iframe communication helper

host

// Host
import { Host as IframeHost } from 'iframe-helper';

const host = new IframeHost(iframeElement, iframeUrl);
host.addHandler('methodName', async (methodData) => {
  return 'xxx';
});

// call this before load iframe
host.init();

iframe

import { Subpage } from 'iframe-helper';

const helper = new Subpage();
helper.ready.then(() => helper.call('methodName', methodData))
  .then((result) => console.log('result', result))
	.catch(e => console.error(e))