BroadcastChannel.close()

通过调用 BroadcastChannel.close() 方法，可以马上断开其与对应频道的关联，并让其被垃圾回收。这是必要的步骤，因为浏览器没有其它方式知道频道不再被需要。

Note: 此特性在 Web Worker 中可用。

语法

var str = channel.close();

// 连接到指定频道
var bc = new BroadcastChannel('test_channel');

// 其它操作 (如: postMessage, …)

// 当完成后，断开与频道的连接
bc.close();

规范	状态	备注
HTML Living Standard BroadcastChannel.close()	Living Standard	Initial definition.

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`close`	Chrome Full support 54	Edge Full support ≤79	Firefox Full support 38	IE No support No	Opera Full support 41	Safari No support No	WebView Android Full support 54	Chrome Android Full support 54	Firefox Android ?	Opera Android Full support 41	Safari iOS No support No	Samsung Internet Android Full support 6.0