[https://developer.mozilla.org/zh-CN/docs/Web/API/MessageEvent](https://link.segmentfault.com/?enc=GQRGKjG5Unsn4pEtD8KvRg%3D%3D.O8LxZY8kJizHholcJcukDKxIh9S7UVaXMRJsHGhslLxrXUq%2Bl3NYkJh5r22dlVPqb68KdhEvu87m5OR4XbyU1w%3D%3D) [https://html.spec.whatwg.org/multipage/comms.html#the-message...](https://link.segmentfault.com/?enc=hSCEKy7TqB%2BbfhpB72Pv0g%3D%3D.sFn%2F07JGOvOYWM4%2Ft0NSMxiaQzJDPLOBax9PHii3xtNsW4XQy36xXdF6BIWt6tr8pV9RZ9dTxSFSAed%2F%2B7HrSOelfvNMn6p74bi8dtnFuNg%3D)