What does application mean

components.animal-list.js

import Ember from 'ember';

export default Ember.Component.extend({
});

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('animals');
});

export default Router;

routes.animals.js

import Ember from 'ember';

export default Ember.Route.extend({
  // Here is the 'activate' method that fires whenever the route 
  // is initialized
  activate: function() {
  	$.notify('From the animals route!');
  }
});

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  // Since this model is returned on the application route,
  // It will be available on EVERY route that you hit.
  
  // If you move this out and put it into the "animals" route
  // then it will only be available on the /animals url
  model: function() {
   return ['Tiger', 'Zebra', 'Dolphin', 'Unicorn'] 
  },
  
  // Here is the 'activate' method that fires whenever the route 
  // is initialized
  activate: function() {
  	$.notify('From the application route');    
  }
});

routes.index.js

import Ember from 'ember';

export default Ember.Route.extend({
  // Here is the 'activate' method that fires whenever the route 
  // is initialized
  activate: function() {
  	$.notify('From the index route!');
  }
});

styles.app.css

@import url(https://fonts.googleapis.com/css?family=Fira+Sans);

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

a {
 	display: inline-block;
  background: white;
  text-decoration: none;
  padding: 5px 10px;
}

.application-template {
	padding: 10px;
 	background: #2A4173; 
 	color: white;
}

.index-template {
	background: #F3E2B4;
  color: #000;
  padding: 10px;
}

.animal-list-component {
 	padding: 10px;
  color: white;
 	background:  #4F7158;
  overflow: auto;
}

.animals-template {
  padding: 10px;
  color: black;
	background: #F3E2B4; 
  
}

.animal-box {
	background: #06405C;
  color: white;
  padding: 10px;
  float: left;
  margin: 10px;
}

templates.animals.hbs

<div class="animals-template">

	<h3>Here are the animals:</h3>
  
  <h4>This is the animals.hbs file that loads with the animals route</h4>
  
  <p>We are no longer on the index route, so nothing from index.hbs lives here...</p>
  
  <p>But everything on application.hbs does since it ecompasses everything at the highest level of the application.</p>
  
  {{animal-list
  	model=model
  }}

</div>

templates.application.hbs

<div class="application-template">

<p>This is the application.hbs template</p>

<p>Anything on the application template will be seen everywhere throughout the app... like the navigation below.</p>
<br>
<br>

{{#link-to 'index'}}Home{{/link-to}}
{{#link-to 'animals'}}Animal List{{/link-to}}

{{outlet}}
<br>
<br>

</div>

templates.components.animal-list.hbs

<div class="animal-list-component">
{{yield}}

<h4>Everything in this box belongs to the animal-list-component</h4>


{{#each model as |animal|}}
	<div class="animal-box">
  	{{animal}}
  </div>
{{/each}}

</div>

templates.index.hbs

<div class="index-template">
  <p>This is the index.hbs file.  It's loaded into the application template with the index route.</p>
</div>

twiddle.json

{
  "version": "0.10.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.6.0",
    "ember-data": "2.6.1",
    "ember-template-compiler": "2.6.0",
    "notify": "https://cdnjs.cloudflare.com/ajax/libs/notify/0.4.2/notify.js"
  },
  "addons": {}
}