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build(deps): bump tailwindcss from 3.4.19 to 4.3.3 in /client - #2255

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build(deps): bump tailwindcss from 3.4.19 to 4.3.3 in /client #2255
dependabot[bot] wants to merge 1 commit into
main from
dependabot/npm_and_yarn/client/tailwindcss-4.3.3

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@dependabot dependabot Bot commented on behalf of github Aug 31, 2026 •
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Bumps tailwindcss from 3.4.19 to 4.3.3.

Release notes

Sourced from tailwindcss's releases.

v4.3.3

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)

v4.3.2

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)

v4.3.1

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)

... (truncated)

Changelog

Sourced from tailwindcss's changelog.

[4.3.3] - 2026年07月16日

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] - 2026年06月26日

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] - 2026年06月12日

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)

... (truncated)

Commits
Maintainer changes

This version was pushed to npm by GitHub Actions, a new releaser for tailwindcss since your current version.

@dependabot dependabot Bot added dependencies Pull requests that update a dependency file javascript Pull requests that update javascript code labels Aug 31, 2026
Comment thread client/package.json
"react-router-dom": "^7.18.2",
"svg-pan-zoom": "^3.6.2",
"tailwindcss": "^3.3.2",
"tailwindcss": "^4.3.3",

@claude claude Bot Aug 31, 2026

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🔴 tailwindcss is bumped from ^3.3.2 to ^4.3.3 (a breaking rewrite of Tailwind's build pipeline) without migrating client/postcss.config.js or the CSS entry, so npm run dev/npm run prod:build will fail to compile styles after this merges, whereas the base branch builds fine. Tailwind v4 removes direct PostCSS plugin support for tailwindcss itself and requires @ tailwindcss/postcss; the CSS must also switch from @ tailwind base/components/utilities to @ import "tailwindcss". ...

Extended reasoning...

...Fix: either pin back to ^3.4.x or fully migrate: add @ tailwindcss/postcss as a devDependency, update client/postcss.config.js to use it instead of tailwindcss: {}, and replace the @ tailwind directives in the CSS entry with @ import "tailwindcss"; also review client/tailwind.config.js for v4 config compatibility.

client/postcss.config.js (unchanged) still registers tailwindcss: {} directly as a PostCSS plugin (line: tailwindcss: {} in plugins). Starting with Tailwind v4, the tailwindcss package's PostCSS plugin has been split out into @ tailwindcss/postcss; the classic tailwindcss package no longer functions as a PostCSS plugin, and using it that way throws an explicit error at build time telling the user to install @ tailwindcss/postcss. Additionally client's CSS entry (containing @ tailwind base; @ tailwind components; @ tailwind utilities;) is v3 syntax that v4's engine does not process the same way, and client/tailwind.config.js (CommonJS/JS config with content/darkMode keys) is not automatically picked up by v4's CSS-first config model...

Verification: normal. client/package.json:46 bumps "tailwindcss": "^3.3.2" to "^4.3.3", a major upgrade, while the build config is unmigrated. client/postcss.config.js still registers the classic PostCSS plugin directly: plugins: { tailwindcss: {}, autoprefixer: {} }. In Tailwind v4 the PostCSS plugin was split into the separate @ tailwindcss/postcss package; using tailwindcss directly as a...

 

Bumps [tailwindcss](https://github.com/tailwindlabs/tailwindcss/tree/HEAD/packages/tailwindcss) from 3.4.19 to 4.3.3.
- [Release notes](https://github.com/tailwindlabs/tailwindcss/releases)
- [Changelog](https://github.com/tailwindlabs/tailwindcss/blob/main/CHANGELOG.md)
- [Commits](https://github.com/tailwindlabs/tailwindcss/commits/v4.3.3/packages/tailwindcss)
---
updated-dependencies:
- dependency-name: tailwindcss
 dependency-version: 4.3.3
 dependency-type: direct:production
 update-type: version-update:semver-major
...
Signed-off-by: dependabot[bot] <support@github.com>
dependabot Bot force-pushed the dependabot/npm_and_yarn/client/tailwindcss-4.3.3 branch from c8193a6 to 559cbe5 Compare September 1, 2026 15:44
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