Re: [whatwg/streams] The implementation of ByteLengthQueuingStrategy does not behave as expect (#551)

No, `highWaterMark` is the (target) maximum amount that a ReadableStream wants to buffer, not a minimum. If nothing reads from the ReadableStream, and if the underlyingSource respects backpressure (by refusing to enqueue new chunks when `controller.desiredSize <= 0`), the internal queue will stay at or below the HWM.

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