Resources

Simple theme toggle script:
<script>
  function toggleTheme() {
    // Select the <link> element
    let theme = document.getElementById('LINK-ID');

    // Toggle between NAME1.css and NAME2.css
    if (theme.getAttribute('href') == 'NAME1.css') {
                theme.setAttribute('href', 'NAME2.css');
      } else {
                theme.setAttribute('href', 'NAME1.css');
    }
  }
</script>