async-stuff-to-do

components.my-component\.hbs

<p>{{this.counter}}</p>
<button {{on "click" this.doStuff}}>click me</button>

components.my-component\.js

import Component from '@glimmer/component';
import { action } from '@ember/object';
import { tracked } from '@glimmer/tracking';

export default class extends Component {
  @tracked counter = 0;

  @action doStuff() {
    setInterval(() => {
      this.counter = this.counter + 1;
      console.log("isDestroyed", this.isDestroyed);
      console.log("counter", this.counter);
    }, 1000);
  }
}

components.time-bomb\.js

import Component from '@glimmer/component';
import { tracked } from '@glimmer/tracking';
import { action } from '@ember/object';

export default class TimeBomb extends Component {
  @tracked timer = 5;
  @tracked kaboom = false;

  constructor() {
    super(...arguments);
    
    let timerId = setInterval(() => {
      this.timer = this.timer - 1;
      console.log(this.timer);
      
      if (this.isDestroyed) {
        clearInterval(timerId);
        return;
      }
      
      if (this.timer === 0) {
        clearInterval(timerId);
        this.kaboom = true;
        
	      console.log("KABOOM 💣💥");
        return;
      }
    }, 1000);
  }
}

controllers.application\.js

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

import { inject as service } from '@ember/service';

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

	@service modals;

	@tracked showComponent = true;
	@action toggleStuff() {
    this.showComponent = !this.showComponent;
  }

  @action async openTimeBomb() {
    console.log('boom')
    
    await this.modals.open('time-bomb');
    
    console.log('saved!')
  }
}

templates.application\.hbs

<div>
	{{#if this.showComponent }}
  	<MyComponent />
  
    <button {{on "click" this.toggleStuff}}>
      {{if this.showComponent "I don't need this component anymore" "wtf put it back"}}
    </button>
{{/if}}
</div>

<div>
  <button type="button" {{on "click" this.openTimeBomb}}>
    Open a modal
  </button>
</div>

<EpmModalContainer />

templates.components.time-bomb\.hbs

<div>
	{{#if this.kaboom}}
  	KABOOM 💣💥
  {{else}}
  	Timer: {{this.timer}}
    <div>
      <button type="button" {{on "click" @close}}>
        close
      </button>
    </div>
  {{/if}}


</div>

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-promise-modals": "2.0.0",
    "ember-testing": "3.18.1"
  },
  "addons": {
    "@glimmer/component": "1.0.0",
    "ember-promise-modals": "2.0.0"
  }
}