Callum Law 8b66e7f463 LibWeb: Consider semicolon in parse_descriptor_value a SyntaxError ...

Everywhere we use this expects us to parse the whole value, either
because we are parsing the value of a declaration (in which case there
will be no semicolons), or because it is called from a JS setter which
takes whole values and semicolons make the value invalid.

Previously we would just ignore everything after a semicolon.

This also allows us to avoid creating a new `Vector` and copying all the
component values

2026-03-30 19:57:36 +01:00

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