Use when wiring Tailwind CSS into Astro, SvelteKit, Nuxt, or Remix: choosing the right install path per framework + Tailwind version, picking the correct config file (astro.config.mjs, svelte.config.js, nuxt.config.ts, vite.config.ts), placing the global CSS in the framework-specific location, importing it from the right entry (layout, root, app.vue), and handling SSR/CSR specifics. Prevents the wrong-integration trap (using @astrojs/tailwind with v4 instead of @tailwindcss/vite, using @nuxtjs/tailwindcss module with v4 instead of the Vite plugin), the missing-import trap (global CSS file exists but never imported in layout/root, so utilities silently miss), the SSR-flash trap (CSS not in critical path because imported in client-only branch), the v3-v4 mix-up (npx astro add tailwind installs the v3 integration even in a v4 project), and the wrong-CSS-path trap (Nuxt expects ./app/assets/css/main.css, Remix expects ./app/tailwind.css with ?url query). Covers Astro 4+/5+ (v4 via Vite plugin in astro.config, v3
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Use when wiring Tailwind CSS into Astro, SvelteKit, Nuxt, or Remix: choosing the right install path per framework + Tailwind version, picking the correct config file (astro.config.mjs, svelte.config.js, nuxt.config.ts, vite.config.ts), placing the global CSS in the framework-specific location, importing it from the right entry (layout, root, app.vue), and handling SSR/CSR specifics. Prevents the wrong-integration trap (using @astrojs/tailwind with v4 instead of @tailwindcss/vite, using @nuxtjs/tailwindcss module with v4 instead of the Vite plugin), the missing-import trap (global CSS file exists but never imported in layout/root, so utilities silently miss), the SSR-flash trap (CSS not in critical path because imported in client-only branch), the v3-v4 mix-up (npx astro add tailwind installs the v3 integration even in a v4 project), and the wrong-CSS-path trap (Nuxt expects ./app/assets/css/main.css, Remix expects ./app/tailwind.css with ?url query). Covers Astro 4+/5+ (v4 via Vite plugin in astro.config, v3 via @astrojs/tailwind), SvelteKit (Vite plugin + +layout.svelte import for both versions), Nuxt 3+/4+ (v4 via @tailwindcss/vite + css array entry, v3 via @nuxtjs/tailwindcss module), Remix (Vite plugin + LinksFunction in root.tsx with ?url stylesheet import), per-framework gotchas (Svelte :global, Nuxt assets path, Astro Vite-config bridge, Remix stylesheet URL import). Keywords: tailwind astro install, astro tailwind v4, npx astro add tailwind, @astrojs/tailwind, tailwind sveltekit, sveltekit tailwind v4, sveltekit tailwind layout, tailwind nuxt v4, nuxt @tailwindcss/vite, @nuxtjs/tailwindcss module, nuxt config css array, tailwind remix, remix tailwind links function, remix tailwind v4, app/tailwind.css remix, root.tsx links stylesheet, +layout.svelte tailwind import, app.css sveltekit, global.css astro, main.css nuxt, framework guides tailwind, ssr tailwind flash, my classes not working astro, tailwind not loading sveltekit, nuxt tailwind module vs plugin, remix v3 vs v4 tailwind, how to install tailwind nuxt, how to install tailwind sveltekit, how to install tailwind astro, how to install tailwind remix, framework-specific tailwind setup, tailwind 3-4 framework guide.
license
MIT
compatibility
Designed for Claude Code. Requires Tailwind CSS v3.4 or v4.0+.
metadata
{"author":"OpenAEC-Foundation","version":"1.0"}
Tailwind CSS Build Integration for Astro, SvelteKit, Nuxt, Remix
These four meta-frameworks all run on Vite under the hood, but each
hides Vite behind its own config layer and entry contract. Tailwind
wiring is therefore framework-specific, and v3 and v4 take different
paths inside each one.
