whatwg/webidl

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Web IDL Standard

Stars: 502
Forks: 216
Open beginner issues: 0
Indexed issues: 248
Avg merge: 9h 2m
Merged PRs (30d): 2

Dominant language: HTML
License: No license data
Last GitHub push: Aug 31, 2026
Latest indexed: Sep 20, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: good first issue

Beginner friendly Everything

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248 open issues indexed

Invoking a callback interface on a cross-origin Location or WindowProxy enters the other origin's realm Open

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

whatwg/webidl#1640 · Opened Sep 19, 2026
Consider switching the default to [EnforceRange] Open

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

whatwg/webidl#1629 · 2 comments · Opened Aug 20, 2026
Consider switching the default from optional dictionary members to required Open

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

whatwg/webidl#1628 · Opened Aug 20, 2026
Why did we rename `async_iterable` to `async_sequence`? Open

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

whatwg/webidl#1611 · 1 comment · Opened Jun 19, 2026
Is a function signature with a parameter type `(DOMString or Interface)` a footgun? Open

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

whatwg/webidl#1604 · 6 comments · Opened Jun 11, 2026
Can we change promise resolution behaviour to reduce security issues Open

Difficulty 5/5 Over a week Newbie friendliness 28/100

whatwg/webidl#1584 · 8 comments · 1 reaction · Opened Mar 27, 2026
Reconsider advice to leave dictionary members optional when dictionary is used solely as a return type Open

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

whatwg/webidl#1567 · 1 comment · Opened Jan 31, 2026
Support syntax for specifying that an optional record<K, V> has a default value of an empty record<K, V> Open

addition/proposal needs implementer interest

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

whatwg/webidl#1566 · 9 comments · 2 reactions · Opened Jan 30, 2026
Is nullable dictionary member a footgun? Open

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

whatwg/webidl#1565 · 3 comments · Opened Jan 29, 2026
When creating a global object the realm is not yet initialized Open

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

whatwg/webidl#1547 · 5 comments · Opened Nov 28, 2025
Change enum syntax to reflect real constraints Open

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

whatwg/webidl#1545 · 1 comment · Opened Nov 25, 2025
Parameter types that must be JSON serializable Open

Difficulty 5/5 Over a week Newbie friendliness 28/100

whatwg/webidl#1537 · 3 comments · Opened Nov 6, 2025
`Legacy platform object [[Set]]` inconsistent with default JavaScript `[[Set]]` behavior Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

whatwg/webidl#1536 · 5 comments · Opened Nov 3, 2025
`ReadableStream.values().return(Promise)` inconsistent with async generator behavior Open

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

whatwg/webidl#1522 · 1 reaction · Opened Sep 5, 2025
Require a default value for optional dictionary member of another dictionary? Open

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

whatwg/webidl#1511 · 1 comment · Opened Jul 30, 2025
Allow a separate getter/setter attribute pair Open

addition/proposal needs implementer interest

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

whatwg/webidl#1506 · 1 comment · Opened Jul 19, 2025
Should a no-required-member dictionary argument always be optional regardless of its position? Open

Difficulty 5/5 Over a week Newbie friendliness 28/100

whatwg/webidl#1499 · 2 comments · Opened Jul 7, 2025
Specify best practices for sequence/FrozenArray/ObservableArray Open

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

whatwg/webidl#1495 · 4 comments · Opened Jun 13, 2025
Expected behavior of SharedArrayBuffer with (BufferSource or DOMString) union type Open

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

whatwg/webidl#1491 · Opened May 23, 2025
Add [AllowImmutable] extended attribute for immutable array buffers and views Open

addition/proposal needs implementer interest

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

whatwg/webidl#1487 · 2 comments · 1 reaction · Opened May 16, 2025
Mandate a default value for boolean dictionary members? Open

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

whatwg/webidl#1485 · 12 comments · Opened Apr 24, 2025
Variable in step 9.2 of #wait-for-all should be renamed `fulfillmentHandlerSteps` Open

Difficulty 1/5 Under an hour Newbie friendliness 35/100

whatwg/webidl#1470 · 1 comment · Opened Feb 12, 2025
Accept `iterable` and `async iterable` in functions? Open

addition/proposal needs implementer interest

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

whatwg/webidl#1461 · 6 comments · Opened Jan 6, 2025
Legacy platform objects' [[DefineOwnProperty]] refers to possibly nonexistent Desc.[[Value]] Open

