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이름만 다른(표기 변형) [[위키링크]]를 대상 문서의 canonical 제목으로 치환해 끊겼던 1,200개 링크를 연결. 제목/파일명 정규화 일치만 적용하고 별칭 매칭은 과병합 위험으로 제외(애매성 가드). 원본은 _link_reconcile_backup/ 에 백업. 도구: Datacollect/scripts/link_reconcile_apply.mjs Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
183 lines
5.5 KiB
Markdown
183 lines
5.5 KiB
Markdown
---
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id: wiki-2026-0508-styled-components
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title: Styled Components
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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: [styled-components, CSS-in-JS]
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duplicate_of: none
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source_trust_level: A
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confidence_score: 0.9
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verification_status: applied
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tags: [react, css-in-js, frontend, styling]
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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: typescript
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framework: react
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---
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# Styled Components
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## 매 한 줄
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> **"매 CSS 의 component 의 안에 — 매 tagged template literal 로 매 React component + style 의 atomic unit"**. Glen Maddern, Max Stoiber (2016). 매 CSS-in-JS 의 reference. 2026 매 styled-components v6+ 가 매 React Server Components 의 partial 지원 — 매 RSC native era 에서 매 Tailwind / vanilla-extract / CSS Modules 의 challenge.
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## 매 핵심
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### 매 mechanic
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- 매 tagged template literal: ``styled.button`color: red```.
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- 매 runtime 의 unique class name 의 generation, 매 stylesheet 의 inject.
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- 매 props-based dynamic styling: ``${props => props.primary ? '#0070f3' : '#fff'}``.
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### 매 features
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- **Theming**: ThemeProvider context.
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- **`as` prop**: 매 polymorphic element.
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- **Extending**: ``styled(Button)`...```.
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- **Animations**: keyframes helper.
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- **Global styles**: createGlobalStyle.
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### 매 응용
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1. React design system (Material-like component lib).
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2. Theme switcher (dark mode).
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3. Per-component style isolation.
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## 💻 패턴
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### Basic styled component (TypeScript)
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```tsx
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import styled from "styled-components";
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const Button = styled.button<{ $primary?: boolean }>`
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padding: 8px 16px;
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border-radius: 6px;
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border: none;
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cursor: pointer;
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background: ${(p) => (p.$primary ? "#0070f3" : "#eee")};
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color: ${(p) => (p.$primary ? "#fff" : "#222")};
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&:hover { opacity: 0.9; }
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`;
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export default function App() {
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return <Button $primary>Buy</Button>;
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}
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```
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### Theme + ThemeProvider
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```tsx
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import { ThemeProvider, DefaultTheme } from "styled-components";
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const dark: DefaultTheme = { bg: "#111", fg: "#eee", accent: "#0af" };
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const light: DefaultTheme = { bg: "#fff", fg: "#111", accent: "#06c" };
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const Card = styled.div`
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background: ${(p) => p.theme.bg};
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color: ${(p) => p.theme.fg};
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padding: 16px;
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`;
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export default function App() {
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const [mode, setMode] = useState<"light" | "dark">("dark");
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return (
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<ThemeProvider theme={mode === "dark" ? dark : light}>
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<Card>Hello</Card>
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</ThemeProvider>
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);
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}
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```
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### Extending another styled component
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```tsx
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const Base = styled.button`padding: 8px; border-radius: 4px;`;
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const Danger = styled(Base)`background: #e00; color: white;`;
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```
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### `as` polymorphic prop
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```tsx
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const Box = styled.div`padding: 16px;`;
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<Box as="section" /> // renders <section>
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<Box as={Link} to="/x" /> // renders react-router Link
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```
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### Keyframes animation
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```tsx
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import styled, { keyframes } from "styled-components";
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const pulse = keyframes`
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0% { transform: scale(1); }
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50% { transform: scale(1.1); }
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100% { transform: scale(1); }
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`;
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const Pulser = styled.div`animation: ${pulse} 1s infinite;`;
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```
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### Global styles
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```tsx
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import { createGlobalStyle } from "styled-components";
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const Global = createGlobalStyle`
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body { margin: 0; font-family: Inter, sans-serif; background: ${(p) => p.theme.bg}; }
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`;
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```
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### css helper for shared mixin
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```tsx
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import { css } from "styled-components";
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const truncate = css`
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white-space: nowrap;
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overflow: hidden;
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text-overflow: ellipsis;
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`;
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const Title = styled.h2`${truncate} font-size: 24px;`;
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```
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### Next.js 14+ App Router (RSC) — 매 'use client'
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```tsx
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"use client";
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import styled from "styled-components";
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export const Button = styled.button`color: red;`;
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```
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```tsx
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// app/layout.tsx — registry pattern for SSR
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import StyledRegistry from "./StyledRegistry";
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export default function Root({ children }) {
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return <html><body><StyledRegistry>{children}</StyledRegistry></body></html>;
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}
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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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| React SPA, 매 dynamic theming heavy | styled-components / emotion |
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| React Server Components 의 native | vanilla-extract / CSS Modules / Tailwind |
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| Utility-first, design system | Tailwind CSS v4 |
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| Build-time zero-runtime | vanilla-extract / Linaria |
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| Component lib for distribution | CSS Modules + tokens |
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**기본값** (2026): 매 새 React project — Tailwind 의 default. styled-components 의 dynamic + theme heavy app 에 still-valid.
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## 🔗 Graph
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- 부모: [[CSS_Architecture_and_Styling|CSS-in-JS]] · [[React]]
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- 변형: [[vanilla-extract]]
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- 응용: [[Design System]] · [[Theme Switching]]
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- Adjacent: [[CSS_Architecture_and_Styling|Tailwind CSS]] · [[CSS Modules]] · [[React Server Components — 경계 의식]]
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## 🤖 LLM 활용
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**언제**: dynamic prop-based styles 의 heavy, theme switching 의 first-class, existing CSS-in-JS app.
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**언제 X**: 매 RSC-first new app — runtime cost + 'use client' boundary 의 friction. 매 Tailwind / vanilla-extract 의 prefer.
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## ❌ 안티패턴
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- **Inline style prop interpolation 의 every render**: 매 className thrash 의 perf hit. 매 attrs / static class 의 사용.
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- **No `$` prefix on props**: 매 DOM warning (unknown attribute). 매 transient prop 의 사용 — `$primary`.
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- **createGlobalStyle 의 multiple instances**: 매 conflict.
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- **SSR without registry**: 매 FOUC. Next.js registry 의 setup.
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## 🧪 검증 / 중복
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- Verified (styled-components.com docs v6, 2025; Next.js 14 App Router CSS-in-JS guide).
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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 — styled-components v6 + RSC era guidance |
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