Files

T

Antigravity Agent f8b21af4be Wiki cleanup: error-doc removal, dedup merge, link normalization

10_Wiki/Topics 대규모 정리:
- 오류 캡처/미완성 stub 문서 227개 제거
- 교차폴더 중복 43클러스터 병합 (63파일 → redirect)
- 링크명 정규화: 깨진 링크 수정·redirect 직결·개념 매핑 ~2,400건
- 카테고리 MOC 6개 신규 생성
- Graph 섹션 미해결 related-keyword 링크 10,058건 제거

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

2026-05-20 23:52:15 +09:00

5.5 KiB

Raw Blame History

id, title, category, status, canonical_id, aliases, duplicate_of, source_trust_level, confidence_score, verification_status, tags, raw_sources, last_reinforced, github_commit, tech_stack

title

Dynamic Theming

매 한 줄

"매 design token 을 runtime swap 할 수 있는 architecture". CSS custom properties (variables) 가 매 modern theming 의 backbone 이며, JS bundle 의 무관 하게 instant theme switching 의 가능. 2026 의 light/dark/high-contrast/brand-variant 의 매 standard.

매 핵심

매 3-layer token 구조

Primitive tokens: raw values (--blue-500: #3B82F6).
Semantic tokens: intent-based (--color-primary: var(--blue-500)).
Component tokens: scope-specific (--button-bg: var(--color-primary)).

매 swap 메커니즘

data-theme="dark" 속성 의 <html> element 의 set.
CSS 의 [data-theme="dark"] { --color-bg: #0a0a0a } 의 override.
매 zero JS re-render — 매 paint cycle 만 trigger.

매 응용

Light/dark mode toggle.
Brand white-labeling (multi-tenant SaaS).
Accessibility (high-contrast, reduced-motion variant).
Per-user customization (saved theme preference).

💻 패턴

Token 정의 (CSS)

:root {
  /* Primitive */
  --blue-500: #3B82F6;
  --gray-900: #111827;
  --gray-50:  #F9FAFB;

  /* Semantic — light default */
  --color-bg: var(--gray-50);
  --color-fg: var(--gray-900);
  --color-primary: var(--blue-500);
}

[data-theme="dark"] {
  --color-bg: var(--gray-900);
  --color-fg: var(--gray-50);
}

[data-theme="high-contrast"] {
  --color-bg: #000;
  --color-fg: #fff;
  --color-primary: #ffff00;
}

Theme provider (React 19)

import { createContext, use, useEffect, useState } from "react";

type Theme = "light" | "dark" | "system";
const ThemeCtx = createContext<{ theme: Theme; set: (t: Theme) => void }>(null!);

export function ThemeProvider({ children }: { children: React.ReactNode }) {
  const [theme, setTheme] = useState<Theme>(
    () => (localStorage.getItem("theme") as Theme) ?? "system"
  );

  useEffect(() => {
    const resolved =
      theme === "system"
        ? matchMedia("(prefers-color-scheme: dark)").matches ? "dark" : "light"
        : theme;
    document.documentElement.dataset.theme = resolved;
    localStorage.setItem("theme", theme);
  }, [theme]);

  return <ThemeCtx value={{ theme, set: setTheme }}>{children}</ThemeCtx>;
}

export const useTheme = () => use(ThemeCtx);

FOUC 방지 (inline script)

<!-- <head> 의 first script — render-blocking 의 의도적 -->
<script>
  (function () {
    const t = localStorage.getItem("theme") || "system";
    const resolved = t === "system"
      ? (matchMedia("(prefers-color-scheme: dark)").matches ? "dark" : "light")
      : t;
    document.documentElement.dataset.theme = resolved;
  })();
</script>

Tailwind 4 의 통합

@import "tailwindcss";

@theme {
  --color-bg: var(--bg);
  --color-fg: var(--fg);
}

:root         { --bg: #fff; --fg: #111; }
[data-theme="dark"] { --bg: #0a0a0a; --fg: #f5f5f5; }

<div className="bg-bg text-fg">매 theme-aware</div>

System preference 의 listen

const mq = matchMedia("(prefers-color-scheme: dark)");
mq.addEventListener("change", (e) => {
  if (localStorage.getItem("theme") === "system") {
    document.documentElement.dataset.theme = e.matches ? "dark" : "light";
  }
});

View Transitions API (smooth swap)

function toggleTheme() {
  if (!document.startViewTransition) {
    flipTheme();
    return;
  }
  document.startViewTransition(() => flipTheme());
}

::view-transition-old(root),
::view-transition-new(root) {
  animation-duration: 250ms;
}

Brand variant (multi-tenant)

[data-brand="acme"]   { --color-primary: #FF6B35; }
[data-brand="globex"] { --color-primary: #2EB872; }

매 결정 기준

상황	Approach
Static site / blog	CSS variable + `data-theme`
SaaS multi-tenant	CSS variable + brand attribute layer
RN / Native	Theme context + StyleSheet (no CSS vars)
Tailwind 의 사용	Tailwind 4 `@theme` + CSS variable
Email template	Inline styles + `prefers-color-scheme` media query

기본값: CSS custom properties + data-theme attribute + inline FOUC script.

🔗 Graph

부모: CSS_Architecture_and_Styling · Design Tokens
변형: Tailwind CSS 4 · CSS_Architecture_and_Styling
응용: Dark Mode · Accessibility (a11y)
Adjacent: View Transitions API

🤖 LLM 활용

언제: design token system 의 설계, dark mode 구현, multi-brand theming. 언제 X: simple 의 single-color brand 의 — 매 over-engineering.

❌ 안티패턴

JS-only theme: setState 의 모든 component re-render — 매 slow 의.
Hard-coded color in component: token 의 bypass — 매 swap 불가능.
No FOUC script: hydration 전 wrong theme flash — 매 jarring UX.
Theme 의 localStorage 의만 의존: SSR 의 server-render mismatch.

🧪 검증 / 중복

Verified (MDN, web.dev, Tailwind CSS docs, Adobe Spectrum 의 token system).
신뢰도 A.

🕓 Changelog

날짜	변경
2026-05-08	Phase 1
2026-05-10	Manual cleanup — 3-layer token + FOUC + View Transitions 추가

5.5 KiB Raw Blame History