active links and such

application.controller.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName:'Ember Twiddle',
  groups: [{
    id: 1,
  }, {
    id: 2,
  }, {
    id: 3
  }],
});

application.template.hbs

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

<hr>

{{group-list groups=groups}}

<hr>

{{outlet}}

group-list.component.js

import Ember from 'ember';

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

group-list.template.hbs

{{#each groups as |group|}}
  {{#link-to 'groups.requests' group.id}}
  Group #{{group.id}}
  {{/link-to}}
  <br>
  
{{/each}}

groups.requests.route.js

import Ember from 'ember';

export default Ember.Route.extend({
  model() {
    return new Ember.RSVP.Promise(function(resolve) {
      Ember.run.later(resolve, {}, 2000);
    });
  },
  renderTemplate() {
    this.render('requests');
  },
});

groups.requests.template.hbs

<h2>Requests</h2>

groups.route.js

import Ember from 'ember';

export default Ember.Route.extend({
  model(params) {
    return {
      id: params.id
    }
  },
});

groups.template.hbs

<h1>Home of Group #{{model.id}}</h1>
<hr>
{{outlet}}

loading.template.hbs

Loading...

requests.template.hbs

Top-levelrequests

router.js

import Ember from 'ember';
import config from './config/environment';

const Router = Ember.Router.extend({
  location: config.locationType
});

Router.map(function() {
  this.route('groups', { path: '/groups/:id' }, function() {
    this.route('requests');
  });
});

export default Router;

styles.app.css

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

.active {
  font-weight: bold;
  color: green;
}

twiddle.json

{
  "version": "0.5.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.2.0/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.2.0/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.2.0/ember-template-compiler.js"
  }
}