target-caching-without-bug

components.my-component\.js

import Component from '@glimmer/component';

export default class extends Component {
}

controllers.application\.js

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

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

  constructor(...args) {
    super(...args);
    
    this.updateSomeObject();
  }

	@action
	updateSomeObject() {
    let klass = Ember.Object.extend({
      myGuid: tracked(),
    })
    this.someObject = klass.create({
      actions: { 
        bar() { this.myGuid = guidFor(this); }
      }
    });
  }
}

styles.app\.css

body {
  margin: 12px 16px;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 12pt;
}

.myGuid {
  animation: fadeIn ease 3s;
}

@keyframes fadeIn {
 0% {opacity:0;}
 100% {opacity:1;}
}

templates.application\.hbs

<MyComponent @bar={{action 'bar' target=someObject}}/>
<br>
<br>
Guid For: <span class="myGuid">{{this.someObject.myGuid}}</span>
<br>
<br>
<button {{action 'updateSomeObject'}}>Update the target</button>

templates.components.my-component\.hbs

<button {{on "click" @bar }}>Foo!</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"
  }
}