chore(deps-dev): bump tailwindcss from 3.4.19 to 4.1.18 #61

dependabot · 2026-01-15T01:19:25Z

Bumps tailwindcss from 3.4.19 to 4.1.18.

Release notes

v4.1.18

Fixed

Ensure validation of source(…) happens relative to the file it is in (#19274)

Include filename and line numbers in CSS parse errors (#19282)

Skip comments in Ruby files when checking for class names (#19243)

Skip over arbitrary property utilities with a top-level ! in the value (#19243)

Support environment API in @tailwindcss/vite (#18970)

Preserve case of theme keys from JS configs and plugins (#19337)

Write source maps correctly on the CLI when using --watch (#19373)

Handle special defaults (like ringColor.DEFAULT) in JS configs (#19348)

Improve backwards compatibility for content theme key from JS configs (#19381)

Upgrade: Handle future and experimental config keys (#19344)

Try to canonicalize any arbitrary utility to a bare value (#19379)

Validate candidates similarly to Oxide (#19397)

Canonicalization: combine text-* and leading-* classes (#19396)

Correctly handle duplicate CLI arguments (#19416)

Don’t emit color-mix fallback rules inside @keyframes (#19419)

CLI: Don't hang when output is /dev/stdout (#19421)

v4.1.17

Fixed

Substitute @variant inside legacy JS APIs (#19263)

Prevent occasional crash on Windows when loaded into a worker thread (#19242)

v4.1.16

Fixed

Discard candidates with an empty data type (#19172)

Fix canonicalization of arbitrary variants with attribute selectors (#19176)

Fix invalid colors due to nested & (#19184)

Improve canonicalization for & > :pseudo and & :pseudo arbitrary variants (#19178)

v4.1.15

Fixed

Fix Safari devtools rendering issue due to color-mix fallback (#19069)

Suppress Lightning CSS warnings about :deep, :slotted, and :global (#19094)

Fix resolving theme keys when starting with the name of another theme key in JS configs and plugins (#19097)

Allow named groups in combination with not-*, has-*, and in-* (#19100)

Prevent important utilities from affecting other utilities (#19110)

Don’t index into strings with the theme(…) function (#19111)

Fix parsing issue when \t is used in at-rules (#19130)

Upgrade: Canonicalize utilities containing 0 values (#19095)

Upgrade: Migrate deprecated break-words to wrap-break-word (#19157)

Changed

Remove the postinstall script from oxide (#19149)

... (truncated)

Changelog

Sourced from tailwindcss's changelog.

[4.1.18] - 2025-12-11

Fixed

Ensure validation of source(…) happens relative to the file it is in (#19274)

Include filename and line numbers in CSS parse errors (#19282)

Skip comments in Ruby files when checking for class names (#19243)

Skip over arbitrary property utilities with a top-level ! in the value (#19243)

Support environment API in @tailwindcss/vite (#18970)

Preserve case of theme keys from JS configs and plugins (#19337)

Write source maps correctly on the CLI when using --watch (#19373)

Handle special defaults (like ringColor.DEFAULT) in JS configs (#19348)

Improve backwards compatibility for content theme key from JS configs (#19381)

Upgrade: Handle future and experimental config keys (#19344)

Try to canonicalize any arbitrary utility to a bare value (#19379)

Validate candidates similarly to Oxide (#19397)

Canonicalization: combine text-* and leading-* classes (#19396)

Correctly handle duplicate CLI arguments (#19416)

Don’t emit color-mix fallback rules inside @keyframes (#19419)

CLI: Don't hang when output is /dev/stdout (#19421)

Commits

9b32f7c Release v4.1.18 (#19431)
820d907 Expose candidatesToAst to the language server (#19405)
478e959 Don’t emit color-mix fallback rules inside @keyframes (#19419)
a5f4644 Validate named values in candidate parser (#19397)
229121d Canonicalization: combine text-* and leading-* classes (#19396)
243615e Handle backwards compatibility for content theme from JS configs (#19381)
7642751 Improve compatibility with special default values in JS configs (#19348)
af48117 remove unnecessary intermediate check
9e436f7 Try to canonicalize any arbitrary utility to a bare value (#19379)
479b725 Bump Vitest to v4 (#19216)
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dependabot · 2026-01-15T01:19:26Z

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vercel · 2026-01-15T01:19:27Z

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github-actions · 2026-01-15T01:21:18Z

⚠️ This is a major version update. Please review carefully before merging.

github-actions · 2026-01-15T07:32:20Z

⚠️ This is a major version update. Please review carefully before merging.

github-actions · 2026-01-15T07:37:46Z

⚠️ This is a major version update. Please review carefully before merging.

github-actions · 2026-01-15T08:07:50Z

⚠️ This is a major version update. Please review carefully before merging.

github-actions · 2026-01-15T08:15:33Z

⚠️ This is a major version update. Please review carefully before merging.

github-actions · 2026-01-15T10:34:27Z

⚠️ This is a major version update. Please review carefully before merging.

github-actions · 2026-01-15T12:06:28Z

⚠️ This is a major version update. Please review carefully before merging.

