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This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The WritableStreamDefaultController()
constructor creates and returns a WritableStreamDefaultController()
object instance.
Note: You wouldn't use this constructor manually — this is used during the construction of a WritableStream
object.
var writableStreamController = new WritableStreamDefaultController(stream, underlyingSink, size, highWaterMark);
WritableStream
to be controlled.WritableStream()
constructor's parameter definitions for more information.chunk
— this indicates the size to use for each chunk, in bytes.An instance of the WritableStreamDefaultController
object.
stream
parameter is not a WritableStream
, or it already has an associated controller.const writableStream = new WritableStream({ start(controller) { // do stuff with controller // error stream if necessary controller.error('My error is broken'); }, write(chunk, controller) { ... }, close(controller) { ... }, abort(err) { ... } });
Specification | Status | Comment |
---|---|---|
Streams The definition of 'WritableStreamDefaultController()' in that specification. | Living Standard | Initial definition. |
No compatibility data found. Please contribute data for "path.to.feature.NameOfTheConstructor" (depth: 1) to the MDN compatibility data repository.
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https://developer.mozilla.org/en-US/docs/Web/API/WritableStreamDefaultController/WritableStreamDefaultController