New Twiddle

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('my-route', { path: '/my-route/:id' });
});

export default Router;

routes.my-route.js

import Ember from 'ember';

export default Ember.Route.extend({
  model(params) {
    
    switch(params.id) {
      case "1":
        return "";
        break;
      case "2":
        return "<p>Foo<br />BAR</p>";
        break;
    }
  }
});

templates.application.hbs

{{link-to "1" "my-route" "1"}}
{{link-to "2" "my-route" "2"}}

<div>
{{outlet}}
</div>

templates.my-route.hbs

<h1>head</h1>

{{{model}}}

<div>foot</div>

twiddle.json

{
  "version": "0.11.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "3.4.1",
    "ember-template-compiler": "3.4.1"
  },
  "addons": {}
}