CPs on nested

components.my-component\.js

import Component from '@ember/component';

export default Component.extend({
  didReceiveAttrs() {
    console.log('called');
  },
})

controllers.application\.js

import Controller from '@ember/controller';

export default Controller.extend({
  appName: 'Ember Twiddle',

  init() {
    this._super(...arguments);
    Ember.set(this, 'foo', {
      some: {
        nested: {
          prop: 'original',
        },
      },
    });
  },
  
  actions: {
    updateFoo() {
      Ember.set(this, 'foo.some.nested.prop', 'updated');
      /*
      Ember.set(this, 'foo', {
        some: {
          nested: {
            prop: 'xx',
          },
        },
      });
      */
    },
  },
});

templates.application\.hbs

<h1>Welcome to {{this.appName}}</h1>
<br>
<br>
<button onclick={{action "updateFoo"}}>Update foo</button>
{{my-component foo=this.foo}}
{{outlet}}
<br>

templates.components.my-component\.hbs

{{this.foo.some.nested.prop}}

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"
  }
}