ByteLengthQueuingStrategy.size()

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since January 2019.

ByteLengthQueuingStrategy 接口的 size() 方法返回给定分块的 byteLength 属性。

语法

js
size(chunk)

参数

chunk

一个通过流传递的数据分块。

返回值

一个整数，表示给定分块的字节长度。

示例

js
const queuingStrategy = new ByteLengthQueuingStrategy({ highWaterMark: 1 });

const readableStream = new ReadableStream(
  {
    start(controller) {
      // …
    },
    pull(controller) {
      // …
    },
    cancel(err) {
      console.log("stream error:", err);
    },
  },
  queuingStrategy,
);

const size = queueingStrategy.size(chunk);

规范

Specification
Streams
# blqs-size

浏览器兼容性

参见