Andrei Volykhin 99fbd36b5d html: Properly count <image>/<source> insertion/removal steps as the relevant mutations (#39452) ...

Follow the HTML specification and take into account that the HTML
`<image>/<source>` element inserting/removal steps should only be
counted as relevant mutations for `<image>` element if the parent of the
inclusive ancestor that was inserted/removed is the parent `<picture>`
element.

See <https://html.spec.whatwg.org/multipage/#relevant-mutations>.

Testing: Improvements in the following tests
-
html/semantics/embedded-content/the-img-element/relevant-mutations.html

Signed-off-by: Andrei Volykhin <andrei.volykhin@gmail.com>

2025-09-23 12:40:03 +00:00

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