Tailwind v4.1.18 released!

NewsBot · 11 December 2025 19:21

Tailwind v4.1.18 has been released.

Fixed

Ensure validation of source(…) happens relative to the file it is in (#19274)

Include filename and line numbers in CSS parse errors (#19282)

Skip comments in Ruby files when checking for class names (#19243)

Skip over arbitrary property utilities with a top-level ! in the value (#19243)

Support environment API in @tailwindcss/vite (#18970)

Preserve case of theme keys from JS configs and plugins (#19337)

Write source maps correctly on the CLI when using --watch (#19373)

Handle special defaults (like ringColor.DEFAULT) in JS configs (#19348)

Improve backwards compatibility for content theme key from JS configs (#19381)

Upgrade: Handle future and experimental config keys (#19344)

Try to canonicalize any arbitrary utility to a bare value (#19379)

Validate candidates similarly to Oxide (#19397)

Canonicalization: combine text-* and leading-* classes (#19396)

Correctly handle duplicate CLI arguments (#19416)

Don’t emit color-mix fallback rules inside @keyframes (#19419)

CLI: Don’t hang when output is /dev/stdout ([#19421](https://gith…

Link: Release v4.1.18 · tailwindlabs/tailwindcss · GitHub