const themeBtn = document.getElementById('changeThemeBtn'); if (darkThemeStyle.disabled) themeBtn.src = '/img/moon-tabler.svg'; themeBtn.style.display = 'initial'; function changeTheme(theme) { if (theme === 'light') { darkThemeStyle.disabled = true; themeBtn.src = '/img/moon-tabler.svg'; } else { darkThemeStyle.disabled = false; themeBtn.src = '/img/sun-tabler.svg'; } } themeBtn.onclick = function() { if (localStorage.getItem('theme') !== 'light') { changeTheme('light'); localStorage.setItem('theme', 'light'); } else { changeTheme('dark'); localStorage.setItem('theme', 'dark'); } }