loading state

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'
});

Router.map(function() {
  this.route('next', {path: '/next'});
  this.route('last', {path: '/last'});
});

export default Router;

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  /*model: function () {
    return new Ember.RSVP.Promise(function (res, can) {
      	window.setTimeout(res.bind(null, {}), 1000);
    });
  }
  */
});

routes.last.js

import Ember from 'ember';

export default Ember.Route.extend({
   model: function (params, transition) {
     return new Ember.RSVP.Promise(function (res, can) {
         window.setTimeout(can.bind(null, new Error()), 1000);
     }).catch(function (e) {
       transition.abort();
       throw e;
     });
  }
});

routes.next.js

import Ember from 'ember';

export default Ember.Route.extend({
   model: function (params, transition) {
     return new Ember.RSVP.Promise(function (res, can) {
         window.setTimeout(can.bind(null, new Error()), 1000);
     });
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
{{#link-to 'index'}}home{{/link-to}} {{#link-to "next"}}next{{/link-to}} {{#link-to "last"}}last{{/link-to}}
<br>
<br>
{{outlet}}
<br>
<br>

templates.index.hbs

Home

templates.last-loading.hbs

Loading Last...

templates.last.hbs

last abort

templates.next-loading.hbs

Loading next...

templates.next.hbs

Next

twiddle.json

{
  "version": "0.8.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.5.1",
    "ember-data": "2.5.2",
    "ember-template-compiler": "2.5.1"
  }
}