mdn-issue-by-spec

WHATWG-relevant MDN issues

Issues filed on MDN Web Docs related to pages attached to technologies developed by WHATWG.

• [html] Document scopedcustomelementregistry and its HTMLElement reflection (2026-08-28T23:26:43Z)

• [dom] Add Processing Instructions guide (2026-08-25T11:33:22Z)

• [html] The upgrade step of custom elements are missing in the `define` page ? (2026-08-19T13:07:46Z)

• [html] Clarify that `CustomElementRegistry.define()` triggers a read of `static observedAttributes` (2026-08-10T06:05:17Z)

• [html, uievents] A `load` event listener/handler must “atomically” accompany its element (2026-06-28T15:39:35Z)

• [streams] ReadableStream `desiredSize` is not always an integer (2026-06-16T14:40:37Z)

• [html] pushState() and navigations and history navigation rate limiting no longer throws (2026-06-15T16:42:56Z)

• [html] ElementInternals.labels: No screen reader information (2026-06-09T12:18:46Z)

• [html, cssom-1] Site-wide: Examples with outdated HTML containing submittable forms can break (2026-06-03T19:55:48Z)

• [html] Cannot prevent cancel when user presses Escape twice (2026-04-27T12:23:34Z)

• [html] Detecting dragged file type is done by extension (2026-04-15T21:11:15Z)

• [cssom-view-1, dom, pointerevents3, pointerlock-2, fullscreen, DOM-Parsing] Refine short-title of WebAPI event pages (2026-03-24T16:11:53Z)

• [html] Web Storage API documentation pages fail to mention state partitioning (2026-02-26T10:43:03Z)

• [notifications] showNotification: clarify difference between badge, icon, and image (2025-12-22T22:10:35Z)

• [html] Update uses of `PredefinedColorSpace` to include `srgb-linear` and `display-p3-linear` (2025-11-21T17:38:23Z)

• [html] Caret position not mentioned or demonstrated for setSelectionRange() (2025-10-19T00:50:03Z)

• [html] The figure doesn’t show the direction of rotation (2025-10-16T00:30:25Z)

• [dom] HTML element, attribute, and doctype name validation rules are changing (2025-07-15T04:32:47Z)

• [html, css-backgrounds-4, requestidlecallback] Reference page titles are not consistent and need improvements (2025-06-11T04:16:02Z)

• [html] Clarify image.decode() failure on lazy-loaded images (2025-02-08T00:22:15Z)

• [html, wai-aria-1.2] All `ElementInternals` docs for `ARIAMixin` properties are incorrect (2024-10-26T03:40:30Z)

• [html, uievents, dom] Event pages: claim (or imply) that onXYZ and addEventListener are equivalent but they are not (2024-08-09T02:19:02Z)

• [html] Improve `messageerror` example to show a case in which the event is fired (2024-07-25T16:05:45Z)

• [html] Add description and recommendation about unicode LTR and RTL marks (2024-04-19T14:56:10Z)

• [html] document inheritance of HTML directionality and language and its relationship to shadow DOM (2023-10-06T12:28:00Z)

• [html] Article element in a wrong implementation (2023-09-13T12:53:45Z)

• [html] Custom element constructor `disabledFeatures` property undocumented (2021-07-06T07:29:36Z)