CountQueuingStrategy()
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since 2019年1月.
CountQueuingStrategy() 构造函数创建并返回一个 CountQueuingStrategy 对象实例。
语法
js
new CountQueuingStrategy(highWaterMark)
参数
highWaterMark-
一个包含
highWaterMark属性的对象。这个属性是一个非负整数，定义了在应用背压之前内部队列包含的分块的总数。
返回值
一个 CountQueuingStrategy 对象实例。
异常
无。
示例
js
const queuingStrategy = new CountQueuingStrategy({ highWaterMark: 1 });
const writableStream = new WritableStream(
{
// Implement the sink
write(chunk) {
// …
},
close() {
// …
},
abort(err) {
console.log("Sink error:", err);
},
},
queuingStrategy,
);
const size = queuingStrategy.size();
规范
| Specification |
|---|
| Streams # ref-for-cqs-constructor① |