Function handler

javascript/grid-ui/src/contexts/ThemeContext.tsx:59–59

(e: MediaQueryListEvent)

    if (typeof window !== 'undefined' && window.matchMedia) {
      const mediaQuery = window.matchMedia('(prefers-color-scheme: dark)')
      const handler = (e: MediaQueryListEvent) => setSystemPrefersDark(e.matches)
      mediaQuery.addEventListener('change', handler)
      return () => mediaQuery.removeEventListener('change', handler)
    }