octane object tracking

controllers.application\.js

import Controller from '@ember/controller';
import { action } from '@ember/object';
import {
  tracked
} from 'tracked-built-ins';

export default class ApplicationController extends Controller {
  appName = 'Ember Twiddle';
	
	address = tracked({ city: 'Chennai' });
  people = tracked({ name: 'Gokul', address: this.address});

	@action
  changeCity() {
 		this.people.address.city = 'Salem'
  }
}

templates.application\.hbs

<h1>Welcome to {{this.appName}}</h1>
{{this.people.name}}, 
{{this.people.address.city}}
<br><br>
<button {{on "click" this.changeCity}}> Change City </button>
<br>
{{outlet}}
<br>
<br>

twiddle\.json

{
  "version": "0.17.1",
  "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/3.5.1/jquery.js",
    "ember": "3.18.1",
    "ember-template-compiler": "3.18.1",
    "ember-testing": "3.18.1"
  },
  "addons": {
    "@glimmer/component": "1.0.0",
    "tracked-built-ins": "1.0.2"
  }
}