so#44759267

controllers.application.js

import Ember from 'ember';

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

controllers.index.js

import Ember from 'ember';

export default Ember.Controller.extend({
  queryParams: ['fin', 'ftw', 'additionalParams'],
  
  actions: {
    updateFin() {
      this.set('fin', `val${Math.random()}`);
    },
    
    updateFtw() {
      this.set('ftw', `val${Math.random()}`);
    },
    
    updateAdditionalParams() {
      let dynamicProperty = `prop${Math.random()}`;
      let val1= `val${Math.random()}`;
      let val2 = Math.random();
      let val3 = new Date();
      let json = {prop2: val2, prop3: val3};
      json[dynamicProperty] = val1;
      this.set('additionalParams', JSON.stringify(json));
    },
    
    clearAll() {
      this.set('fin', undefined);
      this.set('ftw', undefined);
      this.set('additionalParams', undefined);
    },
    
    clearFin() {
      this.set('fin', undefined);
    },
    
    clearFtw() {
      this.set('ftw', undefined);
    },
    
    clearAdditionalParams() {
      this.set('additionalParams', undefined);
    }
  }
});

templates.application.hbs

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

templates.index.hbs

<button onclick={{action 'clearAll'}}>Clear All</button>
<button onclick={{action 'updateFin'}}>Update Fin</button>
<button onclick={{action 'clearFin'}}>Clear Fin</button>
<button onclick={{action 'updateFtw'}}>Update Ftw</button>
<button onclick={{action 'clearFtw'}}>Clear Ftw</button>
<button onclick={{action 'updateAdditionalParams'}}>Update Additional Params (Dynamic Json)</button>
<button onclick={{action 'clearAdditionalParams'}}>Clear Additional Params</button>

twiddle.json

{
  "version": "0.12.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.12.0",
    "ember-template-compiler": "2.12.0",
    "ember-testing": "2.12.0"
  },
  "addons": {
    "ember-data": "2.12.1"
  }
}