const themeBtn = document.getElementById('changeThemeBtn'); if (darkThemeStyle.disabled) themeBtn.innerText = 'Dark\ntheme'; themeBtn.onclick = function() { darkThemeStyle.disabled = !darkThemeStyle.disabled; if (localStorage.getItem('theme') !== 'light') { themeBtn.innerText = 'Dark\ntheme'; localStorage.setItem('theme', 'light'); } else { themeBtn.innerText = 'Light\ntheme'; localStorage.setItem('theme', 'dark'); } }