Function cancel1Algorithm

examples/io/streams/modules/streams.js:1054–1063

(reason)

		return Promise.resolve(undefined);
	}
	function cancel1Algorithm(reason) {
		canceled1 = true;
		reason1 = reason;
		if (canceled2 === true) {
			const compositeReason = [reason1, reason2];
			const cancelResult = ReadableStreamCancel(stream, compositeReason);
			resolvePromise(cancelPromise, cancelResult);
		}
		return cancelPromise.promise;
	}
	function cancel2Algorithm(reason) {
		canceled2 = true;
		reason2 = reason;