Sync and async routing

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('parent', function() {
    this.route('child');
  })
  this.route('async')
});

export default Router;

routes.application.js

import Ember from 'ember';

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

routes.async.js

import Ember from 'ember';

export default Ember.Route.extend({
  model() {
    return {
      msg: new Ember.RSVP.Promise(
  function(resolve, reject) {
    Ember.run.later(function() {
      resolve('Async promise');
    }, 5000);
  }
)
    }
  },
  
  setupController(controller, model) {
    this._super(controller, model)
    controller.set('msg', null)
    model.msg.then(result => {
      controller.set('msg', result)
    })
    
  }
});

routes.sync.js

import Ember from 'ember';

export default Ember.Route.extend({
  model() {
    return new Ember.RSVP.Promise(
      function(resolve) {
      	Ember.run.later(function() {
        	resolve({ msg: 'Sync promise' });
      	}, 5000);
    	}
    )
  }
});

templates.application.hbs

{{#link-to 'sync'}}Sync{{/link-to}}

{{#link-to 'async'}}Async{{/link-to}}

{{outlet}}

templates.async.hbs

<div>Part of the async template</div>
<div>The template as a whole is displayed immediately</div>

{{#if msg}}
	<div>The resolved promise: {{msg}}</div>
{{else}}
	<div>Loading async msg in 5 seconds...</div>
{{/if}}

templates.sync-loading.hbs

<div>This is a loading template for sync transition</div>
<div>The promise will resolve in 5 seconds, completing the transition</div>

templates.sync.hbs

<div>Part of the sync template</div>
<div>The whole template is delayed until the transition completes</div>

<div>The resolved promise: {{model.msg}}</div>

twiddle.json

{
  "version": "0.10.4",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "4.7.0",
    "ember-template-compiler": "4.7.0"
  },
  "addons": {
      "ember-data": "4.7.0"
   }
}