⬆️ update Tailwind CSS to v4.3.3

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@tailwindcss/vite (source)	4.1.18 → 4.3.3
tailwindcss (source)	4.1.18 → 4.3.3

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Release Notes

tailwindlabs/tailwindcss (@​tailwindcss/vite)

v4.3.3

Compare Source

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)

v4.3.2

Compare Source

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)

v4.3.1

Compare Source

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)

v4.3.0

Compare Source

Added

• Add @container-size utility (#​18901)
• Add scrollbar-{auto,thin,none} utilities for scrollbar-width, and scrollbar-thumb-* / scrollbar-track-* color utilities for scrollbar-color (#​19981, #​20019)
• Add scrollbar-gutter-* utilities (#​20018)
• Add zoom-* utilities (#​20020)
• Add tab-* utilities (#​20022)
• Allow using @variant with stacked variants (e.g. @variant hover:focus { … }) (#​19996)
• Allow using @variant with compound variants (e.g. @variant hover, focus { … }) (#​19996)
• Support --default(…) in --value(…) and --modifier(…) for functional @utility definitions (#​19989)

Fixed

• Ensure @plugin resolves package JavaScript entries instead of browser CSS entries when using @tailwindcss/vite (#​19949)
• Fix relative @import and @plugin paths resolving from the wrong directory when using @tailwindcss/vite (#​19965)
• Ensure CSS files containing @variant are processed by @tailwindcss/vite (#​19966)
• Resolve imports relative to base when result.opts.from is not provided when using @tailwindcss/postcss (#​19980)
• Canonicalization: preserve significant _ whitespace in arbitrary values (#​19986)
• Canonicalization: add parentheses when removing whitespace from arbitrary values would hurt readability (e.g. w-[calc(100%---spacing(60))] → w-[calc(100%-(--spacing(60)))]) (#​19986)
• Canonicalization: preserve the original unit in arbitrary values instead of normalizing to base units (e.g. -mt-[20in] → mt-[-20in], not mt-[-1920px]) (#​19988)
• Canonicalization: migrate arbitrary :has() variants from [&:has(…)] to has-[…] (#​19991)
• Upgrade: don’t migrate inline style attributes (e.g. style="flex-grow: 1" → style="flex-grow: 1", not style="grow: 1") (#​19918)
• Allow multiple @utility definitions with the same name but different value types (#​19777)
• Export missing PluginWithConfig type from tailwindcss/plugin to fix errors when inferring plugin config types (#​19707)
• Ensure start and end legacy utilities without values do not generate CSS (#​20003)
• Ensure --value(…) is required in functional @utility definitions (#​20005)
• Canonicalization: preserve required whitespace around operators in negated arbitrary values (e.g. -left-[(var(--a)+var(--b))]) (#​20011)

v4.2.4

Compare Source

Fixed

• Ensure imports in @import and @plugin still resolve correctly when using Vite aliases in @tailwindcss/vite (#​19947)

v4.2.3

Compare Source

Fixed

• Canonicalization: improve canonicalizations for tracking-* utilities by preferring non-negative utilities (e.g. -tracking-tighter → tracking-wider) (#​19827)
• Fix crash due to invalid characters in candidate (exceeding valid unicode code point range) (#​19829)
• Ensure query params in imports are considered unique resources when using @tailwindcss/webpack (#​19723)
• Canonicalization: collapse arbitrary values into shorthand utilities (e.g. px-[1.2rem] py-[1.2rem] → p-[1.2rem]) (#​19837)
• Canonicalization: collapse border-{t,b}-* into border-y-*, border-{l,r}-* into border-x-*, and border-{t,r,b,l}-* into border-* (#​19842)
• Canonicalization: collapse scroll-m{t,b}-* into scroll-my-*, scroll-m{l,r}-* into scroll-mx-*, and scroll-m{t,r,b,l}-* into scroll-m-* (#​19842)
• Canonicalization: collapse scroll-p{t,b}-* into scroll-py-*, scroll-p{l,r}-* into scroll-px-*, and scroll-p{t,r,b,l}-* into scroll-p-* (#​19842)
• Canonicalization: collapse overflow-{x,y}-* into overflow-* (#​19842)
• Canonicalization: collapse overscroll-{x,y}-* into overscroll-* (#​19842)
• Read from --placeholder-color instead of --background-color for placeholder-* utilities (#​19843)
• Upgrade: ensure files are not emptied out when killing the upgrade process while it's running (#​19846)
• Upgrade: use config.content when migrating from Tailwind CSS v3 to Tailwind CSS v4 (#​19846)
• Upgrade: never migrate files that are ignored by git (#​19846)
• Add .env and .env.* to default ignored content files (#​19846)
• Canonicalization: migrate overflow-ellipsis into text-ellipsis (#​19849)
• Canonicalization: migrate start-full → inset-s-full, start-auto → inset-s-auto, start-px → inset-s-px, and start-<number> → inset-s-<number> as well as negative versions (#​19849)
• Canonicalization: migrate end-full → inset-e-full, end-auto → inset-e-auto, end-px → inset-e-px, and end-<number> → inset-e-<number> as well as negative versions (#​19849)
• Canonicalization: move the - sign inside the arbitrary value -left-[9rem] → left-[-9rem] (#​19858)
• Canonicalization: move the - sign outside the arbitrary value ml-[calc(-1*var(--width))] → -ml-(--width) (#​19858)
• Improve performance when scanning JSONL / NDJSON files (#​19862)
• Support NODE_PATH environment variable in standalone CLI (#​19617)

