Function onChange

packages/dev/s2-docs/pages/s2/home/ExampleApp.tsx:240–240

()

  useEffect(() => {
    let m = matchMedia('(prefers-color-scheme: dark)');
    let onChange = () => setColorScheme(null);
    m.addEventListener('change', onChange);
    return () => m.removeEventListener('change', onChange);
  }, []);