在此页

• 句法
• 范例
• 规范
• 浏览器兼容性
• 相关话题

草案
此页面不完整。

这是 实验性技术
检查 浏览器兼容性表格 要小心谨慎在生产中使用这之前。

CountQueuingStrategy() constructor creates and returns a CountQueuingStrategy 对象实例。

句法

var countQueuingStrategy = new CountQueuingStrategy({highWaterMark});
					

参数

{highWaterMark}

An object containing a highWaterMark property. This is a non-negative integer defining the total number of chunks that can be contained in the internal queue before backpressure is applied.

返回值

An instance of the CountQueuingStrategy 对象。

异常

None.

范例

const queuingStrategy = new CountQueuingStrategy({ highWaterMark: 1 });
const writableStream = new WritableStream({
  // Implement the sink
  write(chunk) {
    ...
  },
  close() {
    ...
  },
  abort(err) {
    console.log("Sink error:", err);
  }
}, queuingStrategy);
var size = queuingStrategy.size();
					

规范

规范	状态	注释
流 The definition of 'CountQueuingStrategy()' 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
CountQueuingStrategy() 构造函数	Chrome 59	Edge 16	Firefox 57 Disabled 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 No	Opera 46	Safari ?	WebView Android 59	Chrome Android 59	Firefox Android 57 Disabled 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 43	Safari iOS ?	Samsung Internet Android 7.0

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

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： Feb 5, 2020

相关话题

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

   1. CountQueuingStrategy()
4. 方法

   1. size()
5. Related pages for Streams

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