New Twiddle

application.controller.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  queryParams: {
    navigationFilter: 'navigation_filter'
  },
  
  navigationFilter: null
});

application.template.hbs

{{link-to 'with nothing' (query-params navigationFilter=null)}}<br>
{{link-to 'with a=1' (query-params navigationFilter='{"a":1}')}}<br>
{{link-to 'with a=1, b=2' (query-params navigationFilter='{"a":1,"b":2}')}}

twiddle.json

{
  "version": "0.6.4",
  "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/2.4.1/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.4.0/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.4.1/ember-template-compiler.js"
  }
}