CountQueuingStrategy: highWaterMark property

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

Report problems with this compatibility data on GitHub
desktopmobileserver
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
Deno
Node.js
highWaterMark

Legend

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Full support
Full support

See also