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@vanilla-extract/css

What changed in @vanilla-extract/css 1, from its official release notes, upgrade guides and advisories. Sources checked 2026-10-19.

1 performance3 fixes and other

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@vanilla-extract/css 14 changes

Performance 1

  • The index is built only when a stylesheet needs it, speeding up builds of stylesheets that use only plain class selectors.

    1.21.3release notes

Fixes and other changes 3

  • In development mode, dots in debug identifiers derived from source file paths are replaced with underscores, preventing CSS selector escaping and instability. Short identifiers are unaffected.

    1.21.2release notes

  • Added boxOrdinalGroup to the unitless properties list so numeric values are no longer suffixed with px.

    1.21.1release notes

  • Fixed incorrect selector substitution in some style composition cases.

    1.21.1release notes