New Twiddle

components.my-link-to.js

import Ember from 'ember';

export default LinkComponent.extend({    
});

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'
});

Router.map(function() {
    this.route('item', { path: '/item/:item_id' });
});

export default Router;

routes.item.js

import Ember from 'ember';

export default Ember.Route.extend({
  model: function(params) {
      return params.item_id;  
  }
});

styles.app.css

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

.active {
  background: blue;
  color: #fff;
}

templates.application.hbs

<h2>Hello</h2>
    
    <ul>
      <li>{{#my-link-to "index"}}Index{{/my-link-to}}</li>
      <li>
        All items
        <ul>
          <li>{{#link-to "item" 1}}Item 1{{/link-to}}</li>
          <li>{{#link-to "item" 2}}Item 2{{/link-to}}</li>
          <li>{{#link-to "item" 3}}Item 3{{/link-to}}</li>
          <li>{{#link-to "item" 4}}Item 4{{/link-to}}</li>
          <li>{{#link-to "item" 5}}Item 5{{/link-to}}</li>
        </ul>
      </li>
      <li>
        Group A
        <ul>
          <li>{{#link-to "item" 1}}Item 1{{/link-to}}</li>
          <li>{{#link-to "item" 2}}Item 2{{/link-to}}</li>
          <li>{{#link-to "item" 3}}Item 3{{/link-to}}</li>
        </ul>
      </li>
      <li>
        Group B
        <ul>
          <li>{{#link-to "item" 4}}Item 4{{/link-to}}</li>
          <li>{{#link-to "item" 5}}Item 5{{/link-to}}</li>
        </ul>
      </li>
    </ul>
    <hr />

    {{outlet}}

templates.components.my-link-to.hbs

{{yield}}

templates.index.hbs

I am index.

templates.item.hbs

I am item {{model}}.

twiddle.json

{
  "version": "0.7.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "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/2.4.3/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.4.3/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.4.3/ember-template-compiler.js"
  }
}