let darkMode = window.matchMedia("(prefers-color-scheme: dark)").matches; window .matchMedia("(prefers-color-scheme: dark)") .addEventListener("change", (event) => { DarkMode.setDark(event.matches); }); export const DarkMode = { isDark: () => darkMode, setDark: (value: boolean) => { darkMode = value; document.body.classList.toggle("dark", darkMode); return darkMode; }, toggle: () => { DarkMode.setDark(!darkMode); }, }; DarkMode.setDark(darkMode);