------------------------------------------
+class Counter extends React.Component {
+  constructor(props) {
+    super(props);
+    this.state = {
+      counter: 0
+    };
+    this.increment = this.increment.bind(this);
+  }
+
+  render() {
+    return React.createElement(
+      "div",
+      null,
+      React.createElement(
+        "button",
+        {
+          onClick: this.increment
+        },
+        "Value: ",
+        this.state.counter
+      )
+    );
+  }
+
+  increment() {
+    this.setState({
+      counter: this.state.counter + 1
+    });
+  }
+}
+//------------------------------------------------------------------------------
+// Message Widget
+//------------------------------------------------------------------------------
+class Message extends React.Component {
+  constructor(props) {
+    super(props);
+    this.removeMessage = this.removeMessage.bind(this);
+  }
+
+  render() {
+    return React.createElement(
+      "div",
+      {
+        className: "message"
+      },
+      React.createElement(
+        "span",
+        {
+          className: "author"
+        },
+        this.props.message.author
+      ),
+      React.createElement(
+        "span",
+        {
+          className: "msg"
+        },
+        this.props.message.msg
+      ),
+      React.createElement(
+        "button",
+        {
+          className: "remove",
+          onClick: this.removeMessage
+        },
+        "Remove"
+      ),
+      React.createElement(Counter, null)
+    );
+  }
+
+  removeMessage() {
+    this.props.removeCB(this.props.message.id);
+  }
+}
+
+//------------------------------------------------------------------------------
+// Root Widget
+//------------------------------------------------------------------------------
+class Main extends React.Component {
+  constructor(props) {
+    super(props);
+    this.state = {
+      messages: [],
+      multipleFlag: false,
+      clearAfterFlag: false
+    };
+    this.removeMessage = this.removeMessage.bind(this);
+    this.toggleMultipleFlag = this.toggleMultipleFlag.bind(this);
+    this.toggleClearAfterFlag = this.toggleClearAfterFlag.bind(this);
+  }
+
+  componentDidMount() {
+    this.log(`Benchmarking React v${React.version}`);
+  }
+  log(str, isBold) {
+    const div = document.createElement("div");
+    if (isBold) {
+      div.classList.add("bold");
+    }
+    div.textContent = `> ${str}`;
+    this.refs.logref.appendChild(div);
+    this.refs.logref.scrollTop = this.refs.logref.scrollHeight;
+  }
+
+  toggleMultipleFlag() {
+    this.setState({ multipleFlag: !this.state.multipleFlag });
+  }
+  toggleClearAfterFlag() {
+    this.setState({ clearAfterFlag: !this.state.clearAfterFlag });
+  }
+
+  render() {
+    const msgList = this.state.messages.map(m =>
+      React.createElement(Message, {
+        key: m.id,
+        message: m,
+        removeCB: this.removeMessage
+      })
+    );
+    return React.createElement(
+      "div",
+      {
+        className: "main"
+      },
+      React.createElement(
+        "div",
+        {
+          className: "left-thing"
+        },
+        React.createElement("div", { className: "title" }, "Actions"),
+        React.createElement(
+          "div",
+          { className: "panel" },
+          React.createElement(
+            "button",
+            {
+              onClick: _ => this.addMessages(100)
+            },
+            "Add 100 messages"
+          ),
+          React.createElement(
+            "button",
+            {
+              onClick: _ => this.addMessages(1000)
+            },
+            "Add 1k messages"
+          ),
+          React.createElement(
+            "button",
+            {
+              onClick: _ => this.addMessages(10000)
+            },
+            "Add 10k messages"
+          ),
+          React.createElement(
+            "button",
+            {
+              onClick: _ => this.addMessages(30000)
+            },
+            "Add 30k messages"
+          ),
+          React.createElement(
+            "button",
+            {
+              onClick: _ => this.updateSomeMessages()
+            },
+            "Update every 10th message"
