WritableStreamDefaultWriter: abort() method

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.

abort()
abort(reason)

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

// ...

const writer = writableStream.getWriter();

// ...

// abort the stream when desired
writer.abort.then((reason) => {
  console.log(reason);
});