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

whatwg/webidl#1460 · 3 comments · Opened Jan 5, 2025
Add a `disposer` keyword for disposal methods Open

addition/proposal needs implementer interest

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

whatwg/webidl#1459 · 5 comments · 2 reactions · Opened Dec 22, 2024
"an exception was thrown" is not consistently used Open

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

whatwg/webidl#1455 · 2 comments · Opened Dec 13, 2024
Consider adding a URLString type Open

addition/proposal needs implementer interest

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

whatwg/webidl#1454 · 3 comments · Opened Dec 4, 2024
Consider adding an `[InjectionMitigated]` extended attribute. Open

addition/proposal needs implementer interest security-tracker security/privacy

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

whatwg/webidl#1440 · 8 comments · 1 reaction · Opened Oct 7, 2024
ConvertToInt should take an explicit argument for its conversion approach Open

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

whatwg/webidl#1439 · 3 reactions · Opened Oct 3, 2024
What types are allowed where is scattered and inconsistent Open

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

whatwg/webidl#1414 · Opened Jun 26, 2024
Should [SameObject] be allowed with FrozenArray<T>? Open

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

whatwg/webidl#1402 · 5 comments · Opened Apr 26, 2024
Intent to use BigInt/numeric union in WebNN Open

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

whatwg/webidl#1388 · 6 comments · 3 reactions · Opened Feb 17, 2024
"byte length of a buffer source type" needs updating for resizable and detached buffers Open

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

whatwg/webidl#1385 · 13 comments · Opened Jan 21, 2024
Dictionary with required members as optional argument Open

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

whatwg/webidl#1378 · 4 comments · Opened Dec 13, 2023
Truncation in "convert a Web IDL arguments list to an ECMAScript arguments list" seems (potentially) incorrect Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

whatwg/webidl#1377 · Opened Dec 12, 2023
Offer [[ArrayBufferDetachKey]] abstraction? Open

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

whatwg/webidl#1375 · Opened Nov 16, 2023
Allowing throwing an exception with a specific message Open

addition/proposal needs implementer interest

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

whatwg/webidl#1374 · 5 comments · Opened Nov 8, 2023
Add `toggle()` and `replace()` methods to `setlike` Open

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

whatwg/webidl#1370 · 2 comments · 1 reaction · Opened Oct 11, 2023
Definition of {} is slightly ambiguous Open

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

whatwg/webidl#1344 · 2 comments · 1 reaction · Opened Jul 17, 2023
Make ObservableArray "subclassable" Open

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

whatwg/webidl#1342 · 3 comments · Opened Jul 14, 2023
Nullable ObservableArray attributes are not supported Open

whatwg/webidl#1337 · 1 comment · 1 reaction · 1 assignee · Opened Jul 3, 2023
Suggestion: forbid ECMA-262/402-defined global names for some named constructs Open

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

whatwg/webidl#1331 · 2 comments · Opened Jun 25, 2023
Definition name uniqueness requirement omits mixins Open

Difficulty 2/5 1-3 hours Newbie friendliness 38/100

whatwg/webidl#1330 · Opened Jun 25, 2023
Meta: npm warnings Open

meta

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

whatwg/webidl#1329 · 1 comment · Opened Jun 24, 2023
Language-independent definition of interfaces should mention how to create instances Open

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

whatwg/webidl#1327 · 5 comments · Opened Jun 21, 2023
Defining AbstractModuleSource intrinsic inheritance Open

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

whatwg/webidl#1322 · 13 comments · Opened Jun 16, 2023
Give SharedArrayBuffer a dedicated type (downstream) Open

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

whatwg/webidl#1320 · 2 comments · Opened Jun 14, 2023
Simple exceptions “apart from...” list is incomplete Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

whatwg/webidl#1314 · 1 comment · Opened Jun 3, 2023
Buffer source types infrastructure Open

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

whatwg/webidl#1312 · 3 comments · Opened Jun 2, 2023
Throwing DOMExceptions in the context of a promise returning operation Open

clarification

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

whatwg/webidl#1301 · 2 comments · Opened May 4, 2023

whatwg/webidl

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