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Antigravity Agent 504fd5fb42 [G1-Sync] Manual knowledge update

2026-05-10 22:08:15 +09:00

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title

vanilla-extract

매 한 줄

"매 TypeScript 로 type-safe 한 zero-runtime CSS-in-JS". 매 Mark Dalgleish (Seek) 가 2021 년 출시. 매 .css.ts 파일을 build time 에 static CSS 로 추출, 매 token / variant / theme 매 모두 typed. 매 Next.js App Router (RSC) 의 사실상 표준, 매 component library 배포 의 zero-runtime guarantee.

매 핵심

매 핵심 API

style({...}): 매 single CSS class 생성 → unique class name 반환.
globalStyle('selector', {...}): 매 global selector style.
recipe({base, variants}): 매 variant-based component (CVA-like, type-safe).
createTheme(contract, values): 매 token 의 ThemeProvider 대안.
createThemeContract({...}): 매 token shape 정의 (multi-theme).
createVar(): 매 CSS custom property (runtime dynamic).
style([base, override]): 매 style composition.

매 build setup

Webpack: @vanilla-extract/webpack-plugin.
Vite: @vanilla-extract/vite-plugin.
Next.js: @vanilla-extract/next-plugin (App Router 호환).
esbuild / Rollup / Parcel: 매 dedicated plugins.
매 결과: .css.ts → .css 추출 + .js 의 class name string export.

매 응용

Design system 의 token-based theming.
Next.js App Router 의 RSC-compatible styling.
Component library 의 zero-runtime publish.
CVA-style variants via recipes.
CSS variable scoped to component.

💻 패턴

Basic style

// button.css.ts
import { style } from '@vanilla-extract/css';

export const button = style({
  padding: '8px 16px',
  borderRadius: 4,
  background: 'blue',
  color: 'white',
  cursor: 'pointer',
  selectors: {
    '&:hover': { background: 'darkblue' },
    '&:disabled': { opacity: 0.5, cursor: 'not-allowed' },
  },
});

// button.tsx
import { button } from './button.css';
export const Button = (props) => <button className={button} {...props} />;

Theme contract — multi-theme

// theme.css.ts
import { createTheme, createThemeContract } from '@vanilla-extract/css';

export const vars = createThemeContract({
  color: { brand: null, text: null, bg: null, border: null },
  space: { xs: null, sm: null, md: null, lg: null, xl: null },
  radius: { sm: null, md: null, lg: null },
  font: { sans: null, mono: null },
});

export const lightTheme = createTheme(vars, {
  color: { brand: '#0066ff', text: '#111', bg: '#fff', border: '#e0e0e0' },
  space: { xs: '4px', sm: '8px', md: '16px', lg: '24px', xl: '32px' },
  radius: { sm: '2px', md: '4px', lg: '8px' },
  font: { sans: 'Inter, sans-serif', mono: 'JetBrains Mono, monospace' },
});

export const darkTheme = createTheme(vars, {
  color: { brand: '#3399ff', text: '#fff', bg: '#0a0a0a', border: '#222' },
  space: { xs: '4px', sm: '8px', md: '16px', lg: '24px', xl: '32px' },
  radius: { sm: '2px', md: '4px', lg: '8px' },
  font: { sans: 'Inter, sans-serif', mono: 'JetBrains Mono, monospace' },
});

// app.tsx
<html className={isDark ? darkTheme : lightTheme}>

Component using vars

// card.css.ts
import { style } from '@vanilla-extract/css';
import { vars } from './theme.css';

export const card = style({
  background: vars.color.bg,
  color: vars.color.text,
  border: `1px solid ${vars.color.border}`,
  padding: vars.space.md,
  borderRadius: vars.radius.lg,
  fontFamily: vars.font.sans,
});

Recipes — variants (CVA-like)

// button.css.ts
import { recipe, RecipeVariants } from '@vanilla-extract/recipes';
import { vars } from './theme.css';

export const button = recipe({
  base: {
    padding: vars.space.sm,
    borderRadius: vars.radius.md,
    cursor: 'pointer',
    border: 'none',
    fontFamily: vars.font.sans,
  },
  variants: {
    intent: {
      primary: { background: vars.color.brand, color: '#fff' },
      secondary: { background: 'transparent', color: vars.color.brand,
                   border: `1px solid ${vars.color.brand}` },
      danger: { background: '#dc2626', color: '#fff' },
    },
    size: {
      sm: { fontSize: 12, padding: vars.space.xs },
      md: { fontSize: 14, padding: vars.space.sm },
      lg: { fontSize: 18, padding: vars.space.md },
    },
    fullWidth: {
      true: { width: '100%' },
    },
  },
  compoundVariants: [
    { variants: { intent: 'primary', size: 'lg' },
      style: { fontWeight: 'bold' } },
  ],
  defaultVariants: { intent: 'primary', size: 'md' },
});

export type ButtonVariants = RecipeVariants<typeof button>;
// type ButtonVariants = { intent?: 'primary' | 'secondary' | 'danger'; size?: ...; fullWidth?: boolean }

