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Oleg Isonen 95dc7f0a75 fix: Validate malformed CSS variable values (#5787 )

**Summary**

Validates CSS custom property values as raw CSS token streams before
saving/parsing them.

This prevents malformed values like `#sd'` from being normalized into
`sd` or serialized into broken canvas CSS that invalidates the whole
generated rule.

**Changes**

- Added tokenizer-based validation for custom property values.
- Rejects malformed strings, URLs, comments, unmatched blocks, and
trailing backslashes.
- Preserves raw custom property declaration values before `css-tree` can
repair/normalize them.
- Prevents custom property value editing from coercing invalid input
through fallback parsing like `kebabCase()` or color recovery.
- Added regression tests for advanced panel input and CSS data parsing.

**Verification**

- `pnpm --filter @webstudio-is/css-data test -- parse-css-value.test.ts
parse-css.test.ts`
- `pnpm --filter @webstudio-is/builder test --
parse-intermediate-or-invalid-value.test.ts parse-style-input.test.ts`

2026-06-01 17:03:54 +02:00

__generated__

fix: Tailwind border color arbitrary var (#5717 )

2026-04-23 17:18:29 +02:00

property-parsers

fix: preserve CSS variable and gradient references on paste (#5716 )

2026-04-23 13:22:33 +02:00

custom-data.ts

feat: CSS Grid UI (#5614 )

2026-03-08 10:52:21 +01:00

html-elements.ts

feat: Add tooltip when transforms are unavailable (#5778 )