astro/docs-www/public/theme.js

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JavaScript
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(() => {
const root = document.documentElement;
if (localStorage.theme === 'dark' || (!('theme' in localStorage) && window.matchMedia('(prefers-color-scheme: dark)').matches)) {
root.classList.add('theme-dark');
} else {
root.classList.remove('theme-dark');
}
})();