CountQueuingStrategy: highWaterMark property
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.
Note: This feature is available in Web Workers.
The read-only CountQueuingStrategy.highWaterMark property returns the total number of chunks that can be contained in the internal queue before backpressure is applied.
Values
An integer representing a number of chunks.
Examples
js
const queueingStrategy = new CountQueuingStrategy({ highWaterMark: 1 });
const readableStream = new ReadableStream(
{
start(controller) {
// ...
},
pull(controller) {
// ...
},
cancel(err) {
console.log("stream error:", err);
},
},
queuingStrategy,
);
const size = queuingStrategy.size(chunk);
console.log(`highWaterMark value: ${queuingStrategy.highWaterMark}$`);
Specifications
| Specification |
|---|
| Streams # ref-for-cqs-high-water-mark1 |
Browser compatibility
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See also
CountQueuingStrategy()constructor