v1.14.0

New Features

• Improve support for arbitrary values by @dcastil in #263
  • Previously, tailwind-merge checked the content of the arbitrary value portion of a class in most cases to understand whether the type of the arbitrary value is correct (e.g. it checked for number followed by length unit for the length type). That lead to the issue that a class like mt-[calc(theme(fontSize.4xl)/1.125)] would not be recognized correctly because no length unit is present in the arbitrary value.
  • I changed the check of the arbitrary value to also pass when a calc(), min(), max() and clamp() function is used in the arbitrary value.
  • In ambiguous cases, you can use data type labels to mark the type of a class. Read more
  • Moreover, I removed the check where the type of the arbitrary value is unambiguous. In the class mt-[…] the arbitrary value can only be a length, so I don't check for it. A consequence of this is that if you use non-Tailwind classes like mt-[this-is-totally-not-tailwind], tailwind-merge will recognize it as a Tailwind class from now on. Please don't use classes that look like Tailwind classes with arbitrary value but aren't Tailwind classes with tailwind-merge (in default config) to prevent incorrect merging behavior.

Bug Fixes

• Fix col-span-full class missing in default config by @dcastil in #267
• Fix arbitrary value with no present length unit not being recognized by @dcastil in #263

Documentation

• Add missing info about where to call config functions to docs by @dcastil in #264

Full Changelog: v1.13.2...v1.14.0

v1.13.2

Bug Fixes

• Fix TypeScript issue when using moduleResolution: node16 by @LiamMartens in #245

Documentation

• Fix grammar and typos in docs by @jmmarco in #249
• Add tailwind-merge-php to similar packages in docs by @JamesHemery in #246

Full Changelog: v1.13.1...v1.13.2

Thanks to @bluetch for sponsoring tailwind-merge! ❤️

v1.13.1

Bug Fixes

• Fix basis-auto and basis-full not being merged correctly by @lukasz-kapica in #242

Full Changelog: v1.13.0...v1.13.1

v1.13.0

This release focuses on improvements to the docs.

Bug Fixes

• Fix arbitrary length 0 without unit not being recognized by @dcastil in #237
• Fix typo in comment in default-config.ts by @CrutchTheClutch in #227

Documentation

• Add intro video from Simon Vrachliotis to docs by @dcastil in #239
  • @simonswiss made an intro video to tailwind-merge which I added to the docs. Check it out here!
• Add docs about when to use tailwind-merge by @dcastil in #230
  • I added a new page to the docs about when and how to use tailwind-merge which should help you to decide whether you should use it and what alternative approaches exist.
• Make it clearer in docs that tailwind-merge supports composition of class strings by @dcastil in #229

Other

• Add npm package provenance by @dcastil in #219
  • GitHub introduced a new security feature to verify which source commit and build file were used for a specific npm package version. tailwind-merge now publishes provenance signatures alongside all releases on npm. Read more on the GitHub blog.

Full Changelog: v1.12.0...v1.13.0

v1.12.0

With this release tailwind-merge supports all features introduced in Tailwind CSS v3.3.

New Features

• Add support for postfix modifier by @dcastil in #214
  • This adds support for line-height modifiers in font-size utilities like text-lg/7 and more potential postfix modifiers in the future (learn more).
  • All classes are checked for postfix modifiers since there will be more in the future and they'll be configurable with plugins.
  • tailwind-merge can't know from the class syntax alone whether something is a modifier or not. E.g. there is w-1/2 which doesn't contain a modifier. So tailwind-merge always checks whether class without potential modifier exists and if it doesn't it checks for full class. This behavior might get reversed in the next major version as a breaking change (learn more).
  • Added conflictingClassGroupModifiers object to tailwind-merge config (learn more).

Full Changelog: v1.11.0...v1.12.0

v1.11.0

New Features

• Add support for Tailwind CSS v3.3 except line-height shorthand by @dcastil in #210
  • The line-height shorthand in font-size utilities (text-lg/7) introduced in Tailwind CSS v3.3 is not yet supported in tailwind-merge because that feature is a bit more involved. I'll add support for it in a future release. More info in #211.
  • Added new validator isPercent which is needed internally for the default scale of color stop positions.
  • New theme key gradientColorStopPositions supported in tailwind-merge.
  • New logical properties like ps-0 (padding-inline-start: 0px;) are de-duplicated away when using the matching property for all sides afterwards like in this case p-0, but not when using single axis sides like px-0 because padding-inline-start can also be the top or bottom padding depending on writing mode.
    • Basically twMerge('ps-0 p-0') === 'p-0' && twMerge('ps-0 px-0') === 'ps-0 px-0'.
    • If you want to use logical properties and know which writing modes your app is limited to, add the right conflicts yourself to your tailwind-merge config.

Full Changelog: v1.10.0...v1.11.0

Thanks to @brandonmcconnell for sponsoring tailwind-merge! ❤️

v1.10.0

New Features

• Add support for container query length units in arbitrary values by @LesnoyPudge in #204

Full Changelog: v1.9.1...v1.10.0

v1.9.1

Bug Fixes

• Fix arbitrary floats not supported in opacity, scale, etc. by @dcastil in #196
  • Up until now classes like opacity-50 opacity-[.025] weren't merged correctly. You might not have noticed since classes with arbitrary values are defined after the default ones in the output stylesheet, but merging it the other way around (opacity-[.025] opacity-50) would have led to a styling bug.
  • This fix led to a new validator isNumber.
• Fix arbitrary border color value being merged incorrectly by @dcastil in #195

Full Changelog: v1.9.0...v1.9.1

v1.9.0

New Features

• Support decimals in T-shirt sizes by @farreldarian in #189

Documentation

• Fixes typo in recipes docs by @nicklemmon in #181

Other

• Added test case by @chuanyu0201 in #186

Full Changelog: v1.8.1...v1.9.0

v1.8.1

Bug Fixes

• Fix incorrect class group conflicts in grid-related classes by @dcastil in #177

Full Changelog: v1.8.0...v1.8.1

Thanks to @aniravi24 for sponsoring tailwind-merge! ❤️