v4.2.2

Compare Source

Fixed

• Don't crash when candidates contain prototype properties like row-constructor (#​19725)
• Canonicalize calc(var(--spacing)*…) expressions into --spacing(…) (#​19769)
• Fix crash in canonicalization step when handling utilities containing @property at-rules (e.g. shadow-sm border) (#​19727)
• Skip full reload for server only modules scanned by client CSS when using @tailwindcss/vite (#​19745)
• Add support for Vite 8 in @tailwindcss/vite (#​19790)
• Improve canonicalization for bare values exceeding default spacing scale suggestions (e.g. w-1234 h-1234 → size-1234) (#​19809)
• Fix canonicalization resulting in empty list (e.g. w-5 h-5 size-5 → '' instead of size-5) (#​19812)

v4.2.1

Compare Source

Fixed

• Allow trailing dash in functional utility names for backwards compatibility (#​19696)
• Properly detect classes containing . characters within curly braces in MDX files (#​19711)

v4.2.0

Compare Source

Added

• Add mauve, olive, mist, and taupe color palettes to the default theme (#​19627)
• Add @tailwindcss/webpack package to run Tailwind CSS as a webpack plugin (#​19610)
• Add pbs-* and pbe-* utilities for padding-block-start and padding-block-end (#​19601)
• Add mbs-* and mbe-* utilities for margin-block-start and margin-block-end (#​19601)
• Add scroll-pbs-* and scroll-pbe-* utilities for scroll-padding-block-start and scroll-padding-block-end (#​19601)
• Add scroll-mbs-* and scroll-mbe-* utilities for scroll-margin-block-start and scroll-margin-block-end (#​19601)
• Add border-bs-* and border-be-* utilities for border-block-start and border-block-end (#​19601)
• Add inline-*, min-inline-*, max-inline-* utilities for inline-size, min-inline-size, and max-inline-size (#​19612)
• Add block-*, min-block-*, max-block-* utilities for block-size, min-block-size, and max-block-size (#​19612)
• Add inset-s-*, inset-e-*, inset-bs-*, inset-be-* utilities for inset-inline-start, inset-inline-end, inset-block-start, and inset-block-end (#​19613)
• Add font-features-* utility for font-feature-settings (#​19623)

Fixed

• Prevent double @supports wrapper for color-mix values (#​19450)
• Allow whitespace around @source inline() argument (#​19461)
• Emit comment when source maps are saved to files when using @tailwindcss/cli (#​19447)
• Detect utilities containing capital letters followed by numbers (#​19465)
• Fix class extraction for Rails' strict locals (#​19525)
• Align @utility name validation with Oxide scanner rules (#​19524)
• Fix infinite loop when using @variant inside @custom-variant (#​19633)
• Allow multiples of .25 in aspect-* fractions (e.g. aspect-8.5/11) (#​19688)
• Ensure changes to external files listed via @source trigger a full page reload when using @tailwindcss/vite (#​19670)
• Improve performance of Oxide scanner in bigger projects by reducing file system walks (#​19632)
• Ensure import aliases in Astro v5 work without crashing when using @tailwindcss/vite (#​19677)
• Allow escape characters in @utility names to improve support with formatters such as Biome (#​19626)
• Fix incorrect canonicalization results when canonicalizing multiple times (#​19675)
• Add .jj to default ignored content directories (#​19687)

Deprecated

• Deprecate start-* and end-* utilities in favor of inset-s-* and inset-e-* utilities (#​19613)

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📝 Walkthrough

Walkthrough

Tailwind CSS build tooling dependencies are updated in the web package: @tailwindcss/vite and tailwindcss are both bumped from version 4.1.18 to 4.3.1. No other configuration, scripts, or dependencies are affected.

Changes

Tailwind Tooling Upgrade

Layer / File(s)	Summary
Tailwind version bump packages/web/package.json	@tailwindcss/vite and tailwindcss dev dependencies updated from 4.1.18 to 4.3.1.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly identifies the Tailwind CSS dependency update, although its stated target version does not match the changeset.

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