Passing Actions Upward

components.the-bottom.js

import Ember from 'ember';

export default Ember.Component.extend({
  actions: {
    foo: function(...args) {
      console.log('Hit foo in bottom');
      this.sendAction('foo', ...args);
    }
  }
});

components.the-top.js

import Ember from 'ember';

export default Ember.Component.extend({
  // I don't want to have to know what to pass up to the controller.
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Components are Crazy',
  
  actions: {
    foo: function(data) {
      alert('It worked!', data);
    }
  }
});

templates.application.hbs

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

{{the-top}}

templates.components.the-bottom.hbs

<button {{action "foo" "bar"}}>Click Me!</button>

templates.components.the-top.hbs

{{the-bottom foo="foo"}}

twiddle.json

{
  "version": "0.10.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.6.0",
    "ember-data": "2.6.1",
    "ember-template-compiler": "2.6.0"
  },
  "addons": {}
}