ALWAYS pick the integration that matches the Tailwind major version :
Framework
v3 integration
v4 integration
Astro
@astrojs/tailwind
@tailwindcss/vite
SvelteKit
tailwindcss PostCSS plugin
@tailwindcss/vite
Nuxt
@nuxtjs/tailwindcss module
@tailwindcss/vite
Remix
tailwindcss PostCSS plugin
@tailwindcss/vite
The v4 path converges across all four : add @tailwindcss/vite to
the framework's Vite config and import a single CSS file with
@import "tailwindcss";. The v3 paths differ because v3 ships
framework-specific integrations.
Companion skills :
tailwind-impl-build-vite : underlying Vite plugin mechanics
This installs tailwindcss + @astrojs/tailwind and writes
tailwind.config.mjs and updates astro.config.mjs automatically.
ALWAYS accept the auto-edit ; manual setup is unsupported.
The module wires PostCSS, generates a default config, and exposes
hooks for tailwind.config.{js,ts,mjs}. No app.vue import needed ;
the module injects the stylesheet automatically.
1. Did you install both `tailwindcss` and the framework integration ?
├── No : reinstall both
└── Yes : continue
2. Is the integration registered in the framework's config ?
├── No : add it
└── Yes : continue
3. Does the entry CSS file actually exist at the expected path ?
├── No : create it
└── Yes : continue
4. Is the entry CSS imported / referenced by the framework's entry ?
├── Astro : import "../styles/global.css" in layout
├── SvelteKit : import "../app.css" in +layout.svelte
├── Nuxt v4 : "./app/assets/css/main.css" in nuxt.config.css
├── Nuxt v3 : (handled by module)
└── Remix : LinksFunction in root.tsx
5. Browser DevTools : is the stylesheet loaded ?
├── No : check the import path
└── Yes : check content/source scope (per tailwind-impl-build-vite)
Patterns
Pattern : Nuxt module vs Vite plugin
v3 SHOULD use @nuxtjs/tailwindcss because the module wires PostCSS,
config discovery, and dev-server reloads correctly with Nuxt's nitro
pipeline. v4 MUST use @tailwindcss/vite because the Nuxt module
has not adopted v4 at the time of writing.
NEVER install both. The module owns config discovery ; adding the Vite
plugin alongside it double-emits CSS.
Pattern : Astro v3 auto-install vs v4 manual
For v3 ALWAYS run npx astro add tailwind. The integration package
configures astro.config.mjs and emits tailwind.config.mjs with
content paths the Astro engine understands.
For v4 ALWAYS configure manually via @tailwindcss/vite in
astro.config.mjs > vite.plugins. The @astrojs/tailwind integration
does NOT understand v4 directives and produces broken output if used
with v4.
Pattern : Svelte scoped styles with @apply (v4)
In SvelteKit + v4, @apply inside <style> blocks requires
@reference to resolve tokens :
Importing the CSS in root.tsx without the LinksFunction works in
dev but fails in production builds because Remix splits client and
server bundles. The ?url import ensures Vite emits the asset and
returns its URL.
Pattern : Nuxt CSS array vs
Nuxt v4 expects the entry stylesheet in the css array of
nuxt.config.ts. NEVER put @import "tailwindcss" inside an
app.vue<style> block ; Nuxt only treats files listed in css
as global. Component <style scoped> blocks need @reference like Svelte.
Anti-Patterns
NEVER use @astrojs/tailwind with v4. It is a v3-only integration.
NEVER use @nuxtjs/tailwindcss with v4. Use @tailwindcss/vite instead.
NEVER skip the ?url query on the Remix CSS import. Vite will inline
the CSS as a JS module string instead of emitting it as an asset.
NEVER mix @tailwind base/components/utilities (v3 directives) with
@import "tailwindcss" (v4 directive) in the same entry CSS.
NEVER assume npx astro add tailwind works for v4 ; the integration
it installs is v3-pinned.
See references/anti-patterns.md for the full catalog with quoted
error symptoms and fixes.
