drag

application.controller.js

import Ember from 'ember';

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

application.template.hbs

<h1>Ember Drag Event Broken?</h1>
<br>
<br>
<h2>
	Ember Drag Event
</h2>
{{em-drag}}

<h2>
JS Drag Event
</h2>

{{js-drag}}

{{outlet}}
<br>
<br>

em-drag.component.js

import Ember from 'ember';

export default Ember.Component.extend({
  classNames: ['em-drag'],
  attributeBindings: ['draggable'],
  draggable: true,
  offset: 0,
  drag(event) {
    var offset = event.originalEvent.clientX;
    
    this.set('offset', offset);
  },
  dragOver(event) {
    event.originalEvent.preventDefault();
    return false;
  },
  drop(event) {
    console.log(event);
    event.originalEvent.preventDefault();
    return false;
  },
});

em-drag.template.hbs

{{offset}}

js-drag.component.js

import Ember from 'ember';

export default Ember.Component.extend({
  classNames: ['js-drag'],
  attributeBindings: ['draggable'],
  draggable: true,
  offset: 0,
  
  //didInitAttrs() {
  // document.addEventListener("drag", this._drag.bind(this), false);
  //  document.addEventListener("dragover", this._over.bind(this), false);
  //  document.addEventListener("drop", this._drop.bind(this), false);
  //},
  _drag(event) {
    this.set('offset', event.clientX);
  },
  _drop(event) {
    event.preventDefault();
  },
  _over(event) {
    event.preventDefault();
  },
  
});

js-drag.template.hbs

{{offset}}

styles.app.css

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

.em-drag {
  width: 30px;
  height: 30px;
  line-height: 30px;
  text-align: center;
  border: 1px solid green;
}

twiddle.json

{
  "version": "0.4.10",
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/1.13.9/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/1.13.11/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/1.13.9/ember-template-compiler.js"
  }
}