whatwg/streams

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Streams Standard

Stars: 1.4k
Forks: 178
Open beginner issues: 0
Indexed issues: 121

Dominant language: HTML
License: No license data
Last GitHub push: Aug 18, 2026
Latest indexed: Sep 20, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
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PR merge metrics: No merged PRs in 30d

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121 open issues indexed

Why do Readers and Writers have constructors? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

whatwg/streams#1381 · Opened Sep 10, 2026
Revisiting ReadableStream.from(syncIter) and ReadableStream.from(str) Open

addition/proposal needs implementer interest

Difficulty 5/5 Over a week Newbie friendliness 38/100

whatwg/streams#1376 · 2 comments · Opened Jul 13, 2026
Use `mark as handled` Web IDL phrase instead of using `PromiseIsHandled` internal slot directly Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

whatwg/streams#1373 · Opened May 4, 2026
Proposal: `ReadableStream.withSafeResolvers()` Open

addition/proposal needs implementer interest

Difficulty 5/5 Over a week Newbie friendliness 35/100

whatwg/streams#1359 · 9 comments · 1 reaction · Opened Nov 15, 2025
Allow error to be provided to reader.releaseLock() Open

addition/proposal needs implementer interest

Difficulty 5/5 Over a week Newbie friendliness 35/100

whatwg/streams#1358 · 4 comments · Opened Oct 7, 2025
TransformStreams have an unforuntate design Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

whatwg/streams#1351 · 1 comment · Opened Aug 8, 2025
The Internal Queue of streams should be exposed upon stream cancellation for proper clean up of pending chunks. Open

addition/proposal needs implementer interest

Difficulty 5/5 Over a week Newbie friendliness 35/100

whatwg/streams#1350 · 1 comment · Opened Aug 8, 2025
Why does the `read` method of `ReadableStreamBYOBReader` class, need to _transfer_ the buffer it is provided? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

whatwg/streams#1348 · 17 comments · Opened Jul 26, 2025
Clarify that `ReadableStream`'s `cancel` may be invoked before `start` is complete Open

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

whatwg/streams#1344 · Opened Apr 28, 2025
Clarify expected behaviour when breaking async iteration of teed ReadableStream Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

whatwg/streams#1343 · 1 reaction · Opened Apr 17, 2025
Shouldn't WritableStreamDefaultWriter.write() reject if underlyingSink.write calls controller.error()? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

whatwg/streams#1332 · 2 comments · Opened Nov 21, 2024
Unified way to clean up after ReadableStream finished/errored/was canceled Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

whatwg/streams#1329 · 1 comment · Opened Oct 28, 2024
Stream read hangs when stream is closed during a BYOB read Open

Difficulty 4/5 3-5 days Newbie friendliness 38/100

whatwg/streams#1321 · 4 comments · Opened Aug 7, 2024
read all bytes usage/signature may be hard to understand Open

clarification

Difficulty 3/5 1-2 days Newbie friendliness 35/100

whatwg/streams#1315 · 5 comments · 1 reaction · Opened May 20, 2024
read all bytes: Why only Uint8Array instead of general BufferSource? Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

whatwg/streams#1299 · 1 reaction · Opened Nov 14, 2023
Timing differences on start promise on WritableStream Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

whatwg/streams#1298 · 7 comments · Opened Oct 18, 2023
Test or specification problem with TransformStream readable.cancel and calling controller.error Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

whatwg/streams#1296 · 9 comments · Opened Oct 14, 2023
Consider making writer.abort() automatically generate an "AbortError" DOMException? Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

whatwg/streams#1290 · 2 reactions · Opened Jul 14, 2023
reader.cancel([ reason ]) "behaves the same as stream.cancel(reason)" is confusing Open

clarification

Difficulty 2/5 1-3 hours Newbie friendliness 52/100

whatwg/streams#1287 · 1 comment · 1 reaction · Opened Jul 7, 2023
Reuse HTML structuredClone for owning streams Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

whatwg/streams#1285 · 1 comment · Opened Jun 12, 2023
Recoverable error from failed parameter validation? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

whatwg/streams#1280 · 4 comments · Opened May 25, 2023
Synchronous WritableStream Writer to avoid heap allocations from Promises returned by WritableStreamDefaultWriter's write Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

