my-links/inertia/components/theme_switcher.tsx

import { Fragment } from 'react';
import Toggle from 'react-toggle';
import 'react-toggle/style.css';
import useDarkTheme from '~/hooks/use_dark_theme';

export default function ThemeSwitcher() {
  const { isDarkTheme, toggleDarkTheme } = useDarkTheme();

  if (typeof window === 'undefined') {
    return <Fragment />;
  }

  return (
    <Toggle
      onChange={({ target }) => toggleDarkTheme(target.checked)}
      checked={isDarkTheme}
      name="theme-switcher"
      id="theme-switcher"
      icons={{
        checked: '☀️',
        unchecked: '🌑',
      }}
    />
  );
}