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HTML fragment parsing algorithm needs to set its document's base url

Status: Open.

#12210 In whatwg/html;

· AtkinsSJ opened on Feb 27, 2026

HTML fragment parsing algorithm needs to set its document's custom element registry

topic: custom elementsRelates to custom elements (as defined in DOM and HTML)Relates to custom elements (as defined in DOM and HTML)

topic: parser

Status: Open.

#12209 In whatwg/html;

· AtkinsSJ opened on Feb 27, 2026

Upcoming WHATNOT meeting on 2026-03-05

agenda+To be discussed at a triage meetingTo be discussed at a triage meeting

Status: Open.

#12206 In whatwg/html;

· cwilso opened on Feb 26, 2026

sizes=auto needs to be explicit on timing

topic: img

Status: Open.

#12204 In whatwg/html;

· emilio opened on Feb 26, 2026

Proposal: Reflect whether an element is "open" (children being parsed)

addition/proposalNew features or enhancementsNew features or enhancements

needs implementer interestMoving the issue forward requires implementers to express interestMoving the issue forward requires implementers to express interest

Status: Open.

#12200 In whatwg/html;

· noamr opened on Feb 25, 2026

option and optgroup rendering requirements

topic: rendering

topic: selectThe <select> elementThe <select> element

Status: Open.

Bug

#12199 In whatwg/html;

· annevk opened on Feb 25, 2026

Is &lt;slot dir=auto&gt; special case needed?

Status: Open.

#12192 In whatwg/html;

· vinhill opened on Feb 24, 2026

Implementation-defined ordering of task queues leading to interoperability issue with <code>popstate</code> and <code>hashchange</code> events

topic: navigation

Status: Open.

#12190 In whatwg/html;

· avandolder opened on Feb 24, 2026

Proposal: Improve UI stepping behavior in &lt;input type="number"&gt;

addition/proposalNew features or enhancementsNew features or enhancements

needs implementer interestMoving the issue forward requires implementers to express interestMoving the issue forward requires implementers to express interest

Status: Open.

#12188 In whatwg/html;

· xavierholt opened on Feb 22, 2026

Special case label associated with a button in popover light dismiss

addition/proposalNew features or enhancementsNew features or enhancements

needs implementer interestMoving the issue forward requires implementers to express interestMoving the issue forward requires implementers to express interest

topic: popoverThe popover attribute and friendsThe popover attribute and friends

Status: Open.

#12185 In whatwg/html;

· lukewarlow opened on Feb 20, 2026

:hover and :active changes for &lt;select&gt;

topic: selectThe <select> elementThe <select> element

topic: selectors

Status: Open.

#12183 In whatwg/html;

· annevk opened on Feb 20, 2026

Signaling abort before nulling out onging event in #abort-a-navigateevent can trigger assert in firing navigate event

topic: navigation

Status: Open.

Bug

#12180 In whatwg/html;

· farre opened on Feb 19, 2026