Copilot

Pull request overview

This PR upgrades Tailwind CSS from version 3.x to 4.1.18 across the monorepo. This is a major version upgrade that introduces breaking changes in Tailwind's architecture and configuration system.

Changes:

Bumped tailwindcss dependency from ^3.4.19 to ^4.1.18 across all packages
Updated version constraints in root workspace, components package, and example applications

Reviewed changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated 3 comments.

File	Description
package.json	Root workspace dependency updated to Tailwind CSS 4.1.18
packages/components/package.json	Components package devDependency updated to Tailwind CSS 4.1.18
examples/prototype/package.json	Prototype example devDependency updated to Tailwind CSS 4.1.18
examples/designer-modes/package.json	Designer modes example devDependency updated to Tailwind CSS 4.1.18

Files not reviewed (1)

pnpm-lock.yaml: Language not supported

Copilot · 2026-01-15T12:08:26Z

packages/components/package.json

    "autoprefixer": "^10.4.16",
    "postcss": "^8.4.31",
-    "tailwindcss": "^3.3.5",
+    "tailwindcss": "^4.1.18",


Tailwind CSS v4 introduces breaking changes including a complete configuration system overhaul (CSS-first config vs JS config), removal of certain utilities, and changes to the build architecture. This major version upgrade may break existing Tailwind usage throughout the codebase. Ensure all Tailwind configuration files, custom utilities, and component styles have been migrated according to the v4 migration guide, and verify that the existing CSS architecture remains compatible with the new CSS-native configuration approach required by v4.

Suggested change

"tailwindcss": "^4.1.18",

"tailwindcss": "^3.4.17",

Copilot · 2026-01-15T12:08:27Z

examples/prototype/package.json

    "globals": "^16.5.0",
    "postcss": "^8.5.6",
-    "tailwindcss": "^3.4.19",
+    "tailwindcss": "^4.1.18",


The version upgrade from v3 to v4 requires migration of Tailwind configuration and CSS imports. Tailwind v4 uses a CSS-first configuration approach with @import "tailwindcss" instead of the traditional tailwind.config.js file. Verify that this example has been updated with the appropriate configuration changes, CSS import statements, and any necessary PostCSS plugin adjustments for v4 compatibility.

Copilot · 2026-01-15T12:08:27Z

examples/designer-modes/package.json

    "globals": "^16.5.0",
    "postcss": "^8.5.6",
-    "tailwindcss": "^3.4.19",
+    "tailwindcss": "^4.1.18",


The version upgrade from v3 to v4 requires migration of Tailwind configuration and CSS imports. Tailwind v4 uses a CSS-first configuration approach with @import "tailwindcss" instead of the traditional tailwind.config.js file. Verify that this example has been updated with the appropriate configuration changes, CSS import statements, and any necessary PostCSS plugin adjustments for v4 compatibility.

github-actions · 2026-01-15T12:16:47Z

⚠️ This is a major version update. Please review carefully before merging.

github-actions · 2026-01-15T12:26:07Z

⚠️ This is a major version update. Please review carefully before merging.

github-actions · 2026-01-15T13:13:45Z

⚠️ This is a major version update. Please review carefully before merging.

github-actions · 2026-01-15T17:55:18Z

⚠️ This is a major version update. Please review carefully before merging.

Bumps [tailwindcss](https://github.com/tailwindlabs/tailwindcss/tree/HEAD/packages/tailwindcss) from 3.4.19 to 4.1.18. - [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/v4.1.18/packages/tailwindcss) --- updated-dependencies: - dependency-name: tailwindcss dependency-version: 4.1.18 dependency-type: direct:development update-type: version-update:semver-major ... Signed-off-by: dependabot[bot] <[email protected]>

github-actions · 2026-01-16T16:13:32Z

⚠️ This is a major version update. Please review carefully before merging.

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huangyiirene requested a review from Copilot January 15, 2026 12:07

Copilot AI reviewed Jan 15, 2026

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chore(deps-dev): bump tailwindcss from 3.4.19 to 4.1.18 #61

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chore(deps-dev): bump tailwindcss from 3.4.19 to 4.1.18 #61

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v4.1.18

Fixed

v4.1.17

Fixed

v4.1.16

Fixed

v4.1.15

Fixed

Changed

[4.1.18] - 2025-12-11

Fixed

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