template context / actions

components.grand-parent.js

import Ember from 'ember';

export default Ember.Component.extend({
  name: "George",
  
  actions: {
    howdy() {
      alert("howdy from grandparent");
    }
  }
});

components.my-child.js

import Ember from 'ember';

export default Ember.Component.extend({
  
  actions: {
    howdy() {
      alert("howdy from my-child");
    }
  }
});

components.my-parent.js

import Ember from 'ember';

export default Ember.Component.extend({
  name: "Sam",
  
  actions: {
    howdy() {
      alert("howdy from my-parent");
    }
  }
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  actions: {
    howdy() {
      alert("howdy from app");
    }
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}
<br>
<button {{action 'howdy'}}>App Howdy</button>
<br>
{{#grand-parent as |gpName|}}
  <h1>GP: {{gpName}}</h1>
  <button {{action 'howdy'}}>App Howdy</button>
  
  {{#my-parent as |pName|}}
    <h2>P: {{pName}}</h2>
    <button {{action 'howdy'}}>App Howdy</button>

    {{my-child gp=gpName p=pName}}
  {{/my-parent}}
  
  
{{/grand-parent}}

templates.components.grand-parent.hbs

<button {{action 'howdy'}}>GP Howdy</button>
{{yield name}}

templates.components.my-child.hbs

<button {{action 'howdy'}}>Child Howdy</button>

<h3>C: {{gp}}</h3>
<h3>C: {{p}}</h3>

templates.components.my-parent.hbs

<button {{action 'howdy'}}>Parent Howdy</button>
{{yield name}}

twiddle.json

{
  "version": "0.10.6",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.9.0",
    "ember-data": "2.9.0",
    "ember-template-compiler": "2.9.0",
    "ember-testing": "2.9.0"
  },
  "addons": {}
}