TransformStream transformer cancel() methodThe cancel() method of a TransformStream transformer cleans up resources when the readable side cancels or the writable side aborts.streamsStreamslimitedhttps://streams.spec.whatwg.org/#dom-transformer-cancelhttps://developer.mozilla.org/docs/Web/API/TransformStream/TransformStreamapi.TransformStream.TransformStream.transformer_cancelhttps://nowyoucanuse.com/features--transformstream-transformer-cancel.html