link-to bug

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  routes: [
    '0',
    '1',
    '2',
    '3',
    '4',
    '5',
    '6',
    '7',
    '8',
    '9'
  ],
});

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('thread', { path: '/:id' });
});

export default Router;

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  
  actions: {
    willTransition(transition) {
      this._super(...arguments);

      // If the user wants to transition, reset and return
      if (this.continueTransition) {
        // reset users selection
        this.continueTransition = false;
        return false; 
      }
      
      transition.abort();

      var previousTransition = this.getWithDefault('previousTransition', transition);
      this.set('previousTransition', previousTransition);
      
      var transitionToNewRoute = confirm("Are you sure you want to navigate to a new route?");
      if (transitionToNewRoute) {
        this.continueTransition = true;
        previousTransition.retry();
      }
    }
  }
});

styles.app.css

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

.active {
  background: red;
}

ul span {
  display: none;
}

.active span {
  display: inline;
}

ul {
  list-style: none;
}

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
<ul>
  {{#each routes as |id|}}
    <li>
      {{#link-to 
        "thread"
        id
        data-control-name="view_message"
        class="msg-conversation-listitem__link msg-conversations-container__convo-item-link"}}
        Route {{id}}
        <span>I am active</span>
     {{/link-to}}
    </li>
  {{/each}}
</ul>
{{outlet}}
<br>
<br>

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": "2.10.2",
    "ember-data": "2.11.0",
    "ember-template-compiler": "2.10.2",
    "ember-testing": "2.10.2"
  },
  "addons": {}
}