Create nodes in the realm of the document they are created for#12669
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Follow DOM in creating parsed nodes in the relevant realm of their node document rather than the realm running the parser, resolving a cross-browser interoperability issue. Depends on whatwg/dom#1491.
sideshowbarker
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Jul 17, 2026
annevk
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Which realm a node is created in was unspecified, so implementations disagreed when a node was created for a document whose relevant realm differed from the one running the algorithm (e.g., parsing, importing, or cloning into an adopted node's document). This also makes the HTML parser initialize processing instructions, populating their attribute map as createProcessingInstruction() and the constructor already did. Tests: web-platform-tests/wpt#61212 HTML PR: whatwg/html#12669 Fixes #977.
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Follow DOM in creating parsed nodes in the relevant realm of their node document rather than the realm running the parser, resolving a cross-browser interoperability issue.
Depends on whatwg/dom#1491.
(See WHATWG Working Mode: Changes for more details.)
/common-dom-interfaces.html ( diff )
/dom.html ( diff )
/dynamic-markup-insertion.html ( diff )
/form-elements.html ( diff )
/infrastructure.html ( diff )
/parsing.html ( diff )
/scripting.html ( diff )
/xhtml.html ( diff )