Actions And Glimmer Components

components.location-picker\.js

import GlimmerComponent from '@glimmer/component';
import { tracked } from '@glimmer/tracking';
import EmberComponent from '@ember/component';
import { action } from '@ember/object';
import { guidFor } from '@ember/object/internals';
import { addObserver } from '@ember/object/observers';

function myAction(_target, _name, descriptor) {
  const original = descriptor.value;

  const cache = {};

  return {
    get() {
      const id = guidFor(this);
      const context = this;

      if (id in cache) {
        return cache[id];
      }

      const value = function() {
        return original.apply(context, arguments);
      };

      cache[id] = value;

      window.context = context;
			
      console.log(context);
      // context.addObserver('willDestroyElement', function() {
      //   console.log("DESTROYING ELEMENT");
      //   delete cache[id];
      // });

      return value;
    }
  }
}

export default class extends GlimmerComponent {
	@tracked isOpen

  @myAction
  toggleOpen() {
    console.log(`wasOpen == ${this.isOpen}`);
    this.isOpen = !this.isOpen;
    console.log(`isOpen == ${this.isOpen}`);
  }
}

controllers.application\.js

import Controller from '@ember/controller';

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

templates.application\.hbs

<h1>Demonstraction of action decorator</h1>
<br>
<br>
  <LocationPicker />
<br>
<br>

templates.components.location-picker\.hbs

<div>
  Modal is "{{if this.isOpen 'open' 'closed'}}"
  <br><br>
  <button {{on 'click' this.toggleOpen}}>
    Click here to {{if this.isOpen 'close' 'open'}}
  </button>
</div>

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"
  }
}