CountQueuingStrategy

Streams APICountQueuingStrategy 接口提供了一个内置的、用于对分块进行计数的队列策略,可以在构造流的时候使用。

构造函数

CountQueuingStrategy()

创建一个新的 CountQueuingStrategy 对象实例。

实例属性

CountQueuingStrategy.highWaterMark 只读

在应用背压之前,内部队列可以包含的分块总数。

实例方法

示例

js
const queueingStrategy = new CountQueuingStrategy({ highWaterMark: 1 });

const writableStream = new WritableStream(
  {
    // Implement the sink
    write(chunk) {
      // …
    },
    close() {
      // …
    },
    abort(err) {
      console.log("Sink error:", err);
    },
  },
  queueingStrategy,
);

const size = queueingStrategy.size();

规范

Specification
Streams
# cqs-class

浏览器兼容性

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Deno
Node.js
CountQueuingStrategy
CountQueuingStrategy() constructor
highWaterMark
size

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Partial support
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参见