Event Complexities

application.controller.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName:'Ember Twiddle'
});

application.template.hbs

<h1>Event Complexities</h1>

{{click-test}}

{{outlet}}
<br>
<br>

click-test.component.js

import Ember from 'ember';
const jQuery = Ember.$;

function makeListener(name, context) {
  return function() {
    console.log('CALLBACK: ' + name);
    context.get('clickStack').push(name);
    return true;
  };
}

export default Ember.Component.extend({
  clickStack: null,
  captureListener: null,
  bubbleListener: null,
  jQueryListener: null,
  captureWindowListener: null,
  bubbleWindowListener: null,
  
  click() {
    console.log('A CLICK');
     this.get('clickStack').push('jquery-on-app (component.click)');
  },
  
  didInsertElement() {
    this.setupListeners();
  },
  
  setupListeners() {
    let element = this.$().find('#layer4').get(0);
    this.captureListener = makeListener('capture-on-layer-4', this);
    this.bubbleListener = makeListener('bubble-on-layer-4', this);
    this.captureWindowListener = makeListener('capture-on-window', this);
    this.bubbleWindowListener = makeListener('bubble-on-window', this);
    this.jQueryListener = makeListener('jquery-on-layer-4', this);
    
    element.addEventListener('click', this.captureListener, true);
    element.addEventListener('click', this.bubbleListener, false);
    document.body.addEventListener('click', this.captureWindowListener, true);
    document.body.addEventListener('click', this.bubbleWindowListener, false);
    jQuery(element).on('click.demo', this.jQueryListener);
  },
  
  willDestroyElement() {
    this.teardownListeners();
  },
  
  teardownListeners() {
    let element = this.$().find('#layer4').get(0);
    element.removeEventListener('click', this.captureListener, true);
    element.removeEventListener('click', this.bubbleListener, false);
    document.body.removeEventListener('click', this.windowCaptureListener, true);
    document.body.removeEventListener('click', this.windowBubbleListener, false);
    jQuery(element).off('click.demo');
  },
  
  actions: {
    triggerClick() {
      this.set('clickStack', []);
      jQuery('#layer4').click();
    },
      
    iWasClicked() {
      this.get('clickStack').pushObject('native onclick');
    },
    
    reset() {
      this.set('clickStack', []);
    }
      
  },
    
  init() {
    this._super();
    this.set('clickStack', []);
  }
  
});

click-test.template.hbs

<button {{action "triggerClick"}}>Trigger Click with jQuery().trigger</button>

<button {{action "reset"}}>Reset</button>
<br>
<hr>
<br>
<div id="layer1" class="layer red">
  Layer 1
  <div id="layer2" class="layer blue">
    Layer 2
    <div id="layer3" class="layer green">
      Layer 3
      <div id="layer4" class="layer white" onclick={{action "iWasClicked"}}>
         Layer 4 (click me)
      </div>
		</div>
  </div>
</div>

<ul>
{{#each clickStack as |click|}}
  <ol>{{click}}</ol>
{{/each}}
</ul>

styles.app.css

body {
  margin: 12px 16px;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 12pt;
}

.layer {
  border: 2px solid;
  padding: 10px;
}

.white {
  background: #fff;
  color: #000;
}

.blue {
  background: #2f44bf;
}

.green {
  background: #2fbf44;
}

.red {
  background: #bf2f44;
}

twiddle.json

{
  "version": "0.4.16",
  "EmberENV": {
    "FEATURES": {}
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.1.0/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.1.0/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.1.0/ember-template-compiler.js"
  }
}