Here is everything you need to know about this update. Please take a good look at what changed and the test results before merging this pull request.

What changed?

✳️ @​tailwindcss/postcss (4.3.0 → 4.3.3) · Repo · Changelog

Release Notes

4.3.3

Fixed

• Support --watch --poll[=ms] in @tailwindcss/cli when filesystem events are unreliable or unavailable (#20297)
• Canonicalization: match arbitrary hex colors against theme colors case-insensitively (e.g. bg-[#fff] and bg-[#FFF] → bg-white) (#20298)
• Prevent Preflight from overriding Firefox's native iframe:focus-visible outline styles (#20292)
• Ensure theme('colors.foo') in JS plugins resolves correctly when both --color-foo and --color-foo-bar exist (#20299)
• Ensure fractional opacity modifiers work with named shadow sizes like shadow-sm/12.5, text-shadow-sm/12.5, drop-shadow-sm/12.5, and inset-shadow-sm/12.5 (#20302)
• Parse selectors like [data-foo]div as two selectors instead of one (#20303)
• Ensure @tailwindcss/postcss rebuilds when a preprocessor like Sass changes the input CSS without changing the input file on disk (#20310)
• Ensure CSS nesting is handled even when Lightning CSS isn't run, such as in @tailwindcss/browser and Tailwind Play (#20124)
• Prevent achromatic theme colors from shifting hue when mixed in polar color spaces like oklch (#20314)
• Ensure --spacing(0) is optimized to 0px instead of 0 so it remains a <length> when used in calc(…) (#20319)
• Load @parcel/watcher only when needed in @tailwindcss/cli --watch mode, so one-off builds and --watch --poll work when @parcel/watcher can't be loaded (#20325)
• Use explicit platform fonts instead of system-ui and ui-sans-serif so CJK text respects the page's lang attribute on Windows (#20318)
• Prevent @tailwindcss/upgrade from rewriting ignored files when run from a subdirectory (#20329)
• Ensure earlier @source rules pointing to nested files are scanned when later @source rules point to files in parent folders (#20335)
• Prevent @tailwindcss/vite from triggering full page reloads when scanned files are processed by Vite but haven't been loaded as modules yet (#20336)

4.3.2

Fixed

• Support bare spacing values for auto-rows-* and auto-cols-* utilities (e.g. auto-rows-12 and auto-cols-16) (#20229)
• Prevent @tailwindcss/cli in --watch mode from crashing on Windows when @source points to a directory that doesn't exist (#20242)
• Prevent @tailwindcss/vite from crashing in Deno v2.8.x when context.parentURL is not a valid URL (#20245)
• Ensure @tailwindcss/cli in --watch mode rebuilds when the input CSS file changes in an ignored directory (#20246)
• Allow @variant rules used in addBase(…) to use custom variants defined later (#20247)
• Prevent @tailwindcss/vite from crashing during HMR when scanned files or directories are deleted (#20259)
• Generate font-size instead of color declarations for text-[--spacing(…)] (#20260)
• Prevent @source patterns from scanning unrelated sibling files and folders (#20263)
• Extract class candidates adjacent to Template Toolkit delimiters like %]…[% in .tt, .tt2, and .tx files (#20269)
• Extract class candidates from conditional Maud syntax like p.text-black[condition] (#20269)
• Prevent @position-try rules from triggering unknown at-rule warnings when optimizing CSS (#20277)
• Support class suggestions for named opacity modifiers from --opacity theme values (#20287)
• Prevent type errors in @tailwindcss/postcss when used with newer PostCSS patch releases (#20289)

Does any of this look wrong? Please let us know.

Commits

See the full diff on Github. The new version differs by more commits than we can show here.

