skeleton-loading

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  queryParams: ['appName'],
  appName: 'Anmals'
});

routes.application.js

import Ember from 'ember';
const { 
  run: { later }, 
  RSVP: { Promise } 
} = Ember;

export default Ember.Route.extend({
  queryParams: {
  	appName: { refreshModel: true }
  },
  model() {
  	return new Promise((resolve, reject) => {
    	later(null, resolve, 7000);
    }); 
  }
});

styles.app.css

body {
  margin: 12px 16px;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 12pt;
}
img{
 margin-right:10px; 
}

.app-name{
 //border:1px solid black;
  background-color:#E7E4E4;
  width:30%;
  height:20px;
}

.category{
 display:flex;
}
.image {
   //border:1px solid black;
  background-color:#E7E4E4;
  width:30px;
  height:30px;
  margin-right:10px;
}
.category-name{
 //border:1px solid black;
  background-color:#E7E4E4;
  width:20%;
  height:15px;
}

.item{
 //border:1px solid black;
  background-color:#E7E4E4;
  width:10%;
  height:10px;
  margin:3px;
}

templates.application-loading.hbs

<h3 class="app-name"></h3>
<h4 class="category"><div class="image"></div><div class="category-name"></div></h4>
<ul>
  <li class="item"></li>
  <li class="item"></li>
  <li class="item"></li>
  <li class="item"></li>
</ul>
<br>
<h4 class="category"><div class="image"></div><div class="category-name"></div></h4>
<ul>
  <li class="item"></li>
</ul>

templates.application.hbs

<h3>{{appName}}, welcome to my app!</h3>

<h4><img src="smiley.gif" height="30" width="30">Vertebrates</h4>
<ul>
  <li>Mammals</li>
  <li>Birds</li>
  <li>Fish</li>
  <li>Reptiles</li>
</ul>

<h4><img src="smiley.gif" height="30" width="30">Invertebrates</h4>
<ul>
  <li>Insects</li>
</ul>

<br>
{{outlet}}
<br>
<br>



Change app name:
<input type="text" value={{appName}} oninput={{action (mut appName) value="target.value"}}>

twiddle.json

{
  "version": "0.13.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.16.2",
    "ember-template-compiler": "2.16.2",
    "ember-testing": "2.16.2"
  },
  "addons": {
    "ember-data": "2.16.3"
  }
}