# tailwind-merge v3.6.0

- Product: tailwind-merge (https://whatsnew.fyi/product/tailwind-merge)
- Vendor: Dany Castillo
- 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

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'.

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- **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! ❤️