The ByteLengthQueuingStrategy()
constructor creates and returns a ByteLengthQueuingStrategy
object instance.
The ByteLengthQueuingStrategy()
constructor creates and returns a ByteLengthQueuingStrategy
object instance.
js
new ByteLengthQueuingStrategy(highWaterMark)
An object with the following property:
highWaterMark
The total number of bytes that can be contained in the internal queue before backpressure is applied.
Unlike CountQueuingStrategy()
where the highWaterMark
parameter specifies a simple count of the number of chunks, with ByteLengthQueuingStrategy()
, the highWaterMark
parameter specifies a number of bytes — specifically, given a stream of chunks, how many bytes worth of those chunks (rather than a count of how many of those chunks) can be contained in the internal queue before backpressure is applied.
An instance of the ByteLengthQueuingStrategy
object.
None.
js
const queuingStrategy = new ByteLengthQueuingStrategy({ highWaterMark: 1 * 1024, }); const readableStream = new ReadableStream( { start(controller) { // … }, pull(controller) { // … }, cancel(err) { console.log("stream error:", err); }, }, queuingStrategy, ); const size = queuingStrategy.size(chunk);
Specification |
---|
Streams Standard # blqs-constructor |
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
ByteLengthQueuingStrategy |
52 | 16 | 65 | No | 39 | 10.1 | 52 | 52 | 65 | 41 | 10.3 | 6.0 |
ByteLengthQueuingStrategy
interface
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https://developer.mozilla.org/en-US/docs/Web/API/ByteLengthQueuingStrategy/ByteLengthQueuingStrategy