const Bridge = require('async-bridge');

const bridge = Bridge.create();

// Bind incoming event data to the bridge.
addEventListener('message', event => bridge.receiver(event.data));

// Set an emitter for outgoing data.
bridge.emitter = data => window.parent.postMessage(data, '*');

// Register a response for a named request.
bridge.respond('getRandomNumber', () => Math.random());

// Send a request with a timeout of 1s.
bridge.request('hello?', { data: '123' }, 1000).then(response => {}).catch(error => {});

// Make sure the briges are in sync on an interval.
setInterval(bridge.sync, 2000)