New Twiddle

controllers.application.js

import Ember from 'ember';

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

controllers.index.js

import Ember from 'ember';

export default Ember.Controller.extend({
  queryParams: ['color'],
  color: 'blue',
  colors: ['red', 'blue', 'white'],
});

routes.index.js

import Ember from 'ember';

export default Ember.Route.extend({
  canSeeAll: false,
  
  beforeModel(transition) {
    if(!this.get('canSeeAll')) {
      // transition.abort();
      this.transitionTo('index', { queryParams: { color: 'white' }});
    }
  }
});

templates.application.hbs

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

templates.index.hbs

{{link-to 'Home' 'index' (query-params color=null)}}
<br>
Selected Color: {{color}}
<br>
All colors:
<ul>
{{#each colors as |color|}}
<li>{{#link-to 'index' (query-params color=color)}}{{color}}{{/link-to}}</li>
{{/each}}
</ul>

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": "3.2.2",
    "ember-template-compiler": "3.2.2",
    "ember-testing": "3.2.2"
  },
  "addons": {
    "ember-data": "3.2.0"
  }
}