mdn-issue-by-spec

W3C-relevant MDN issues

Issues filed on MDN Web Docs related to pages attached to technologies developed by W3C.

• [selectors-4] Include an example of using :has to select a parent element (2025-08-11T18:43:00Z)

• [cookie-store] CookieStore get() method return object should only support name and value (2025-08-04T11:10:38Z)

• [filter-effects-2] Backdrop Root concept undocumented (2025-08-03T06:46:17Z)

• [css-backgrounds-4] Rethink description comment format in CSS syntax boxes (2025-07-22T09:16:06Z)

• [webusb] USB.requestDevice new `exclusionFilters` option (2025-07-15T12:34:44Z)

• [screen-orientation] ScreenOrientation.unlock exceptions description inaccurate (2025-07-14T21:48:31Z)

• [WebIDL-1] QuotaExceededError is being upgraded to a standalone error type (2025-07-08T04:51:26Z)

• [geometry-1] DOMRect.toJSON method description is misleading (2025-07-07T11:52:23Z)

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

• [WebCryptoAPI] Clarify ‘extractable’ parameter behavior when ‘SubtleCrypto.generateKey’ is used with asymmetric key algorithms (2025-05-12T21:11:50Z)

• [css-fonts-5] font-size-adjust does not only affect fallback font (2025-05-02T11:43:00Z)

• [SVG11] SVG examples should be written in proper XML syntax (2025-01-22T23:39:56Z)

• [CSS21, css-display-3] CSS+JS Accessibility best practices - hidden things section - is not promoting best practices (2025-01-06T15:29:04Z)

• [requestidlecallback] timeRemaining() documentation should flag that it doesn’t just count down (2024-12-17T22:44:09Z)

• [html, uievents] Inconsistency in dragover event timing information (2024-11-07T19:25:18Z)

• [webauthn-3] Webauthn: getClientExtensionResults() returns a AuthenticationExtensionsClientOutputs, not a Map (2024-11-06T11:36:55Z)

• [css-font-loading-3] FontFace doc: sizeAdjust is missing (2024-10-31T07:23:20Z)

• [referrer-policy] Add information to Referrer-Policy docs about how it can affect the Origin header (2024-10-28T18:04:13Z)

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

• [css-pseudo-4] Add new information about recent CSS inheritance changes with CSS selection and highlight pseudo-classes (2024-10-23T11:07:23Z)

• [media-source] SourceBuffer.appendBuffer() can cause an exception to be thrown because of QuotaExceeded (2024-10-18T20:01:55Z)

• [touch-events] Note difference in how Touch.screenX/screenY, Touch.clientX/clientY and Touch.pageX/pageY handle zooming (2024-10-14T10:01:23Z)

• [css-pseudo-4] File selector can be styled (2024-09-28T18:18:41Z)

• [webrtc] webrtc: Call createDataChannel after createOffer (2024-09-18T12:11:30Z)

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

• [selectors-4] Add CSS `:has()` selector performance tips (2024-07-20T17:16:05Z)

• [appmanifest] IsStandaloneContent does not work with `display: fullscreen` in Chrome Android (2024-07-19T15:53:57Z)

• [hr-time-3] What are the ramifications of `performance.now()` bugs? (2024-05-26T19:52:08Z)

• [periodic-background-sync] periodicSync needs “periodic-background-sync” permission (2024-05-21T08:55:15Z)

• [html, mediacapture-streams] Unclear example of MediaStream: getTrackById() method (2024-04-29T11:34:54Z)

• [webxr] Explanation of `bounded-floor`/`local`/`local-floor` needs improvement (2024-04-16T04:22:18Z)

• [css-shadow-parts-1] Incorrect statement about pseudo-elements needing to come last in a selector (2024-04-05T20:16:52Z)

• [selection-api] Correct and split “How whitespace is handled by HTML, CSS, and in the DOM” (2023-07-30T09:11:04Z)

• [css-typed-om-2] CSS Typed OM pages have stub examples sections (2023-07-22T02:25:00Z)

• [webrtc] Incorrectly states that RTCRtpTransceiver.mid is null until negotiation is completed. (2023-06-23T10:39:29Z)

• [IndexedDB-3] “Using IndexedDB” guide seems to be out of sync with the more specific documentation (2023-06-14T18:17:39Z)

• [webrtc] api.RTCDataChannel.send - Wrong or obsolete exception list (2023-05-16T11:38:12Z)

• [IndexedDB-3] versionchange is super important and hardly is given any attention (2023-05-08T06:47:05Z)

• [IndexedDB-3] leading the developer down a dead end in onupgradeneeded (2023-05-08T06:34:43Z)

• [cssom-view-1] Guide on reflow and performance optimizations (2023-04-21T01:08:41Z)

• [screen-capture] MediaDevices#getDisplayMedia(): systemAudio is misleading (2023-03-14T03:38:33Z)

• [filter-effects-2] feGaussianBlur needs guidance about setting height and width (2023-02-04T21:15:51Z)

• [SVG11] textPath attribute method doesn’t seem to have an effect (2023-02-01T16:11:22Z)

• [webrtc] What is `RTCPeerConnection.generateCertificate(..)` good for? (2023-01-30T20:28:26Z)

• [css-align-3] New section to link from longhand to shorthand property (2022-09-16T06:36:39Z)

• [IndexedDB-3] indexedDB.deleteDatabase doc: Mention that deleting a database isn’t completed until the upgradeNeeded result is closed (2022-09-07T00:12:45Z)

• [uievents] Event references should list bubbles, cancelable, and composed values (2022-08-15T13:38:07Z)

• [WebCryptoAPI] Precise max length for encoding algorithm (2022-07-06T14:47:35Z)

• [html, gamepad] Double checking the gamepad docs are correct (2022-04-11T03:02:09Z)

• [hr-time-3, performance-timeline-2, resource-timing-2, user-timing-2] Topic on setting HTTP priority of resource requests (2022-04-08T02:53:08Z)

• [webaudio] “ConvolverNode”: provide a simpler example that I can adapt to more complex examples (connecting it to another node does not work) (2022-03-18T14:35:29Z)

• [web-animations-2, css-animations-2] Issue with “Element.animate()”: wrong scenario mentioned (2022-03-04T07:40:26Z)

• [encoding] Content suggestion: ImageDecoder & ImageTrackList how-to/tutorial (2022-02-07T04:15:29Z)

• [cssom-view-1] Issue with “Document: scroll event”: Example using rAF in scroll-event callbacks is outdated, and anti-performance (2022-02-04T00:25:49Z)

• [service-workers-1, dom, cssom-view-1, notifications, pointerevents3] Page titles should reflect usage: crypto.getRandomValues instead of Crypto: getRandomValues() (2021-09-16T10:09:38Z)

• [SVG11] “SVGSVGElement.viewBox.baseVal”: when viewBox unset, it is null in FF but a 0-SVGRect in Chrome (2021-09-14T14:00:23Z)

• [service-workers-1] Issue with “ServiceWorkerContainer.register()”: may be advisable to check for an existing registration (2021-07-21T16:35:44Z)

• [webaudio] Content bug: AudioListener and attributes need better examples. (2021-04-26T03:22:48Z)

• [presentation-api] Presentation API docs need rewrite (2021-04-12T01:16:00Z)

• [webaudio] Visualization for OscillatorNode (2021-01-14T10:42:13Z)