Drag demo

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
	classNames: ['draggable'],
	attributeBindings: ['draggable'],
	draggable: true,
	didInsertElement() {
		this._super(...arguments);
    document.addEventListener('mouseover', (event) => {
				console.log(event);
				if (this.isElementBeingDragged) {
					event = event.originalEvent || event;
          let { x: top, y: left } = event;
          console.log(top, left);
          this.$().css({
            top,
            right: 'initial',
            left,
            right: 'initial',
						'user-select': 'initial'
          });
					this.isElementBeingDragged = false;
        }
    });
  },

	
	mouseDown(event) {
		//this._super(...arguments);
		this.isElementBeingDragged = true;
		this.$().css('user-select', 'none');
  },

});

controllers.application.js

import Ember from 'ember';

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

styles.app.css

body {
  margin: 12px 16px;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 14px;
}

.container {
	position: absolute;
	top: 70px;
	bottom: 0;
	left: 0;
	right: 0;
  width: 100%;
	border: 1px solid
}

.draggable {
	position: fixed;
	top: 0px;
	left: 0px;
	width: 60px;
	height: 60px;
	border: 1px solid red;
}

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
<div class="container">
	{{my-component}}
</div>
{{outlet}}
<br>
<br>

templates.components.my-component.hbs

drag me
{{yield}}

twiddle.json

{
  "version": "0.12.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.12.0",
    "ember-template-compiler": "2.12.0",
    "ember-testing": "2.12.0"
  },
  "addons": {
    "ember-data": "2.12.1"
  }
}