+          ),
+          React.createElement(
+            "button",
+            {
+              onClick: _ => this.clear()
+            },
+            "Clear"
+          )
+        ),
+        React.createElement(
+          "div",
+          { className: "flags" },
+          React.createElement(
+            "div",
+            null,
+            React.createElement("input", {
+              type: "checkbox",
+              id: "multipleFlag",
+              value: this.state.multipleFlag,
+              onChange: this.toggleMultipleFlag
+            }),
+            React.createElement("label", { for: "multipleFlag" }, " Do it 20x")
+          ),
+          React.createElement(
+            "div",
+            null,
+            React.createElement("input", {
+              type: "checkbox",
+              id: "clearFlag",
+              value: this.state.clearAfterFlag,
+              onChange: this.toggleClearAfterFlag
+            }),
+            React.createElement("label", { for: "clearFlag" }, " Clear after")
+          )
+        ),
+        React.createElement(
+          "div",
+          { className: "info" },
+          "Number of messages: ",
+          this.state.messages.length
+        ),
+        React.createElement("hr"),
+        React.createElement(
+          "div",
+          { className: "title" },
+          "Log ",
+          React.createElement("span", { className: "clear-log" }, "(clear)")
+        ),
+        React.createElement(
+          "div",
+          { className: "log" },
+          React.createElement("div", {
+            className: "log-content",
+            ref: "logref"
+          })
+        )
+      ),
+      React.createElement(
+        "div",
+        {
+          className: "right-thing"
+        },
+        React.createElement(
+          "div",
+          {
+            className: "content"
+          },
+          msgList
+        )
+      )
+    );
+  }
+
+  addMessages(n) {
+    this.benchmark("add " + n, () => {
+      const newMessages = this.state.messages.concat(buildData(n));
+      this.setState({
+        messages: newMessages
+      });
+    });
+  }
+
+  clear() {
+    this._benchmark("clear", () => {
+      this.setState({
+        messages: []
+      });
+    });
+  }
+
+  updateSomeMessages() {
+    this.benchmark("update every 10th", () => {
+      const messages = this.state.messages;
+      for (let i = 0; i < messages.length; i += 10) {
+        messages[i].author += "!!!";
+      }
+      this.forceUpdate();
+    });
+  }
+
+  removeMessage(id) {
+    startMeasure("remove message");
+    const index = this.state.messages.findIndex(m => m.id === id);
+    const messages = this.state.messages.slice();
+    messages.splice(index, 1);
+    this.setState({
+      messages
+    });
+    stopMeasure();
+  }
+
+  benchmark(message, fn, callback) {
+    if (this.state.multipleFlag) {
+      const N = 20;
+      let n = N;
+      let total = 0;
+      let cb = info => {
+        let finalize = () => {
+          n--;
+          total += info.delta;
+          if (n === 0) {
+            const avg = total / N;
+            this.log(`Average: ${formatNumber(avg)}ms`, true);
+            if (callback) {
+              callback();
+            }
+          } else {
+            this._benchmark(message, fn, cb);
+          }
+        };
+        if (this.state.clearAfterFlag) {
+          this._benchmark(
+            "clear",
+            () => {
+              this.setState({ messages: [] });
+            },
+            finalize,
+            false
+          );
+        } else {
+          finalize();
+        }
+      };
+      this._benchmark(message, fn, cb);
+    } else {
+      this._benchmark(message, fn, callback);
+    }
+  }
+
+  _benchmark(message, fn, cb, log = true) {
+    setTimeout(() => {
+      startMeasure(message);
+      fn();
+      stopMeasure(info => {
+        if (log) {
+          this.log(info.msg);
+        }
+        if (cb) {
+          cb(info);
+        }
+      });
+    }, 10);
+  }
+} //-----------------------------
+// INIT
+//-----------------------------
+
+ReactDOM.render(React.createElement(Main, null), document.body);