whatwg/streams#1276 · 2 comments · Opened Apr 21, 2023
Latency-bounded reads Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

whatwg/streams#1270 · 4 comments · 2 reactions · Opened Apr 7, 2023
async iteration over a ReadableStream containing a rejected Promise will not clean up Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

whatwg/streams#1266 · 3 comments · Opened Apr 5, 2023
Efficient mapping to Unix-style APIs with pollable readers and writers Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

whatwg/streams#1265 · 2 comments · Opened Apr 5, 2023
"If flushPromise was rejected with reason r, the..." Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

whatwg/streams#1262 · 1 comment · Opened Mar 23, 2023
Why resolve backpressurePromise by an error message in SetUpCrossRealmTransformWritable? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

whatwg/streams#1260 · Opened Feb 24, 2023
Should cancelation error from UnderlyingSource be transferred too? Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

whatwg/streams#1259 · 1 comment · Opened Feb 24, 2023
Should terminating a worker close/error streams? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

whatwg/streams#1256 · 3 comments · Opened Feb 17, 2023
Cancelling and exception handling async iteration of ReadableStreams Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

whatwg/streams#1255 · 12 comments · 2 reactions · Opened Feb 7, 2023
Should the "set up" algorithm for IDL-created WritableStreams wrap the write algorithm? Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

whatwg/streams#1253 · 1 comment · Opened Jan 30, 2023
Should the underlying source be pinged for cancel when a close request exists? Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

whatwg/streams#1252 · 1 comment · Opened Jan 21, 2023
Examine interaction of resizable array buffers with Streams Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

whatwg/streams#1248 · 5 comments · Opened Nov 21, 2022
Can pipeTo() be synchronous? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

whatwg/streams#1243 · 6 comments · Opened Oct 14, 2022
Performance optimization: `ReadableStreamDefaultReader.prototype.readMany` Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

whatwg/streams#1236 · 3 comments · Opened Jun 14, 2022
Proposal: ReadableStream tee() backpressure Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

whatwg/streams#1235 · 10 comments · 8 reactions · Opened Jun 13, 2022
Do the abort steps of ReadableStreamPipeTo really guarantee the abort callback to be called before cancel? Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

whatwg/streams#1229 · 7 comments · Opened Apr 26, 2022
explain better what the pull method should do in the underlying source API Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

whatwg/streams#1228 · 4 comments · Opened Apr 26, 2022
Editorial: update use of, or stop using, completion values? Open

editorial

Difficulty 5/5 Over a week Newbie friendliness 25/100

whatwg/streams#1224 · 8 comments · Opened Mar 3, 2022
Link to ECMA262 sec-returnifabrupt-shorthands? Open

Difficulty 2/5 1-3 hours Newbie friendliness 42/100

whatwg/streams#1223 · 5 comments · 1 reaction · Opened Mar 2, 2022
How to create a transformed WritableStream that waits for close? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

whatwg/streams#1222 · Opened Feb 24, 2022
WritableStreamDefaultController [[strategySizeAlgorithm]] called after being set to undefined Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

whatwg/streams#1218 · 2 comments · Opened Feb 15, 2022
Returning buffers to the underlying source Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

whatwg/streams#1217 · 5 comments · Opened Feb 10, 2022
Specify realm for object creation Open

whatwg/streams#1213 · 8 comments · 1 assignee · Opened Jan 24, 2022
pipeTo: Read fulfilled after shutdown started Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

whatwg/streams#1207 · 7 comments · Opened Jan 15, 2022
Should the abort result reflect the close result? Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

whatwg/streams#1203 · 6 comments · Opened Jan 6, 2022
Should there be dedicated VideoFrame ReadableStream/WritableStream constructs Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

whatwg/streams#1187 · 4 comments · Opened Nov 16, 2021
Add a realtime mode to ReadableStream.tee Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

whatwg/streams#1186 · 5 comments · Opened Nov 16, 2021
Life-time management of VideoFrame when used with streams Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

whatwg/streams#1185 · 6 comments · Opened Nov 16, 2021
Resolving promises with byte sequences results in UB Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

whatwg/streams#1178 · 12 comments · Opened Oct 20, 2021

whatwg/streams

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