// usage
<button className={button({ intent: 'danger', size: 'lg' })}>Delete</button>

Sprinkles — atomic CSS (Tailwind-like)

// sprinkles.css.ts
import { defineProperties, createSprinkles } from '@vanilla-extract/sprinkles';

const space = defineProperties({
  properties: {
    padding: { sm: 8, md: 16, lg: 24 },
    margin: { sm: 8, md: 16, lg: 24 },
  },
  shorthands: { p: ['padding'], m: ['margin'] },
});

export const sprinkles = createSprinkles(space);

// usage
<div className={sprinkles({ p: 'md', m: 'sm' })}>...</div>

Global style + reset

// reset.css.ts
import { globalStyle } from '@vanilla-extract/css';

globalStyle('html, body', {
  margin: 0,
  padding: 0,
  fontFamily: 'system-ui, sans-serif',
});

globalStyle('*', {
  boxSizing: 'border-box',
});

// 매 import 'one' 으로 reset 적용
// app.tsx: import './reset.css';

Dynamic value via createVar

// progress.css.ts
import { createVar, style } from '@vanilla-extract/css';

export const progressVar = createVar();

export const bar = style({
  width: progressVar,
  background: 'blue',
  height: 4,
  transition: 'width 0.3s',
});

// progress.tsx
import { assignInlineVars } from '@vanilla-extract/dynamic';

<div
  className={bar}
  style={assignInlineVars({ [progressVar]: `${percent}%` })}
/>
// 매 runtime dynamic — CSS variable 로 변환.

Style composition

import { style } from '@vanilla-extract/css';

const base = style({ padding: 8, fontSize: 14 });
const primary = style([base, { background: 'blue', color: 'white' }]);
// 매 primary class = base class + extra rules.

Next.js App Router setup

// next.config.js
const { createVanillaExtractPlugin } = require('@vanilla-extract/next-plugin');
const withVanillaExtract = createVanillaExtractPlugin();
module.exports = withVanillaExtract({
  // ... existing config
});

// app/layout.tsx
import { lightTheme } from './theme.css';
import './reset.css';

export default function RootLayout({ children }) {
  return <html className={lightTheme}>{children}</html>;
}
// 매 RSC 호환 — server component 에서 매 className 사용 가능.

매 결정 기준

상황	Approach
Next.js App Router (RSC)	vanilla-extract (built-in plugin).
Type-safe theme tokens	`createThemeContract` + `createTheme`.
CVA-style variants	`recipe`.
Atomic / Tailwind-like	`sprinkles`.
Runtime dynamic value	`createVar` + `assignInlineVars`.
Component library 배포	vanilla-extract (zero runtime).

기본값: style (single class), recipe (variants), createThemeContract (multi-theme), createVar (runtime dynamic).

🔗 Graph

부모: CSS-in-JS · Zero-Runtime CSS-in-JS
변형: Linaria · Panda CSS · StyleX · CSS Modules
응용: Design System · Next.js App Router · React Server Components
Adjacent: CVA · Tailwind CSS · Sprinkles

🤖 LLM 활용

언제: Next.js App Router (RSC), type-safe design system, component library 배포, multi-theme (light/dark/brand) 의. 언제 X: 매 simple prototype (Tailwind 매 빠름), 매 highly-dynamic per-pixel value (CSS-in-JS runtime 가 더 적합), 매 already emotion / styled-components codebase 의 incremental migration 어려움.

❌ 안티패턴

Runtime value 직접 사용: 매 style({ width: dynamicWidth }) — dynamicWidth 매 build time 에 evaluable 해야. 매 runtime 매 createVar.
.css.ts 의 conditional logic: 매 if (env.X) 매 build-time evaluated — 매 runtime 분기 X.
Theme class 의 dynamic apply 미숙: 매 theme 변경 시 <html className={isDark ? darkTheme : lightTheme}> — 매 root 단위.
plugin setup 누락: 매 webpack/vite plugin 없으면 .css.ts 매 그냥 TS file 로 처리 — error.
recipe 의 base 의 selector: 매 recipe base 안의 selectors 매 매 supported 하나 매 syntax 주의.

🧪 검증 / 중복

Verified (vanilla-extract.style 공식 문서, GitHub seek-oss/vanilla-extract).
신뢰도 A.

🕓 Changelog

날짜	변경
2026-05-08	Phase 1
2026-05-10	Manual cleanup — vanilla-extract API 전체 (style, recipe, theme contract, sprinkles, createVar) 추가

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