Issues

• Writing twice synchronously on a native no-backpressure WritableStream may have surprising effects

  whatwg/streams#1385 · Filter by author youennf opened on Oct 9, 2026
  1

• Promise-returning algorithms under "Using streams in other specifications" should mark the resulting promises as handled

  whatwg/streams#1384 · Filter by author saschanaz opened on Oct 6, 2026

• "close a WritableStream" is not safe without checking WritableStreamCloseQueuedOrInFlight

  whatwg/streams#1383 · Filter by author saschanaz opened on Oct 1, 2026
  1

• Why do Readers and Writers have constructors?

  whatwg/streams#1381 · Filter by author saschanaz opened on Sep 10, 2026

• Revisiting ReadableStream.from(syncIter) and ReadableStream.from(str)

  addition/proposalneeds implementer interest
  whatwg/streams#1376 · Filter by author jasnell opened on Jul 13, 2026
  2

• Use mark as handled Web IDL phrase instead of using PromiseIsHandled internal slot directly

  whatwg/streams#1373 · Filter by author saschanaz opened on May 4, 2026

• Proposal: ReadableStream.withSafeResolvers()

  addition/proposalneeds implementer interest
  whatwg/streams#1359 · Filter by author juner opened on Nov 15, 2025
  9

• Allow error to be provided to reader.releaseLock()

  addition/proposalneeds implementer interest
  whatwg/streams#1358 · Filter by author jakearchibald opened on Oct 7, 2025
  4

• TransformStreams have an unforuntate design

  whatwg/streams#1351 · Filter by author BlackAsLight opened on Aug 8, 2025
  1

• The Internal Queue of streams should be exposed upon stream cancellation for proper clean up of pending chunks.

  addition/proposalneeds implementer interest
  whatwg/streams#1350 · Filter by author BlackAsLight opened on Aug 8, 2025
  1

• Why does the read method of ReadableStreamBYOBReader class, need to _transfer_ the buffer it is provided?

  whatwg/streams#1348 · Filter by author amn opened on Jul 26, 2025
  17

• Clarify that ReadableStream's cancel may be invoked before start is complete

  whatwg/streams#1344 · Filter by author ardislu opened on Apr 28, 2025

• Clarify expected behaviour when breaking async iteration of teed ReadableStream

  whatwg/streams#1343 · Filter by author lukasIO opened on Apr 17, 2025

• Shouldn't WritableStreamDefaultWriter.write() reject if underlyingSink.write calls controller.error()?

  whatwg/streams#1332 · Filter by author jedwards1211 opened on Nov 21, 2024
  2

• Unified way to clean up after ReadableStream finished/errored/was canceled

  whatwg/streams#1329 · Filter by author jedwards1211 opened on Oct 28, 2024
  1

• Stream read hangs when stream is closed during a BYOB read

  whatwg/streams#1321 · Filter by author bschick opened on Aug 7, 2024
  4

• read all bytes usage/signature may be hard to understand

  clarification
  whatwg/streams#1315 · Filter by author morlovich opened on May 20, 2024
  5

• read all bytes: Why only Uint8Array instead of general BufferSource?

  whatwg/streams#1299 · Filter by author saschanaz opened on Nov 14, 2023

• Timing differences on start promise on WritableStream

  whatwg/streams#1298 · Filter by author saschanaz opened on Oct 18, 2023
  7

• Test or specification problem with TransformStream readable.cancel and calling controller.error

  whatwg/streams#1296 · Filter by author evilpie opened on Oct 14, 2023
  9

• Consider making writer.abort() automatically generate an "AbortError" DOMException?

  whatwg/streams#1290 · Filter by author domenic opened on Jul 14, 2023

• reader.cancel([ reason ]) "behaves the same as stream.cancel(reason)" is confusing

  clarification
  whatwg/streams#1287 · Filter by author jedwards1211 opened on Jul 7, 2023
  1

• Reuse HTML structuredClone for owning streams

  whatwg/streams#1285 · Filter by author youennf opened on Jun 12, 2023
  1

• Recoverable error from failed parameter validation?

  whatwg/streams#1280 · Filter by author saschanaz opened on May 25, 2023
  4

• Synchronous WritableStream Writer to avoid heap allocations from Promises returned by WritableStreamDefaultWriter's write

  whatwg/streams#1276 · Filter by author btakita opened on Apr 21, 2023
  2