#50 - