let theme = localStorage.getItem("data-theme"); const themeToggle = document.querySelector("#theme-toggle"); const changeThemeToDark = () => { document.documentElement.setAttribute("data-theme", "dark"); localStorage.setItem("data-theme", "dark"); }; const changeThemeToLight = () => { document.documentElement.setAttribute("data-theme", "light"); localStorage.setItem("data-theme", "light"); }; if (theme === "dark") { changeThemeToDark(); } themeToggle.addEventListener("click", () => { let theme = localStorage.getItem("data-theme"); if (theme === "dark") { changeThemeToLight(); } else { changeThemeToDark(); } });