MessageEvent.source

在此页

source 只读特性在 MessageEvent 接口是 MessageEventSource (which can be a WindowProxy , MessagePort ，或 ServiceWorker object) representing the message emitter.

let mySource = messageEvent.source;

a MessageEventSource (which can be a WindowProxy , MessagePort ，或 ServiceWorker object) representing the message emitter.

myWorker.onmessage = function(e) {
  result.textContent = e.data;
  console.log('Message received from worker');
  console.log(e.source);
};

规范	状态	注释
HTML 实时标准 The definition of ' MessageEvent: source' in that specification.	实时标准

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`source`	Chrome Yes	Edge 12	Firefox 55	IE No	Opera Yes	Safari Yes	WebView Android Yes	Chrome Android Yes	Firefox Android 55	Opera Android Yes	Safari iOS Yes	Samsung Internet Android Yes
返回 `MessageEventSource`	Chrome Yes	Edge ≤79	Firefox 55	IE No	Opera ?	Safari ?	WebView Android Yes	Chrome Android Yes	Firefox Android 55	Opera Android ?	Safari iOS ?	Samsung Internet Android Yes

ExtendableMessageEvent — similar to this interface but used in interfaces that needs to give more flexibility to authors.