✳️ tailwindcss (4.3.0 → 4.3.3) · Repo · Changelog

Release Notes

4.3.3

Fixed

• Support --watch --poll[=ms] in @tailwindcss/cli when filesystem events are unreliable or unavailable (#20297)
• Canonicalization: match arbitrary hex colors against theme colors case-insensitively (e.g. bg-[#fff] and bg-[#FFF] → bg-white) (#20298)
• Prevent Preflight from overriding Firefox's native iframe:focus-visible outline styles (#20292)
• Ensure theme('colors.foo') in JS plugins resolves correctly when both --color-foo and --color-foo-bar exist (#20299)
• Ensure fractional opacity modifiers work with named shadow sizes like shadow-sm/12.5, text-shadow-sm/12.5, drop-shadow-sm/12.5, and inset-shadow-sm/12.5 (#20302)
• Parse selectors like [data-foo]div as two selectors instead of one (#20303)
• Ensure @tailwindcss/postcss rebuilds when a preprocessor like Sass changes the input CSS without changing the input file on disk (#20310)
• Ensure CSS nesting is handled even when Lightning CSS isn't run, such as in @tailwindcss/browser and Tailwind Play (#20124)
• Prevent achromatic theme colors from shifting hue when mixed in polar color spaces like oklch (#20314)
• Ensure --spacing(0) is optimized to 0px instead of 0 so it remains a <length> when used in calc(…) (#20319)
• Load @parcel/watcher only when needed in @tailwindcss/cli --watch mode, so one-off builds and --watch --poll work when @parcel/watcher can't be loaded (#20325)
• Use explicit platform fonts instead of system-ui and ui-sans-serif so CJK text respects the page's lang attribute on Windows (#20318)
• Prevent @tailwindcss/upgrade from rewriting ignored files when run from a subdirectory (#20329)
• Ensure earlier @source rules pointing to nested files are scanned when later @source rules point to files in parent folders (#20335)
• Prevent @tailwindcss/vite from triggering full page reloads when scanned files are processed by Vite but haven't been loaded as modules yet (#20336)

4.3.2

Fixed

• Support bare spacing values for auto-rows-* and auto-cols-* utilities (e.g. auto-rows-12 and auto-cols-16) (#20229)
• Prevent @tailwindcss/cli in --watch mode from crashing on Windows when @source points to a directory that doesn't exist (#20242)
• Prevent @tailwindcss/vite from crashing in Deno v2.8.x when context.parentURL is not a valid URL (#20245)
• Ensure @tailwindcss/cli in --watch mode rebuilds when the input CSS file changes in an ignored directory (#20246)
• Allow @variant rules used in addBase(…) to use custom variants defined later (#20247)
• Prevent @tailwindcss/vite from crashing during HMR when scanned files or directories are deleted (#20259)
• Generate font-size instead of color declarations for text-[--spacing(…)] (#20260)
• Prevent @source patterns from scanning unrelated sibling files and folders (#20263)
• Extract class candidates adjacent to Template Toolkit delimiters like %]…[% in .tt, .tt2, and .tx files (#20269)
• Extract class candidates from conditional Maud syntax like p.text-black[condition] (#20269)
• Prevent @position-try rules from triggering unknown at-rule warnings when optimizing CSS (#20277)
• Support class suggestions for named opacity modifiers from --opacity theme values (#20287)
• Prevent type errors in @tailwindcss/postcss when used with newer PostCSS patch releases (#20289)

4.3.1

Added

• Add --silent option to suppress output in @tailwindcss/cli (#20100)

