New Twiddle

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  newProp: 'propX',
  newStr: 'coco',
  toRemoveProp: '',
  hash: {
  	prop1: 'value1'
  },
  actions: {
  	add() {
      this.get('hash')[this.get('newProp')] = this.get('newStr');
      this.notifyPropertyChange('hash');
      console.log('hash', this.get('hash'));
    },
    remove() {
      delete this.get('hash')[this.get('toRemoveProp')];
      this.notifyPropertyChange('hash');
      console.log('hash', this.get('hash'));
    }
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}
<br>
<br>
<p>
hash:
<ul>
{{#each-in hash as |key value|}}
	<li>{{key}} : {{value}}</li>
{{/each-in}}
</ul>
</p>
<div>
<label>prop {{input value=newProp}}</label>
<label>str {{input value=newStr}}</label>
<button {{action 'add'}}>add</button>
</div>
<div>
<label>prop {{input value=toRemoveProp}}</label>
<button {{action 'remove'}}>remove</button>
</div>

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"
  }
}