document.querySelector('nav > button')?.addEventListener('click', (e) => { document.querySelector('nav').classList.toggle('visible'); }) function applyTheme(theme){ const html = document.querySelector('html') document.cookie = `theme=${theme}; path=/; expires=; SameSite=Strict; Secure` html.classList.remove('dark', 'light') html.classList.add(theme) } document.querySelectorAll('.toggleTheme')?.forEach( element => element.addEventListener('click', (e) => { const newTheme = element.dataset.theme; applyTheme(newTheme); } ) ); const themeFromCookie = document.cookie .split("; ") .find((row) => row.startsWith("theme=")) ?.split("=")[1]; if (themeFromCookie) { applyTheme(themeFromCookie) }