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199 lines
5.6 KiB
Markdown
199 lines
5.6 KiB
Markdown
---
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id: wiki-2026-0508-tailwind-css-v4
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title: Tailwind CSS v4
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category: 10_Wiki/Topics
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status: verified
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canonical_id: self
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aliases: [Tailwind v4, TailwindCSS 4, Tailwind 4.x]
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duplicate_of: none
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source_trust_level: A
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confidence_score: 0.95
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verification_status: applied
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tags: [css, tailwind, frontend, styling, lightning-css]
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raw_sources: []
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last_reinforced: 2026-05-10
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github_commit: pending
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tech_stack:
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language: css
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framework: tailwindcss-v4
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---
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# Tailwind CSS v4
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## 매 한 줄
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> **"매 Tailwind v4 는 CSS-first 의 rebuild — JS config 의 retire, Lightning CSS engine, 5x faster build"**. 매 2025 Q1 stable release. 매 v3 의 `tailwind.config.js` → v4 의 `@theme {}` CSS-native. 매 modern CSS feature (cascade layers, container queries, color-mix, @starting-style) 의 first-class 의 support.
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## 매 핵심
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### 매 v4 의 break (vs v3)
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- **JS config retired**: `tailwind.config.js` → `@theme` directive in CSS.
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- **PostCSS plugin → dedicated**: `@tailwindcss/postcss` or Vite plugin (`@tailwindcss/vite`).
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- **Lightning CSS engine**: Rust-based, 5x faster, native vendor prefixing + nesting.
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- **Single CSS import**: `@import "tailwindcss";` (replaces 3-line directives).
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- **Auto content detection**: heuristic-based, manual `content: [...]` 의 unnecessary in most cases.
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- **CSS variables for everything**: theme tokens 의 `--color-blue-500` 등 native CSS var.
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- **Container queries**: built-in `@container` utility.
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- **3D transforms, color-mix(), @starting-style**: modern CSS feature 의 utility.
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### 매 install (2026)
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```bash
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# Vite
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npm install tailwindcss @tailwindcss/vite
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# PostCSS
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npm install tailwindcss @tailwindcss/postcss
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# CLI
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npm install tailwindcss @tailwindcss/cli
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```
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### 매 응용
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1. **Next.js 15 / Remix / SvelteKit**: Vite plugin 의 default.
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2. **Design system**: `@theme` 의 token export → tailwind + native CSS 의 share.
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3. **Container query layout**: 매 truly responsive component.
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## 💻 패턴
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### 1. CSS-first config (`app.css`)
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```css
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@import "tailwindcss";
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@theme {
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--color-brand-50: oklch(97% 0.02 250);
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--color-brand-500: oklch(60% 0.18 250);
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--color-brand-900: oklch(20% 0.06 250);
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--font-display: "Inter Display", "ui-sans-serif", system-ui;
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--radius-lg: 14px;
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--spacing-section: 5rem;
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--breakpoint-3xl: 1920px;
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}
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/* Custom variants */
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@custom-variant dark (&:where(.dark, .dark *));
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```
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### 2. Vite integration (`vite.config.ts`)
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```typescript
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import { defineConfig } from "vite";
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import tailwindcss from "@tailwindcss/vite";
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export default defineConfig({
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plugins: [tailwindcss()],
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});
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```
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### 3. Container queries
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```html
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<div class="@container">
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<article class="grid grid-cols-1 @md:grid-cols-2 @xl:grid-cols-3">
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<!-- responds to parent .@container, NOT viewport -->
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</article>
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</div>
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```
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### 4. Dark mode (CSS-first)
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```css
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/* app.css */
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@variant dark (&:where(.dark, .dark *));
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```
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```html
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<html class="dark">
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<body class="bg-white dark:bg-zinc-950 text-zinc-900 dark:text-zinc-100">
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...
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</body>
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</html>
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```
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### 5. Arbitrary values + CSS vars
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```html
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<!-- Direct theme token reference -->
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<div class="bg-(--color-brand-500) text-(--color-brand-50)">...</div>
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<!-- Arbitrary -->
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<div class="grid-cols-[repeat(auto-fit,minmax(220px,1fr))]">...</div>
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```
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### 6. 3D transform utilities (v4 new)
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```html
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<div class="perspective-distant">
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<div class="rotate-x-25 rotate-y-15 rotate-z-5 translate-z-10
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transform-3d hover:rotate-y-0 transition-transform duration-500">
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Card
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</div>
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</div>
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```
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### 7. `@starting-style` (entry animation)
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```css
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@layer components {
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.modal {
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@apply opacity-100 translate-y-0 transition-[opacity,translate] duration-300;
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@starting-style {
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opacity: 0;
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translate: 0 1rem;
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}
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}
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}
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```
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### 8. Custom utility / component
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```css
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@utility tab-* {
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tab-size: --value(integer);
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}
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@utility content-auto {
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content-visibility: auto;
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}
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/* usage: class="tab-4 content-auto" */
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```
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### 9. Migration from v3
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```bash
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# Official codemod
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npx @tailwindcss/upgrade@latest
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# checks: deprecated utility renames, config → @theme conversion,
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# @tailwind base/components/utilities → @import "tailwindcss"
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```
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## 매 결정 기준
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| 상황 | Approach |
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|---|---|
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| New project (2026) | v4 직행 |
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| v3 → v4 migration | `@tailwindcss/upgrade` codemod |
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| JS config 의 deeply nested logic | v3 유지 or 매 partial migration |
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| Vite/Next 15+ | `@tailwindcss/vite` |
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| Legacy webpack | `@tailwindcss/postcss` |
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**기본값**: 매 new project 의 v4 + Vite plugin + `@theme` CSS-first config.
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## 🔗 Graph
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- 부모: [[Tailwind-CSS]]
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- 변형: [[Container-Queries]]
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- 응용: [[Next.js]] · [[Design-System]] · [[Component-Library]]
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- Adjacent: [[Lightning-CSS]]
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## 🤖 LLM 활용
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**언제**: utility class composition, migration codemod 의 explain, custom `@utility` 의 design.
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**언제 X**: 매 visual judgment (color, spacing, hierarchy) 매 human eye 의 final.
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## ❌ 안티패턴
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- **v4 에서 v3 식 `tailwind.config.js` 의 keep**: 매 partial work — 매 `@theme` 의 migrate.
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- **`@apply` overuse**: 매 utility 의 advantage 의 lose. 매 component 의 truly repeated 일 때만.
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- **Manual `content: [...]` 의 v4 에서 의무화**: 매 auto-detection 의 trust (special case 만 add).
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- **`@import "tailwindcss/utilities"` 분리**: v4 에서 single `@import "tailwindcss";` 의 sufficient.
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- **Hard-coded color hex 의 spam**: 매 `@theme` token 의 사용.
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## 🧪 검증 / 중복
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- Verified (Tailwind v4.0 release notes Jan 2025, official migration guide, Adam Wathan blog).
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- 신뢰도 A.
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## 🕓 Changelog
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| 날짜 | 변경 |
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|---|---|
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| 2026-05-08 | Phase 1 |
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| 2026-05-10 | Manual cleanup — Tailwind v4 (CSS-first, Lightning CSS, modern features) full canonical |
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