owl/docs/playground/samples/form/form.xml

<templates>
  <div t-name="Form">
    <h1>Form</h1>
    <div>
      Text (immediate): <input t-model="state.text"/>
    </div>
    <div>
      Other text (lazy): <input t-model.lazy="state.othertext"/>
    </div>
    <div>
      Number: <input  t-model.number="state.number"/>
    </div>
    <div>
      Boolean: <input  type="checkbox" t-model="state.bool"/>
    </div>
    <div>
      Color, with a select:
      <select  t-model="state.color">
        <option value="">Select a color</option>
        <option value="red">Red</option>
        <option value="blue">Blue</option>
      </select>
    </div>
    <div>
      Color, with radio buttons:
        <span><input type="radio" name="color" id="red" value="red" t-model="state.color"/><label for="red">Red</label></span>
        <span><input type="radio" name="color" id="blue" value="blue" t-model="state.color"/><label for="blue">Blue</label></span>
    </div>
    <hr/>
    <h1>State</h1>
    <div>Text: <t t-esc="state.text"/></div>
    <div>Other Text: <t t-esc="state.othertext"/></div>
    <div>Number: <t t-esc="state.number"/></div>
    <div>Boolean: <t t-if="state.bool">True</t><t t-else="">False</t></div>
    <div>Color: <t t-esc="state.color"/></div>
  </div>
</templates>