@Tracked array

controllers.application\.js

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

class WithTrackedValue {
  @tracked
  value = false;
}

export default class ApplicationController extends Controller {
  @tracked array = [];

  constructor() {
    super(...arguments);
    this.array = [new WithTrackedValue(), new WithTrackedValue()];
  }

  get areAllFalse() {
    return !this.array.some(({ value }) => value);
  }

  @action
  toggle(item) {
    item.value = !item.value;
  }

  @action
  remove(index) {
    const newArray = this.array.slice();
    newArray.splice(index, 1);
    this.array = newArray;
  }

  @action
  add() {
    const item = new WithTrackedValue();
    item.value = true;
    
    this.array = [
      ...this.array,
      item,
    ];
  }
}
   

templates.application\.hbs

<h1>All false:  {{this.areAllFalse}}</h1>

<ul>
  {{#each this.array as |item index|}}
    <li>
      Value: {{item.value}}
      
      <button
        {{on "click" (fn this.toggle item)}}
      >
        Toggle
      </button>
      
      <button
        {{on "click" (fn this.remove index)}}
      >
        Remove
      </button>
    </li>
  {{/each}}
</ul>

<button
  {{on "click" this.add}}
>
  Add
</button>

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"
  }
}