New Twiddle

components.flip-animator\.js

import Component from '@glimmer/component';

export default class extends Component {

}

components.render-test.node\.js

import Component from '@glimmer/component';

export default class extends Component {
  init() {
    super.init(...arguments);
    this.children = new Set();
    this.args.parent.registerChild(this);
  }
  
  willDestroy() {
    super.willDestroy(...arguments);
    this.args.parent.unregisterChild(this);
  }
  
  registerChild(node) {
    this.children.add(node);
  }
  
  unregisterChild(node) {
    this.children.delete(node);
  }
  
  didInsertNode(element) {
    console.log('Insert', element);
    this.children.forEach(c => c.didInsertNode(element));
  }

  willDestroyNode(element) {
    console.log('Destroy', element);
    this.children.forEach(c => c.willDestroyNode(element));
  }
}

components.render-test\.js

import NodeComponent from './render-test/node';

export default class extends NodeComponent {}

controllers.application\.js

import Controller from '@ember/controller';

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

templates.application\.hbs

<h1>Welcome to {{this.appName}}</h1>
<br>
<br>
<RenderTest as |node|>
</RenderTest>
<br>
<br>

templates.components.flip-animator\.hbs

{{yield}}

templates.components.render-test.node\.hbs

{{yield (component "render-test/node" parent=this)}}

templates.components.render-test\.hbs

<div ...attributes
  {{did-insert (action this.didInsertNode)}}
  {{will-destroy (action this.willDestroyNode)}}
>
  {{yield (component "render-test/node" parent=this)}}
</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-testing": "3.18.1"
  },
  "addons": {
    "@glimmer/component": "1.0.0",
    "@ember/render-modifier": "1.0.2"
  }
}