Fixed

• Remove deprecation warnings by using Module#registerHooks instead of Module#register on Node 26+ (#20028)
• Canonicalization: don't crash when plugin utilities throw for unsupported values (#20052)
• Allow @apply to be used with CSS mixins (#19427)
• Ensure not-* correctly negates @container queries, including style(…) queries (#20059)
• Ensure drop-shadow-* color utilities work with custom shadow values containing calc(…) (#20080)
• Fix 'Sourcemap is likely to be incorrect' warnings when using @tailwindcss/vite (#20103)
• Ensure @tailwindcss/webpack can be installed in Rspack projects without requiring webpack as a peer dependency (#20027)
• Canonicalization: don't suggest invalid calc(…) expressions (e.g. px-[calc(1rem+0px)] → px-[calc(1rem+0)]) (#20127)
• Canonicalization: avoid suggesting large spacing-scale values for arbitrary lengths (e.g. left-[99999px] → left-[99999px], not left-24999.75) (#20130)
• Ensure @tailwindcss/cli in --watch mode recovers when a tracked dependency is deleted and restored (#20137)
• Ensure standalone @tailwindcss/cli binaries are ignored when scanning for class candidates (#20139)
• Ensure class candidates are extracted from Twig addClass(…) and removeClass(…) calls (#20198)
• Don't crash in the Ruby or Vue preprocessors when scanning files containing invalid UTF-8 bytes (#19588)
• Allow @variant to be used inside addBase (#19480)
• Ensure @source globs with symlinks are preserved (#20203)
• Ensure later @source rules can re-include files excluded by earlier @source not rules (#20203)
• Upgrade: don't migrate empty class rules to invalid @utility rules (#20205)
• Ensure transitions between inset-shadow-none and other inset shadows work correctly (#20208)
• Ensure explicitly referenced @source directories are scanned even when ignored by git (#20214)
• Ensure @source globs ending in **/* preserve dynamic path segments to avoid scanning too many files (#20217)
• Canonicalization: don't fold calc(…) divisions when the result would require high precision (e.g. w-[calc(100%/3.5)] → w-[calc(100%/3.5)], not w-[28.571428571428573%]) (#20221)
• Serve ESM type declarations to ESM importers of @tailwindcss/postcss (#20228)

Changed

• Generate 0 instead of calc(var(--spacing) * 0) for spacing utilities like m-0 and left-0 (#20196)
• Generate var(--spacing) instead of calc(var(--spacing) * 1) for spacing utilities like m-1 and left-1 (#20196)

Does any of this look wrong? Please let us know.

Commits

See the full diff on Github. The new version differs by more commits than we can show here.

↗️ enhanced-resolve (indirect, 5.21.4 → 5.24.2) · Repo · Changelog

Release Notes

5.24.2

Patch Changes

• Batch cached filesystem callbacks from one synchronous burst into a single tick. (by @alexander-akait in #623)

5.24.1

Patch Changes

• Reduce hot-path allocations in the resolve pipeline. (by @xiaoxiaojx in #615)

5.24.0

Minor Changes

• Allow the context path and request arguments of resolve (and resolveSync/resolvePromise) to accept file: URL instances, converting them to filesystem paths. Plain strings stay literal paths, matching Node's fs. (by @alexander-akait in #607)

Patch Changes

• Make the resolver runtime-agnostic so it works in browsers, Deno and Bun as well as Node. File contents are decoded without assuming a Node Buffer, and browser shims are provided for the path, url and graceful-fs builtins (Node, Deno and Bun keep using the native ones) so the package bundles for the browser — supply your own fileSystem there. (by @alexander-akait in #606)

• Rename the positional resolve/resolveSync/resolvePromise parameters to parent/specifier (from path/request) for ESM-aligned naming and document them in the README. Purely cosmetic — arguments are positional, so there is no behavior or API change. (by @alexander-akait in #611)

5.23.0

Minor Changes

• Allow the path-like resolve options roots, modules, alias/fallback targets, restrictions, and tsconfig (the config file, configFile, baseUrl, and references) to accept file URL instances (such as new URL("./dir/", import.meta.url)), converting them to filesystem paths. Plain strings are still treated as literal paths, matching Node's fs. (by @alexander-akait in #604)

5.22.2

Patch Changes

• Fall back to the next modules entry when a package exports target is filtered out by restrictions, instead of throwing. (by @alexander-akait in #600)

5.22.1

Patch Changes

• Fix restrictions bypass via an in-root symlink pointing outside the root. (by @alexander-akait in #595)

