Component 2-way

components.mut-test.js

import Ember from 'ember';

export default Ember.Component.extend({
  actions: {
    update() {
      this.set('value', 'World');
    }
  }
});

components.parent-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  bound: 'Hello'
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',

});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}

{{#parent-component as |value|}}
  parent: {{value}}
{{/parent-component}}
<br>
<br>

templates.components.mut-test.hbs

<button {{action "update"}}>{{value}}</button>

templates.components.parent-component.hbs

{{yield bound}}

{{mut-test value=bound}}

twiddle.json

{
  "version": "0.11.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "release",
    "ember-data": "2.11.0",
    "ember-template-compiler": "release",
    "ember-testing": "release"
  },
  "addons": {}
}