Sourced from tailwindcss's releases.

v4.1.6

Added

• Upgrade: Automatically convert arbitrary values to named values when possible (e.g. h-[1lh] to h-lh) (#17831, #17854)
• Upgrade: Update dependencies in parallel for improved performance (#17898)
• Add detailed logging about @source directives, discovered files and scanned files when using DEBUG=* (#17906, #17952)
• Add support for generating source maps in development (#17775)

Fixed

• Ensure negative arbitrary scale values generate negative values (#17831)
• Fix HAML extraction with embedded Ruby (#17846)
• Don't scan files for utilities when using @reference (#17836)
• Fix incorrectly replacing _ with in arbitrary modifier shorthand bg-red-500/(--my_opacity) (#17889)
• Don't scan .log files for classes by default (#17906)
• Ensure that custom utilities applying other custom utilities don't swallow nested @apply rules (#17925)
• Download platform specific package if optionalDependencies are skipped (#17929)

v4.1.5

Added

• Support using @tailwindcss/upgrade to upgrade between versions of v4.* (#17717)
• Add h-lh / min-h-lh / max-h-lh utilities (#17790)
• Transition display, visibility, content-visibility, overlay, and pointer-events when using transition to simplify @starting-style usage (#17812)

Fixed

• Don't scan .geojson or .db files for classes by default (#17700, #17711)
• Hide default shadow suggestions when missing default shadow theme keys (#17743)
• Replace _ with . in theme suggestions for @utility if surrounded by digits (#17733)
• Skip color-mix(…) when opacity is 100% (#17815)
• PostCSS: Ensure that errors in imported stylesheets are recoverable (#17754)
• Upgrade: Bump all Tailwind CSS related dependencies during upgrade (#17763)
• Upgrade: Don't add - to variants starting with @ (#17814)
• Upgrade: Don't format stylesheets that didn't change when upgrading (#17824)

v4.1.4

Added

• Add experimental @tailwindcss/oxide-wasm32-wasi target for running Tailwind in browser environments like StackBlitz (#17558)

Fixed

• Ensure color-mix(…) polyfills do not cause used CSS variables to be removed (#17555)
• Ensure color-mix(…) polyfills create fallbacks for theme variables that reference other theme variables (#17562)
• Fix brace expansion in declining ranges like {10..0..5} and {0..10..-5} (#17591)
• Work around a Chrome rendering bug when using the skew-* utilities (#17627)
• Ensure container query variant names can contain hyphens (#17628)
• Ensure shadow-inherit, inset-shadow-inherit, drop-shadow-inherit, and text-shadow-inherit inherit the shadow color (#17647)
• Ensure compatibility with array tuples used in fontSize JS theme keys (#17630)

... (truncated)

Sourced from tailwindcss's changelog.

[4.1.6] - 2025-05-09

Added

• Upgrade: Automatically convert arbitrary values to named values when possible (e.g. h-[1lh] to h-lh) (#17831, #17854)
• Upgrade: Update dependencies in parallel for improved performance (#17898)
• Add detailed logging about @source directives, discovered files and scanned files when using DEBUG=* (#17906, #17952)
• Add support for generating source maps in development (#17775)

Fixed

• Ensure negative arbitrary scale values generate negative values (#17831)
• Fix HAML extraction with embedded Ruby (#17846)
• Don't scan files for utilities when using @reference (#17836)
• Fix incorrectly replacing _ with in arbitrary modifier shorthand bg-red-500/(--my_opacity) (#17889)
• Don't scan .log files for classes by default (#17906)
• Ensure that custom utilities applying other custom utilities don't swallow nested @apply rules (#17925)
• Download platform specific package if optionalDependencies are skipped (#17929)

[4.1.5] - 2025-04-30

Added

• Support using @tailwindcss/upgrade to upgrade between versions of v4.* (#17717)
• Add h-lh / min-h-lh / max-h-lh utilities (#17790)
• Transition display, visibility, content-visibility, overlay, and pointer-events when using transition to simplify @starting-style usage (#17812)

Fixed

• Don't scan .geojson or .db files for classes by default (#17700, #17711)
• Hide default shadow suggestions when missing default shadow theme keys (#17743)
• Replace _ with . in theme suggestions for @utility if surrounded by digits (#17733)
• Skip color-mix(…) when opacity is 100% (#17815)
• PostCSS: Ensure that errors in imported stylesheets are recoverable (#17754)
• Upgrade: Bump all Tailwind CSS related dependencies during upgrade (#17763)
• Upgrade: Don't add - to variants starting with @ (#17814)
• Upgrade: Don't format stylesheets that didn't change when upgrading (#17824)

Changed

• Ignore .hg, .svn, .venv, venv, .yarn, .next, .turbo, .parcel-cache, __pycache__, and .svelte-kit folders by default (can be overridden by @source … rules) (#17892)
• @source rules that point inside .hg, .svn, .venv, venv, .yarn, .next, .turbo, .parcel-cache, __pycache__, and .svelte-kit folders no longer consider your .gitignore rules (#17892)

[4.1.4] - 2025-04-14

Added

• Add experimental @tailwindcss/oxide-wasm32-wasi target for running Tailwind in browser environments like StackBlitz (#17558)

Fixed

... (truncated)

• 2d13998 Prepare v4.1.6 release (#17951)
• 56b22bb Add support for source maps (#17775)
• 17ca56d Fix bug with nested @​apply rules in utility classes (#17924) (#17925)
• 4f8539c Fix bug replacing modifier variable shorthand syntax underscores (#17889)
• 6a1df6a Ignore @tailwind utilities inside @reference (#17836)
• 4e42756 Design system driven upgrade migrations (#17831)
• 45cd32e Prepare v4.1.5 release (#17830)
• a636933 Add discrete properties to the default list of transition properties (#17812)
• d2daf59 Skip color-mix(…) when opacity is 100% (#17815)
• ba10379 Add h-lh/min-h-lh/max-h-lh utilities to match an elements line height (...
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