Contextual Components

components.child-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  model: null,
  parent: null,
  
  init() {
    this._super(...arguments);
    if (this.get('parent')) {
      this.get('parent').register(this);
    }
  }
});

components.parent-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  children: null,
  
  init() {
    this._super(...arguments);
    this.set('children', []);
  },
  
  registerWithParent(child) {
    Ember.run.later(function() {
      this.get('children').addObject(child);
    }, 1000);
  }
});

controllers.application.js

import Ember from 'ember';

const childObject = Ember.Object.extend({
  name: null
});

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  models: null,
  
  init() {
    this._super(...arguments);
    this.set('models', [
      childObject.create({ name: 'Child 1' }),
      childObject.create({ name: 'Child 2' }),
      childObject.create({ name: 'Child 3' })
    ]);
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
  {{parent-component children=models}}
<br>
<br>

templates.components.child-component.hbs

{{model.name}}

templates.components.parent-component.hbs

<h2>Number of children: {{children.length}}</h2>

{{#each models as |model|}}
  {{child-component model=model parent=this}}
{{/each}}

twiddle.json

{
  "version": "0.10.5",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.8.0",
    "ember-data": "2.8.0",
    "ember-template-compiler": "2.8.0",
    "ember-testing": "2.8.0"
  },
  "addons": {}
}