Activating More than one Route

controllers.application.js

import Ember from 'ember';

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

router.js

import Ember from 'ember';
import config from './config/environment';

const Router = Ember.Router.extend({
  location: 'none',
  rootURL: config.rootURL
});

Router.map(function() {
  this.route("share-dialog");
  this.route("left-pane");
});

export default Router;

routes.left-pane.js

import Ember from 'ember';

export default Ember.Route.extend({
  renderTemplate: function(){
    this.render('left-pane', { outlet: 'left-panel' });
  }
});

routes.share-dialog.js

import Ember from 'ember';

export default Ember.Route.extend({
  renderTemplate: function(){
    this.render('left-pane', { outlet: 'left-panel' });
    this.render('share-dialog');
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{#link-to "left-pane"}}Left Pane{{/link-to}}
{{#link-to "share-dialog"}}Share{{/link-to}}
<div style="background-color:#eaeaea;width:200px;height:400px;border:1px solid black;float:left;">
{{outlet "left-panel"}}
</div>
<div style="background-color:#aaa;width:390px;height:400px;border:1px solid black;float:right;"></div>
<br>
<br>
{{outlet}}

templates.left-pane.hbs

<p>Left Pane Contents</p>

templates.share-dialog.hbs

<h2>Share Dialog Contents</h2>

twiddle.json

{
  "version": "0.10.7",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.10.0",
    "ember-data": "2.10.0",
    "ember-template-compiler": "2.10.0",
    "ember-testing": "2.10.0"
  },
  "addons": {}
}