broadcastchannel-polyfill

Polyfill for BroadcastChannel for Safari, old Chrome and Opera

https://cdnjs.webstatic.cn/ajax/libs/broadcastchannel-polyfill/1.0.1/index.js
https://cdnjs.webstatic.cn/ajax/libs/broadcastchannel-polyfill/1.0.1/index.min.js