https://isainative.dev/src/theme-init.js

1(() => {
2  const storageKey = 'is-ai-native-theme';
3  let mode = 'system';
4
5  try {
6    const saved = localStorage.getItem(storageKey);
7    if (saved === 'light' || saved === 'dark' || saved === 'system') {
8      mode = saved;
9    }
10  } catch {
11    mode = 'system';
12  }
13
14  const prefersDark = window.matchMedia('(prefers-color-scheme: dark)').matches;
15  const resolved = mode === 'system' ? (prefersDark ? 'dark' : 'light') : mode;
16  const root = document.documentElement;
17
18  root.dataset.themeMode = mode;
19  root.dataset.theme = resolved;
20  root.style.colorScheme = resolved;
21})();