About

Isomorphic channel for Micro Frontends.

Motivation

In large web applications, we often load pages in different execution contexts. To solve historical technical debt problems, sometimes we choose not to be radical, but to choose more rapid integration. So many solutions are emerging in the community, such as what are called Micro Frontends, which are most popular. However, we still believe that the most perfect sandbox isolation scheme in the browser environment is iframe, so we choose to let them coexist with self-built sandboxes, at this time we need a developer-friendly communication solution, this is what isomorphic-channel does.

Feature

• 🤝 Support Cross-Context communications.
• 📢 Support broadcast-mode.
• 🚀 Support handler binding to iframe, No Restrictions(structured clone).

Install

step 1: install

$ npm install @atools/isomorphic-channel

Core Api

setup

If you need broadcast-mode, must call setup first.

import { channel } from '@atools/isomorphic-channel';
channel.setup()

on

Listen from channel, return a cancellation

import { channel } from '@atools/isomorphic-channel';

const remove = channel.on('iframe-broadcast', (payload) => {
  alert(`in qiankun: ${JSON.stringify(payload)}`)

  // remove listener
  remove()
})

⚠️ listen to iframe context

To break the structured clone algorithm limitation, we provide cb.autoRun, you need to use it to wrap your handler.

import { channel, cb } from '@atools/isomorphic-channel';

// The magic of cb.autoRun
// 1. It will break the limitation of [structured clone algorithm].
// 2. Transform handler to current context.
channel.on('qiankun-broadcast', cb.autoRun((payload) => {
  alert(`in iframe: ${JSON.stringify(payload)}`)
}))

broadcast

Broadcast to channel

import { channel } from '@atools/isomorphic-channel';

setTimeout(() => {
  channel.broadcast('qiankun-broadcast', { key: 'hello, I am qianku.' })
}, 5000)

send

Send to channel, without broadcast-mode

import { channel } from '@atools/isomorphic-channel';

channel.send(message, payload);

Enable Debug Mode

import { channel } from '@atools/isomorphic-channel';

channel.debug();

Handshake with iframe

handshake

See https://github.com/dollarshaveclub/postmate

const disconnect = channel.handshake({
  container: DOM_NODE,
  url: IFRAME_URL,
  name: NAME, // required
  classListArray: [], // your own classList
});

// disconnect
disconnect();

Thanks

• postmate - 📭 A powerful, simple, promise-based postMessage library.