Tailwind CSS v4.1.12 — Release Notes & Engineering Impact

Source available — automated, not human-reviewed

Component: tailwind · Channel: stable. Automated analysis, not a compatibility certification. How this works.

Analysis updated: 2026-11-01.

Compatibility not verified — check source notes

$ npm install --save-exact [email protected]

📄 .MD

🔧 Bug Fixes 6

⚡ Executive Summary (TL;DR)

Tailwind CSS v4.1.12. Source highlight: Don't consider the global important state in `@apply` (#18404)

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Who Does This Impact? (Role-Based Analysis)

💻 Software Engineers & Devs

Check the source notes against the package and APIs you use before upgrading.

📊 Product & Engineering Leads

Use the documented changes to assess relevance to your product; release frequency alone is not a quality measure.

⚙️ DevOps & Security

Verify the target version, runtime requirements and rollback procedure in the official documentation.

🔧 Bug Fixes & Patches (6)

Don't consider the global important state in `@apply` (#18404)
Add missing suggestions for `flex-<number>` utilities (#18642)
Fix trailing `)` from interfering with extraction in Clojure keywords (#18345)
Detect classes inside Elixir charlist, word list, and string sigils (#18432)
Track source locations through `@plugin` and `@config` (#18345)
Allow boolean values of `process.env.DEBUG` in `@tailwindcss/node` (#18485)

📄 View Raw Release Notes (Original Developer Log)

### Fixed - Don't consider the global important state in `@apply` ([#18404](https://github.com/tailwindlabs/tailwindcss/pull/18404)) - Add missing suggestions for `flex-<number>` utilities ([#18642](https://github.com/tailwindlabs/tailwindcss/pull/18642)) - Fix trailing `)` from interfering with extraction in Clojure keywords ([#18345](https://github.com/tailwindlabs/tailwindcss/pull/18345)) - Detect classes inside Elixir charlist, word list, and string sigils ([#18432](https://github.com/tailwindlabs/tailwindcss/pull/18432)) - Track source locations through `@plugin` and `@config` ([#18345](https://github.com/tailwindlabs/tailwindcss/pull/18345)) - Allow boolean values of `process.env.DEBUG` in `@tailwindcss/node` ([#18485](https://github.com/tailwindlabs/tailwindcss/pull/18485)) - Ignore consecutive semicolons in the CSS parser ([#18532](https://github.com/tailwindlabs/tailwindcss/pull/18532)) - Center the dropdown icon added to an input with a paired datalist by default ([#18511](https://github.com/tailwindlabs/tailwindcss/pull/18511)) - Extract candidates in Slang templates ([#18565](https://github.com/tailwindlabs/tailwindcss/pull/18565)) - Improve error messages when encountering invalid functional utility names ([#18568](https://github.com/tailwindlabs/tailwindcss/pull/18568)) - Discard CSS AST objects with `false` or `undefined` properties ([#18571](https://github.com/tailwindlabs/tailwindcss/pull/18571)) - Allow users to disable URL rebasing in `@tailwindcss/postcss` via `transformAssetUrls: false` ([#18321](https://github.com/tailwindlabs/tailwindcss/pull/18321)) - Fix false-positive migrations in `addEventListener` and JavaScript variable names ([#18718](https://github.com/tailwindlabs/tailwindcss/pull/18718)) - Fix Standalone CLI showing default Bun help when run via symlink on Windows ([#18723](https://github.com/tailwindlabs/tailwindcss/pull/18723)) - Read from `--border-color-*` theme keys in `divide-*` utilities for backwards compatibility ([#18704](https://github.com/tailwindlabs/tailwindcss/pull/18704/)) - Don't scan `.hdr` and `.exr` files for classes by default ([#18734](https://github.com/tailwindlabs/tailwindcss/pull/18734))

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