Added

• Upgrade: Migrate bare values to named values (#18000)
• Upgrade: Added cache to improve template migration performance (#18025)

Fixed

• Allow _ before numbers during candidate extraction (#17961)
• Prevent duplicate suggestions when using @theme and @utility together (#17675)
• Ensure that media queries within ::before and ::after pseudo selectors create valid CSS rules in production builds (#17979)
• Ensure that the standalone CLI does not leave temporary files behind (#17981)
• Ensure -rotate-* utilities properly negate arbitrary values (#18014)
• Ignore custom variants using :merge(…) selectors in legacy JS plugins (#18020)
• Ensure classes containing . are properly extracted from Clojure files (#18038)
• Upgrade: Fix error when using @import … source(…) (#17963)
• Upgrade: Change casing of utilities with named values to kebab-case to match updated theme variables (#18017)
• Upgrade: Don't migrate strings that match utility names in Vue attribute bindings other than class (#18025)

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)

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)

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)
• Ensure folders with binary file extensions in their names are scanned for utilities (#17595)
• Upgrade: Convert fontSize array tuple syntax to CSS theme variables (#17630)

Fixed

• Show warning when using unsupported bare value data type in --value(…) (#17464)
• PostCSS: Ensure changes to the input CSS file don't generate stale output when using Turbopack (#17554)
• Ensure classes are detected in Ruby's %w syntax in Slim templates (#17557)

Fixed

• Don't rely on the presence of @layer base to polyfill @property (#17506)
• Support setting multiple inset shadows as arbitrary values (#17523)
• Fix drop-shadow-* utilities that are defined with multiple shadows (#17515)
• PostCSS: Fix race condition when two changes are queued concurrently (#17514)
• PostCSS: Ensure files containing @tailwind utilities are processed (#17514)
• Ensure the color-mix(…) polyfill creates fallbacks even when using colors that cannot be statically analyzed (#17513)
• Fix slow incremental builds with @tailwindcss/vite and @tailwindcss/postscss (especially on Windows) (#17511)
• Vite: Fix missing CSS file in Qwik setups (#17533)

Fixed

• Disable padding in @source inline(…) brace expansion (#17491)
• Inject polyfills after @import and body-less @layer (#17493)
• Ensure @tailwindcss/cli does not contain an import for jiti (#17502)

Added

• Add details-content variant (#15319)
• Add inverted-colors variant (#11693)
• Add noscript variant (#11929, #17431)
• Add items-baseline-last and self-baseline-last utilities (#13888, #17476)
• Add pointer-none, pointer-coarse, and pointer-fine variants (#16946)
• Add any-pointer-none, any-pointer-coarse, and any-pointer-fine variants (#16941)
• Add safe alignment utilities (#14607)
• Add user-valid and user-invalid variants (#12370)
• Add wrap-anywhere, wrap-break-word, and wrap-normal utilities (#12128)
• Add @source inline(…) and @source not inline(…) (#17147)
• Add @source not "…" (#17255)
• Add text-shadow-* utilities (#17389)
• Add mask-* utilities (#17134)
• Add bg-{position,size}-* utilities for arbitrary values (#17432)
• Add shadow-*/<alpha>, inset-shadow-*/<alpha>, drop-shadow-*/<alpha>, and text-shadow-*/<alpha> utilities to control shadow opacity (#17398, #17434)
• Add drop-shadow-<color> utilities (#17434)
• Improve compatibility with older versions of Safari and Firefox (#17435)

Fixed

• Follow symlinks when resolving @source directives (#17391)
• Don't scan ignored files for classes when changing an ignored file triggers a rebuild using @tailwindcss/cli (#17255)
• Support negated content rules in legacy JavaScript configuration (#17255)
• Interpret syntax like @("@")md:… as @md:… in Razor files (#17427)
• Disallow top-level braces, top-level semicolons, and unbalanced parentheses and brackets in arbitrary values (#17361)
• Ensure the --theme(…) function still resolves to the CSS variables when using legacy JS plugins (#17458)
• Detect used theme variables in CSS module files (#17433, #17467)

Changed

• Ignore node_modules by default (can be overridden by @source … rules) (#17255)
• @source rules that include file extensions or point inside node_modules/ folders no longer consider your .gitignore rules (#17255)
• Deprecate bg-{left,right}-{top,bottom} in favor of bg-{top,bottom}-{left,right} utilities (#17378)
• Deprecate object-{left,right}-{top,bottom} in favor of object-{top,bottom}-{left,right} utilities (#17437)

Fixed

• Fix an issue causing the CLI to hang when processing Ruby files (#17383)

Added

• Add support for literal values in --value('…') and --modifier('…') (#17304)

Fixed

• Fix class extraction followed by ( in Pug (#17320)
• Ensure @keyframes for theme animations are emitted if they are referenced following a comma (#17352)
• Vite: Ensure that updates to an imported CSS file are properly propagated after updating source files (#17347)
• Pre process Slim templates embedded in Ruby files (#17336)
• Error when input and output files resolve to the same file when using the CLI (#17311)
• Add missing suggestions when --spacing(--value(integer, number)) is used (#17308)
• Add ::-webkit-details-marker pseudo to marker variant (#17362)