Adam Colvin d2f10c76fd LibWeb: Reject invalid alt text values in CSS content property parsing ...

The CSS content property's alt text (after `/`) was incorrectly
accepting any content value. Per the CSS Content Module Level 3 spec,
alt text only accepts <string>, <counter>, and <attr()> values. This
change adds type validation in the alt text parsing branch to reject
URLs, quote keywords, images, and other non-alt-text value types.

This fixes 64 subtests in the content-invalid WPT test.

2026-02-22 13:55:22 -05:00

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content-computed.txt

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content-invalid.txt

LibWeb: Reject invalid alt text values in CSS content property parsing

2026-02-22 13:55:22 -05:00

content-valid.txt

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