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tailwindlabs/tailwindcss

v4.3.5

A utility-first CSS framework powered by the high-speed Rust Oxide engine and CSS-first configuration.

COMPATIBLE
What is tailwindlabs/tailwindcss?

Tailwind CSS is a utility-first styling framework that lets you design components directly in your HTML or JSX using small, composable class names. It removes the pain of inventing CSS class names, switching between files, and fighting unintended style overrides as your project grows.

STYLINGnpm:tailwindcssRustreleases.atom
98,111+12,211 stars (24h)
#tailwindcss#shadcn-ui#rust-tooling
AI Executive Summary & Artifact Size Impact
Quick Summary: What Changed · What To Do · Upgrade Effort

Canonicalization: improve performance in projects with man. Drop-in upgrade. Migration: None.

Semver: PATCH·Manifest: package.json
Artifact Size Impactoxide-engine
+0.1 kB (+0.2%)
70.9 kB → 71.0 kB(72,587B → 72,706B)
Breaking Changes, Release Highlights & Migration Snippet

Key Release Highlights (v4.3.5)

  • Canonicalization: improve performance in projects with many functional variant values (e.g. a matchVariant plugin with thousands of values) (#20663)
  • Don't crash or create a fallback with the wrong color for a color-mix(…) without a color interpolation method (e.g. color-mix(var(--color-red-500)) or `color-mix(currentcolo...
  • Ensure @tailwindcss/oxide-wasm32-wasi loads instead of hanging forever (e.g. with NAPI_RS_FORCE_WASI=error or in WebContainers) (#20667)
  • Remove as: '*.css' from the @tailwindcss/turbopack setup in its README, because it breaks CSS modules (#20660)
Zero Breaking Changes Detected

Verified safe drop-in upgrade for tailwindcss in package.json.

Copy-Paste Upgrade / Migration Snippet
npm install tailwindcss@4.3.5

Ecosystem Compatibility Matrix & Verified Graph Warnings

TypeScript 5.xcompatible— Ships standard TypeScript declaration files without type regressions.

Verified BREAKS_WITH Graph Edges

tailwindcss (v4.3.5)⚡ BREAKS_WITHshadcn (<2.4.0)
Breaking

Tailwind v4 replaces tailwind.config.js with CSS-first @theme blocks, breaking HSL plugin variables in legacy shadcn/ui registries. Run the OKLCH token codemod and upgrade shadcn to v2.4.0. Migration: Moderate.

npx @tailwindcss/upgrade@latest && npx shadcn@latest add --overwrite

Zero-Noise Historical Release Timeline (2)

Format: [Core Change] + [Required Action] + [Migration Effort]
v4.3.5COMPATIBLE⚖️ +0.1 kB (+0.2%) (oxide-engine)

Canonicalization: improve performance in projects with man. Drop-in upgrade. Migration: None.

v4.3.4COMPATIBLE⚖️ +56.7 kB (+356.5%) (oxide-engine)

Add @tailwindcss/turbopack, a Turbopack loader for using. Drop-in upgrade. Migration: None.

Upgrade & Migration Q&A (tailwindlabs/tailwindcss v4.3.5)

Direct Answers for Engineers & AI Agents

Is tailwindlabs/tailwindcss v4.3.5 safe to upgrade in production?

tailwindlabs/tailwindcss v4.3.5 is classified as COMPATIBLE (PATCH release). Canonicalization: improve performance in projects with man. Drop-in upgrade. Migration: None.

What breaking changes or compatibility risks exist in tailwindlabs/tailwindcss v4.3.5?

tailwindcss with shadcn: Tailwind v4 replaces tailwind.config.js with CSS-first @theme blocks, breaking HSL plugin variables in legacy shadcn/ui registries. Run the OKLCH token codemod and upgrade shadcn to v2.4.0. Migration: Moderate.

What is the bundle size impact of tailwindcss v4.3.5?

tailwindcss v4.3.5 records a +0.1 kB (+0.2%) delta (oxide-engine), moving from 72,587 bytes to 72,706 bytes.

How do I upgrade tailwindcss to v4.3.5?

Upgrade tailwindcss to v4.3.5 by running "npm install tailwindcss@4.3.5" and applying the migration steps: npm install tailwindcss@4.3.5