[REF] initial prototype of owl 2

src/app.ts

@@ -0,0 +1,45 @@
+import { Component } from "./component/component";
+import { ComponentNode } from "./component/component_node";
+import { Scheduler } from "./component/scheduler";
+import { TemplateSet } from "./qweb/template_helpers";
+
+// reimplement dev mode stuff see last change in 0f7a8289a6fb8387c3c1af41c6664b2a8448758f
+
+export class App<T extends typeof Component = any> extends TemplateSet {
+  Root: T;
+  props: any;
+  env: any = {};
+  scheduler = new Scheduler(window.requestAnimationFrame.bind(window));
+  root: ComponentNode | null = null;
+  dev: boolean = true;
+
+  constructor(Root: T, props?: any) {
+    super();
+    this.Root = Root;
+    this.props = props;
+  }
+
+  configure(params: any) {
+    if (params.env) {
+      this.env = params.env;
+    }
+  }
+
+  mount(target: HTMLElement): Promise<InstanceType<T>> {
+    if (!(target instanceof HTMLElement)) {
+      throw new Error("Cannot mount component: the target is not a valid DOM element");
+    }
+    if (!document.body.contains(target)) {
+      throw new Error("Cannot mount a component on a detached dom node");
+    }
+    const node = new ComponentNode(this.Root, this.props, this);
+    this.root = node;
+    return node.mountComponent(target);
+  }
+
+  destroy() {
+    if (this.root) {
+      this.root.destroy();
+    }
+  }
+}