sangwook yoo 3ac66feba2 chore: .agents/.claude 설정·CLAUDE.md·AGENTS.md git 추적 추가
gitignore 의 *.md / .claude/ 차단을 풀어 다음 파일을 git 으로 추적.
- /CLAUDE.md, /AGENTS.md (루트 에이전트 가이드)
- .agents/**/*.md (skills 문서 95개)
- .claude/settings.json (Claude Code 프로젝트 설정)
.claude/worktrees/ 는 git worktree 메타이므로 신규 ignore 라인으로 제외.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-12 18:05:03 +09:00

728 B

title impact impactDescription tags
Subscribe to Derived State MEDIUM reduces re-render frequency rerender, derived-state, media-query, optimization

Subscribe to Derived State

Subscribe to derived boolean state instead of continuous values to reduce re-render frequency.

Incorrect (re-renders on every pixel change):

function Sidebar() {
  const width = useWindowWidth()  // updates continuously
  const isMobile = width < 768
  return <nav className={isMobile ? 'mobile' : 'desktop'} />
}

Correct (re-renders only when boolean changes):

function Sidebar() {
  const isMobile = useMediaQuery('(max-width: 767px)')
  return <nav className={isMobile ? 'mobile' : 'desktop'} />
}