window-message-iframe

components.ui-iframe\.js

import Component from '@ember/component';

export default Component.extend({
  // Properties
  tagName: 'iframe',
  attributeBindings: ['src', 'title'],
  classNames: ['w-full', 'h-screen', 'border-none']
});

components.ui-rci\.js

import Component from '@ember/component';
import { later } from '@ember/runloop';
import { get } from '@ember/object';
import { typeOf } from '@ember/utils';
import { inject as service } from '@ember/service';

export default Component.extend({
  // Services
  windowMessage: service('window-message'),

  // Lifecycle Hooks
  init() {
    this._super(...arguments);

    get(this, 'windowMessage').on('from:clicked-button', function (data) {
      console.log('message received (parent),', data);
      const messageElement = document.querySelector('.message');
      messageElement.innerText = data;
    });
  },

  didInsertElement() {
    this._super(...arguments);

    const { treatments } = this;
    const iframeElement = this.element.querySelector('iframe');
    const frameWindow = iframeElement.contentWindow;

    later(this, () => {
      get(this, 'windowMessage').sendMessage(frameWindow, {
        type: 'show-treatments',
        response: treatments
      }, this.trustedDomain);
    }, 100);
  }
});

controllers.application\.js

import Controller from '@ember/controller';
import { get, set } from "@ember/object"
import { inject as service } from '@ember/service';

export default Controller.extend({
  windowMessage: service(),

  init() {
    this._super(...arguments);

    get(this, 'windowMessage').registerMessageEvent();

    set(this, 'treatments', [{
        name: 'Treatment One',
        code: '123'
      }, {
        name: 'Treatment Two',
        code: '456'
      }, {
        name: 'Treatment Three',
        code: '789'
      }]
    );
  }
});

services.window-message\.js

import Service from '@ember/service';
import { get } from "@ember/object";
import Evented from '@ember/object/evented';
import { typeOf } from '@ember/utils';
import ENV from '../config/environment';

export default Service.extend(Evented, {
  // Properties
  window,

  trustedDomains: ['https://kd183.sse.codesandbox.io'],

  // Lifecycle Hooks
  willDestroy() {
    this._super(...arguments);

    this.deregisterMessageEvent();
  },

  // Methods
  registerMessageEvent() {
    get(this, 'window').addEventListener('message', this.onMessage.bind(this));
  },

  deregisterMessageEvent() {
    get(this, 'window').removeEventListener('message', this.onMessage.bind(this));
  },

  onMessage(evt) {
    const { data, origin } = evt;

    if (!this.isTrustedOrigin(origin)) {
      return;
    }

    const { type, response } = data;

    this.trigger(`from:${type}`, response);
  },

  sendMessage(frameWindow, message, targetOrigin) {
    frameWindow.postMessage(message, "*");
  },

  isTrustedOrigin(origin) {
    return get(this, 'trustedDomains').includes(origin);
  }
});

templates.application\.hbs

<div class="message"></div>

{{#ui-rci
  treatments=treatments
  trustedDomain="https://kd183.sse.codesandbox.io"
  as |rci|
}}
  {{rci.iframe title="rci"}}
{{/ui-rci}}

templates.components.ui-iframe\.hbs

{{yield}}

templates.components.ui-rci\.hbs

{{yield
  (hash
    iframe=(component "ui-iframe" src=trustedDomain title=title)
  )
}}

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": "2.18.2",
    "ember-template-compiler": "2.18.2",
    "ember-testing": "2.18.2"
  },
  "addons": {
    "@glimmer/component": "1.0.0",
    "ember-data": "2.18.5"
  }
}