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• 句法
• 范例
• 规范
• 浏览器兼容性
• 相关话题

releaseLock() 方法在 ReadableStreamDefaultReader interface releases the reader's lock on the stream.

If the associated stream is errored when the lock is released, the reader will appear errored in that same way subsequently; otherwise, the reader will appear closed.

A reader’s lock cannot be released while it still has a pending read request, i.e., if a promise returned by the reader’s ReadableStreamDefaultReader.read() method has not finished. This will result in a TypeError being thrown.

句法

readableStreamDefaultReader.releaseLock();
					

参数

None.

返回值

undefined .

异常

TypeError

The source object is not a ReadableStreamDefaultReader , or a read request is pending.

范例

function fetchStream() {
  const reader = stream.getReader();
  ...
  reader.releaseLock()
  ...
}
					

规范

规范	状态	注释
流 The definition of 'releaseLock()' 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
releaseLock	Chrome ?	Edge ?	Firefox 65 65 57 Disabled Disabled From version 57: this feature is behind the dom.streams.enabled preference (needs to be set to true ) 和 preference (needs to be set to ). To change preferences in Firefox, visit about:config.	IE ?	Opera ?	Safari ?	WebView Android ?	Chrome Android ?	Firefox Android 65 65 57 Disabled Disabled From version 57: this feature is behind the dom.streams.enabled preference (needs to be set to true ) 和 preference (needs to be set to ). To change preferences in Firefox, visit about:config.	Opera Android ?	Safari iOS ?	Samsung Internet Android ?

图例

完整支持

完整支持

兼容性未知 ?

兼容性未知

实验。期望将来行为有所改变。

实验。期望将来行为有所改变。

用户必须明确启用此特征。

用户必须明确启用此特征。

元数据

• 最后修改： Jan 21, 2020

相关话题

1. Streams API
2. ReadableStreamDefaultReader
3. 构造函数

   1. ReadableStreamDefaultReader()
4. 特性

   1. closed
5. 方法

   1. cancel()
   2. read()
   3. releaseLock()
6. Related pages for Streams

   1. Body.body
   2. ByteLengthQueuingStrategy
   3. CountQueuingStrategy
   4. ReadableByteStreamController
   5. ReadableStream
   6. ReadableStreamBYOBReader
   7. ReadableStreamBYOBRequest
   8. ReadableStreamDefaultController
   9. WindowOrWorkerGlobalScope.fetch()
   10. WritableStream
   11. WritableStreamDefaultController
   12. WritableStreamDefaultWriter