Martin Robinson 1d9d440b22 script: Add basic support for tab navigation (#42952) ...

This change adds very basic support for tab navigation, but without
support for focus scopes. Followup changes will refine the behavior of
this implementation to follow the specification around focus scopes,
shadow DOM, and slots. In particular `delegatesFocus` is not supported
here yet.

Testing: This causes quite a few WPT tests to start passing.

Signed-off-by: Martin Robinson <mrobinson@igalia.com>
Co-authored-by: Oriol Brufau <obrufau@igalia.com>

2026-03-02 20:42:25 +00:00

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