New Twiddle

controllers.application.js

import Ember from 'ember';

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

router.js

import EmberRouter from '@ember/routing/router';
import config from './config/environment';

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

Router.map(function() {
  this.route('my-first');
  this.route('my-second');
  this.route('top', function() {
  
  })
});

export default Router;

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
   actions: {
    transitionTo(routeName) {
      this.transitionTo(routeName);
    },
    
    intermediateTransitionTo(routeName) {
      this.intermediateTransitionTo(routeName);
    }
  }
  
});

routes.my-first.js

import Ember from 'ember';

export default Ember.Route.extend({
  model() {
    return new Promise(resolve => setTimeout(() => resolve(), 500)); 
  }
});

routes.my-second.js

import Ember from 'ember';

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

templates.application-loading.hbs

<div style="background-color: steelBlue; padding: 10px;">
	<h2>I'm loading lol</h2>
</div>

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<h2>Param is {{param}}</h2>
<br>
<br>
{{link-to 'my-first' 'my-first'}}
{{link-to 'my-second' 'my-second'}}
<br>
<br>
<h3>transition to</h3>
<button {{action 'transitionTo' 'my-first'}}>my-first</button>
<button {{action 'transitionTo' 'my-second'}}>my-second</button>
<br>
<br>
<h3>intermediate transition to</h3>
<button {{action 'intermediateTransitionTo' 'my-first'}}>my-first</button>
<button {{action 'intermediateTransitionTo' 'my-second'}}>my-second</button>
<br>
<br>

{{outlet}}
<br>
<br>

templates.my-first.hbs

<h2>my first</h2>

templates.my-second.hbs

<h2>my second</h2>

twiddle.json

{
  "version": "0.14.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "2.18.2",
    "ember-template-compiler": "2.18.2",
    "ember-testing": "2.18.2"
  },
  "addons": {
    "ember-data": "2.18.2"
  }
}