Re: [whatwg/streams] Add support for ReadableStream "transfer" type (PR #1271)

@youennf commented on this pull request.



> @@ -6368,7 +6390,11 @@ for="value-with-size">value</dfn> and <dfn for="value-with-size">size</dfn>.
  1. Assert: |container| has \[[queue]] and \[[queueTotalSize]] internal slots.
  1. If ! [$IsNonNegativeNumber$](|size|) is false, throw a {{RangeError}} exception.
  1. If |size| is +∞, throw a {{RangeError}} exception.
- 1. [=list/Append=] a new [=value-with-size=] with [=value-with-size/value=] |value| and
+ 1. Let |enqueuedValue| be |value|.
+ 1. If |container|.\[[isTransferring]] is true, perform the following steps:

If no slot, then my understanding is that the value is undefined, which is different from true.
That said, the end plan is to use transfer for writable streams as well, which would probably allow reusing the same 1EnqueueValueWithSize`.


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