const toggleSwitch = document.querySelector('input[type="checkbox"].theme-switch');

    if (localStorage.theme === 'dark' || (!('theme' in localStorage) && window.matchMedia('(prefers-color-scheme:dark)').matches)) {
        document.documentElement.classList.add('dark');
        toggleSwitch.checked = true;
    } else {
        document.documentElement.classList.remove('dark')
    }
    function switchTheme(e) {
        if (e.target.checked) {
            localStorage.setItem('theme', 'dark');
            document.documentElement.classList.add('dark');
        } else {
            localStorage.setItem('theme', 'light');
            document.documentElement.classList.remove('dark')
        }
    }
    toggleSwitch.addEventListener('change', switchTheme, false);