# tailwind-merge changelog > Merges Tailwind CSS classes, resolving conflicts in favour of the last one. - Vendor: Dany Castillo - Category: Frameworks & Libraries - Official site: https://github.com/dcastil/tailwind-merge - Tracked by: What's New (https://whatsnew.fyi/product/tailwind-merge) - Harvested from: GitHub (dcastil/tailwind-merge) - Entries below: 10 (newest first) What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog. Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'. ## Releases ### v3.6.0 - Date: 2026-05-10 - Version: v3.6.0 - Original notes: https://github.com/dcastil/tailwind-merge/releases/tag/v3.6.0 - Permalink: https://whatsnew.fyi/product/tailwind-merge/releases/v3.6.0 - **added** — Add support for Tailwind CSS v4.3 - **added** — Add postfixLookupClassGroups option to config to support Tailwind utilities where a slash is part of the full class name, like named container queries - **added** — Add support for readonly array values - **fixed** — Fix broken links in README - **security** — Harden internal CI pipeline security by omitting git checkout ###### New Features - Add support for Tailwind CSS v4.3 by @dcastil in https://github.com/dcastil/tailwind-merge/pull/677 - Add `postfixLookupClassGroups` option to config to support Tailwind utilities where a slash is part of the full class name, like named container queries - Add support for readonly array values by @unional in https://github.com/dcastil/tailwind-merge/pull/652 ###### Documentation - Fix broken links in README by @maurer2 in https://github.com/dcastil/tailwind-merge/pull/662 ###### Other - Harden internal CI pipeline security by omitting git checkout by @dcastil, suggested by @kyletaylored in https://github.com/dcastil/tailwind-merge/commit/6b2499c10cf52bed42426d30b4219e90374b30d6 **Full Changelog**: https://github.com/dcastil/tailwind-merge/compare/v3.5.0...v3.6.0 Thanks to @brandonmcconnell, @manavm1990, @langy, @roboflow, @syntaxfm, @getsentry, @codecov, a private sponsor, @block, @openclaw, @sourcegraph, @mike-healy and more via @thnxdev for sponsoring tailwind-merge! ❤️ ### v3.5.0 - Date: 2026-02-18 - Version: v3.5.0 - Original notes: https://github.com/dcastil/tailwind-merge/releases/tag/v3.5.0 - Permalink: https://whatsnew.fyi/product/tailwind-merge/releases/v3.5.0 ###### New Features - Add support for Tailwind CSS v4.2 by @dcastil in https://github.com/dcastil/tailwind-merge/pull/651 **Full Changelog**: https://github.com/dcastil/tailwind-merge/compare/v3.4.1...v3.5.0 Thanks to @brandonmcconnell, @manavm1990, @langy, @roboflow, @syntaxfm, @getsentry, @codecov, a private sponsor, @block, @openclaw, @sourcegraph and more via @thnxdev for sponsoring tailwind-merge! ❤️ ### v3.4.1 - Date: 2026-02-15 - Version: v3.4.1 - Original notes: https://github.com/dcastil/tailwind-merge/releases/tag/v3.4.1 - Permalink: https://whatsnew.fyi/product/tailwind-merge/releases/v3.4.1 ###### Bug Fixes - Prevent arbitrary font-family and font-weight from merging by @roneymoon in https://github.com/dcastil/tailwind-merge/pull/635 **Full Changelog**: https://github.com/dcastil/tailwind-merge/compare/v3.4.0...v3.4.1 Thanks to @brandonmcconnell, @manavm1990, @langy, @roboflow, @syntaxfm, @getsentry, @codecov, a private sponsor, @block, @openclaw, @sourcegraph and more via @thnxdev for sponsoring tailwind-merge! ❤️ ### v2.6.1 - Date: 2026-01-30 - Version: v2.6.1 - Original notes: https://github.com/dcastil/tailwind-merge/releases/tag/v2.6.1 - Permalink: https://whatsnew.fyi/product/tailwind-merge/releases/v2.6.1 ###### Bug Fixes - Fix arbitrary value using `color-mix` not being detected as color by @dcastil in #591 - This fix was backported from v3.3.1 to make it available for v2 users. **Full Changelog**: https://github.com/dcastil/tailwind-merge/compare/v2.6.0...v2.6.1 Thanks to @brandonmcconnell, @manavm1990, @langy, @roboflow, @syntaxfm, @getsentry, @codecov, a private sponsor, @block, @openclaw and more via @thnxdev for sponsoring tailwind-merge! ❤️ ### v3.4.0 - Date: 2025-11-09 - Version: v3.4.0 - Original notes: https://github.com/dcastil/tailwind-merge/releases/tag/v3.4.0 - Permalink: https://whatsnew.fyi/product/tailwind-merge/releases/v3.4.0 ###### New Features - Performance optimizations which make tailwind-merge >10% faster - Vibe optimization by @quantizor in https://github.com/dcastil/tailwind-merge/pull/547 - Additional optimizations by @quantizor in