New Twiddle

controllers.application\.js

import Controller from '@ember/controller';
import { tracked } from '@glimmer/tracking';
import { action } from '@ember/object';


export default class ApplicationController extends Controller {
  appName = 'Ember Twiddle';

	@tracked list = [
    { 
      id: 1, 
      name: "Luis", 
      img: "https://api.adorable.io/avatars/25/luis"
    },     { 
      id: 1, 
      name: "Jaden", 
      img: "https://api.adorable.io/avatars/25/jaden"
    },     { 
      id: 1, 
      name: "Gustavo", 
      img: "https://api.adorable.io/avatars/25/gustavo"
    }, 
  ];

	@action
	cloneList() {
    console.log(this.list === [...this.list]);
    this.list === []
  };
}

templates.application\.hbs

<h1>Welcome to {{this.appName}}</h1>
<br>
<br>
	<ul>
	{{#each this.list as |person|}}
  	<li>
    	<img src={{person.img}} /> {{person.name}}
 		</li>
  {{/each}}
  </ul>
<br>
<br>

<button {{on "click" this.cloneList}}>clone list</button>

twiddle\.json

{
  "version": "0.17.0",
  "EmberENV": {
    "FEATURES": {},
    "_TEMPLATE_ONLY_GLIMMER_COMPONENTS": false,
    "_APPLICATION_TEMPLATE_WRAPPER": true,
    "_JQUERY_INTEGRATION": true
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.17.0",
    "ember-template-compiler": "3.17.0",
    "ember-testing": "3.17.0"
  },
  "addons": {
    "@glimmer/component": "1.0.0"
  }
}