Function WritableStreamAbort

examples/io/streams/modules/streams.js:2368–2393

(stream, reason)

	}
}
function WritableStreamAbort(stream, reason) {
	let state = stream.state;
	if ((state == "closed") || (state == "errored")) {
		return Promise.resolve(undefined);
	}
	stream.controller.abortController.abort(reason);
	state = stream.state;
	if ((state == "closed") || (state == "errored")) {
		return Promise.resolve(undefined);
	}
	if (stream.pendingAbortRequest !== undefined)
		return stream.pendingAbortRequest.promise;
	assert((state == "writable") || (state == "erroring"));
	let wasAlreadyErroring = false;
	if (state == "erroring") {
		wasAlreadyErroring = true;
		reason = undefined;
	}
	let pendingAbortRequest = createPromise();
	pendingAbortRequest.reason = reason; 
	pendingAbortRequest.wasAlreadyErroring = wasAlreadyErroring; 
	stream.pendingAbortRequest = pendingAbortRequest 
	if (wasAlreadyErroring === false)
		WritableStreamStartErroring(stream, reason);
	return pendingAbortRequest.promise;
}
function WritableStreamClose(stream) {
	let state = stream.state;
	if ((state == "closed") || (state == "errored"))