ReadableStreamDefaultController.desiredSize

在此页

句法
范例
规范
浏览器兼容性
相关话题

desiredSize 只读特性在 ReadableStreamDefaultController interface returns the desired size required to fill the stream's internal queue.

句法

var desiredSize = readableStreamDefaultController.desiredSize;

值

An integer. Note that this can be negative if the queue is over-full.

范例

A readable stream with an underlying push source and backpressure support example in the spec provides a good example of using desiredSize to manually detect when the stream is full and apply backpressure, and also of using ReadablestreamDefaultController.error() to manually trigger a stream error if another part of the system it relies on fails.

规范

规范	状态	注释
流 The definition of 'desiredSize' in that specification.	实时标准	初始定义。

浏览器兼容性

The compatibility table in 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
`desiredSize`	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
兼容性未知 ?
实验。期望将来行为有所改变。
用户必须明确启用此特征。

元数据

最后修改： Jan 27, 2020

在此页

句法

值

范例

规范

浏览器兼容性

图例

相关话题