New Twiddle

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

controllers.foo.bar.baz.tom.js

import Ember from 'ember';
import Controller, { inject as controller } from '@ember/controller';

export default Controller.extend({
  theController: controller('foo.bar'),
    
  actions: {
    update() {
      this.get('theController').set('qux', 'def');      
    }
  }
  
});

controllers.foo.bar.js

import Ember from 'ember';

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

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('foo', { path: ':foo_id' }, function() {
    this.route('bar', function() {
      this.route('baz', function() {
        this.route('tom');
        this.route('dick');
        this.route('harry');        
      });
    });
  });
});

export default Router;

routes.foo.js

import Ember from 'ember';

export default Ember.Route.extend({
  model() {
    return new Ember.RSVP.Promise(resolve => {
      setTimeout(resolve, 1000);
    });
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
<hr>

{{outlet}}

<hr>

<br>
<br>

{{link-to 'Tom' 'foo.bar.baz.tom' 1}}
{{link-to 'Dick' 'foo.bar.baz.dick' 1}}
{{link-to 'Harry' 'foo.bar.baz.harry' 1}}

<br>

{{link-to 'Link With Query Params' (query-params qux='abc')}}

templates.foo.bar.baz.dick.hbs

Dick

templates.foo.bar.baz.harry.hbs

Harry

templates.foo.bar.baz.tom.hbs

Tom

<br>

<button {{action "update"}}>Update Params</button>

templates.foo.bar.loading.hbs

Loading

templates.foo.loading.hbs

Loading

twiddle.json

{
  "version": "0.15.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.0.0",
    "ember-template-compiler": "3.0.0",
    "ember-testing": "3.0.0"
  },
  "addons": {
  }
}