5.22.0

Minor Changes

• CachedInputFileSystem#purge accepts a second { exact?: boolean } argument; exact: true removes only entries whose key matches what exactly instead of any entry whose key starts with what. (by @alexander-akait in #591)

5.21.6

Patch Changes

• Speed up alias resolution on the hot path. (by @alexander-akait in #589)

  • AliasPlugin / TsconfigPathsPlugin: bucket compiled alias options by the first char code of name, so resolves skip options whose name can't possibly match the request's first char. Gated to cases with 2+ distinct first chars so degenerate single-bucket lists (e.g. long alias chains) don't pay for the Map.get.
  • TsconfigPathsPlugin: memoize _selectPathsDataForContext(map, requestPath) per map so the per-source-file contextList scan only runs once per directory. Gated to maps with 2+ contexts so single-context tsconfigs aren't penalized by the cache lookup.

  Biggest wins on alias-heavy configs (300+ entries): huge-alias-miss +151%, huge-alias-list +126%, alias-first-char-miss +120%.

5.21.5

Patch Changes

• Don't add configDir to modules when tsconfig has no baseUrl. (by @alexander-akait in 61f36fd)

Does any of this look wrong? Please let us know.

Commits

See the full diff on Github. The new version differs by 39 commits:

• chore(release): new release (#624)
• chore(deps): bump denoland/setup-deno from 2.0.4 to 2.0.5 in the dependencies group (#625)
• perf: batch cached fs callbacks from one burst into a single tick (#623)
• chore: modernize package metadata URLs (#620)
• chore(deps): bump CodSpeedHQ/action from 4.17.6 to 4.18.1 in the dependencies group (#622)
• chore(release): new release (#619)
• perf: reduce hot-path allocations in resolve pipeline (#615)
• chore(deps-dev): bump tooling from v1.26.3 to v1.26.4 (#617)
• chore(deps-dev): bump the dependencies group with 3 updates (#616)
• chore(deps): bump the dependencies group with 2 updates (#618)
• chore(deps-dev): bump form-data from 4.0.5 to 4.0.6 (#614)
• chore(deps-dev): bump memfs from 4.57.6 to 4.57.7 in the dependencies group (#612)
• chore(deps): bump the dependencies group with 2 updates (#613)
• chore(release): new release (#610)
• test: migrate test suite from jest to the node:test runner (#597)
• feat: make the resolver runtime-agnostic (browser/deno/bun) (#606)
• docs: document resolve() public API and rename params to parent/specifier (#611)
• feat: accept file: URL instances for resolve context and request (#607)
• chore(deps-dev): bump memfs from 4.57.3 to 4.57.6 in the dependencies group (#608)
• chore(deps): bump the dependencies group with 3 updates (#609)
• chore(release): new release (#605)
• feat: accept URLs in options
• chore(deps-dev): bump tooling from `a671b6d` to `a28b891` (#593)
• ci: disable npm cache for Node 10 test leg (#603)
• chore: update deps and fix CI (#602)
• chore(release): new release (#601)
• fix: fall back when an exports target is filtered out by restrictions (#600)
• chore(deps-dev): bump the dependencies group with 4 updates (#598)
• chore(deps): bump CodSpeedHQ/action from 4.15.1 to 4.17.0 in the dependencies group (#599)
• chore(release): new release (#596)
• fix: enforce restrictions on real path of in-root symlinks (#595)
• chore(deps): bump codecov/codecov-action from 6.0.0 to 6.0.1 in the dependencies group (#594)
• chore(release): new release (#592)
• feat: add exact option to CachedInputFileSystem#purge (#591)
• chore(release): new release (#590)
• perf: bucket alias options by first char & sort exports keys by priority (#589)
• chore(release): new release (#588)
• chore: add changelog entry
• fix: don't add configDir to modules when tsconfig has no baseUrl (#587)

🆕 @​emnapi/core (added, 1.11.1)

🆕 @​emnapi/runtime (added, 1.11.1)

🆕 @​emnapi/wasi-threads (added, 1.2.2)

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