在此页

• 句法
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

BroadcastChannel.onmessage event handler is a property that specifies the function to execute when a message event, of type MessageEvent , is received by this BroadcastChannel . Such an event is sent by the browser with a message broadcasted to the channel.

注意： 此特征可用于 Web 工作者 .

句法

channel.onmessage = function;
					

值

• function is the name of a user-defined function, without the () suffix or any parameters, or an anonymous function declaration, such as function(event) {...} . An event handler always has one single parameter, containing the event, here of type MessageEvent .

范例

bc.onmessage = function(ev) { console.log(`message event received! '${ev.data}'`); };
					

规范

规范	状态	注释
HTML 实时标准 The definition of 'BroadcastChannel.onmessage' in that specification.	实时标准	初始定义。

浏览器兼容性

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
onmessage	Chrome 54	Edge ≤79	Firefox 38	IE No	Opera 41	Safari No	WebView Android 54	Chrome Android 54	Firefox Android ?	Opera Android 41	Safari iOS No	Samsung Internet Android 6.0

图例

完整支持

完整支持

不支持

不支持

兼容性未知 ?

兼容性未知

另请参阅

• Another, more heavy weight, way of communicating between browser contexts: ServiceWorker

元数据

• 最后修改： May 7, 2020

相关话题

1. BroadcastChannel
2. 构造函数

   1. BroadcastChannel()
3. 特性

   1. 名称
   2. onmessage
   3. onmessageerror
4. 方法

   1. close()
   2. postMessage()
5. 事件

   1. message
   2. messageerror
6. 继承：

   1. EventTarget