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The abort() method of the WritableStreamDefaultWriter interface aborts the stream, signaling that the producer can no longer successfully write to the stream and it is to be immediately moved to an error state, with any queued writes discarded. 

 If the writer is active, the abort() method behaves the same as that for the associated stream (WritableStream.abort()). If not, it returns a rejected promise.


Promise<reason> writableStreamDefaultWriterInstance.abort(reason);


reason Optional
A DOMString representing a human-readable reason for the abort.

Return value

A Promise, which fulfills with the value given in the reason parameter.


The stream you are trying to abort is not a WritableStream, or it is locked.


const writableStream = new WritableStream({
  write(chunk) {
  close() {
  abort(err) {
}, queuingStrategy);


const writer = writableStream.getWriter();


// abort the stream when desired
writer.abort.then((reason) => {


Specification Status Comment
The definition of 'abort()' in that specification.
Living Standard Initial definition.

Browser compatibility

No compatibility data found. Please contribute data for "" (depth: 1) to the MDN compatibility data repository.

Document Tags and Contributors

 Contributors to this page: chrisdavidmills
 Last updated by: chrisdavidmills,