https://github.com/dcastil/tailwind-merge/pull/619 ###### Documentation - Improve docs by clarifying things, adding more examples by @dcastil in https://github.com/dcastil/tailwind-merge/pull/618 - Make examples more realistic by @dcastil in https://github.com/dcastil/tailwind-merge/pull/617 - Add custom variant as an alternative to docs by @kidonng in https://github.com/dcastil/tailwind-merge/pull/592 ###### Other - Improve benchmarking suite by @quantizor in https://github.com/dcastil/tailwind-merge/pull/620 **Full Changelog**: https://github.com/dcastil/tailwind-merge/compare/v3.3.1...v3.4.0 Thanks to @brandonmcconnell, @manavm1990, @langy, @roboflow, @syntaxfm, @getsentry, @codecov and a private sponsor for sponsoring tailwind-merge! ❤️ ### v3.3.1 - Date: 2025-06-10 - Version: v3.3.1 - Original notes: https://github.com/dcastil/tailwind-merge/releases/tag/v3.3.1 - Permalink: https://whatsnew.fyi/product/tailwind-merge/releases/v3.3.1 ###### Bug Fixes - Fix arbitrary value using `color-mix()` not being detected as color by @dcastil in https://github.com/dcastil/tailwind-merge/pull/591 **Full Changelog**: https://github.com/dcastil/tailwind-merge/compare/v3.3.0...v3.3.1 Thanks to @brandonmcconnell, @manavm1990, @langy, @roboflow, @syntaxfm, @getsentry, @codecov, @sourcegraph, a private sponsor, @block and @shawt3000 for sponsoring tailwind-merge! ❤️ ### v3.3.0 - Date: 2025-05-11 - Version: v3.3.0 - Original notes: https://github.com/dcastil/tailwind-merge/releases/tag/v3.3.0 - Permalink: https://whatsnew.fyi/product/tailwind-merge/releases/v3.3.0 ###### New Features - Add support for tailwind CSS v4.1.5 by @dcastil in https://github.com/dcastil/tailwind-merge/pull/575 **Full Changelog**: https://github.com/dcastil/tailwind-merge/compare/v3.2.0...v3.3.0 Thanks to @brandonmcconnell, @manavm1990, @langy, @roboflow, @syntaxfm, @getsentry, @codecov, @sourcegraph, a private sponsor and @block for sponsoring tailwind-merge! ❤️ ### v3.2.0 - Date: 2025-04-06 - Version: v3.2.0 - Original notes: https://github.com/dcastil/tailwind-merge/releases/tag/v3.2.0 - Permalink: https://whatsnew.fyi/product/tailwind-merge/releases/v3.2.0 ###### New Features - Add support for Tailwind CSS v4.1 by @dcastil in https://github.com/dcastil/tailwind-merge/pull/565 **Full Changelog**: https://github.com/dcastil/tailwind-merge/compare/v3.1.0...v3.2.0 Thanks to @brandonmcconnell, @manavm1990, @langy, @jamesreaco, @roboflow, @syntaxfm, @getsentry, @codecov, @sourcegraph and a private sponsor for sponsoring tailwind-merge! ❤️ ### v3.1.0 - Date: 2025-03-31 - Version: v3.1.0 - Original notes: https://github.com/dcastil/tailwind-merge/releases/tag/v3.1.0 - Permalink: https://whatsnew.fyi/product/tailwind-merge/releases/v3.1.0 ###### New Features - Add support for Tailwind CSS v4.0.10 by @dcastil in https://github.com/dcastil/tailwind-merge/pull/546 ###### Bug Fixes - Fix length variable in `via-(length:*)` class being merged with `via-` classes accidentally by @dcastil in https://github.com/dcastil/tailwind-merge/pull/559 ###### Documentation - Fix typo in comment in types.ts by @roottool in https://github.com/dcastil/tailwind-merge/pull/549 - Update shadow scale recipe to tailwind merge v3 API by @dcastil in https://github.com/dcastil/tailwind-merge/pull/545 ###### Other - Fix metrics report action erroring on PRs from forks by @dcastil in https://github.com/dcastil/tailwind-merge/pull/551 **Full Changelog**: https://github.com/dcastil/tailwind-merge/compare/v3.0.2...v3.1.0 Thanks to @brandonmcconnell, @manavm1990, @langy, @jamesreaco, @roboflow, @syntaxfm, @getsentry, @codecov, @sourcegraph and a private sponsor for sponsoring tailwind-merge! ❤️ ### v3.0.2 - Date: 2025-02-22 - Version: v3.0.2 - Original notes: https://github.com/dcastil/tailwind-merge/releases/tag/v3.0.2 - Permalink: https://whatsnew.fyi/product/tailwind-merge/releases/v3.0.2 ###### Bug Fixes - Fix `px` value not being recognized for some class groups by @dcastil in https://github.com/dcastil/tailwind-merge/pull/538 - Fix doc comment being in incorrect place in default config by @gjtorikian in https://github.com/dcastil/tailwind-merge/pull/526 **Full Changelog**: https://github.com/dcastil/tailwind-merge/compare/v3.0.1...v3.0.2 Thanks to @brandonmcconnell, @manavm1990, @langy, @jamesreaco, @roboflow, @syntaxfm, @getsentry, @codecov, @sourcegraph and a private sponsor for sponsoring tailwind-merge! ❤️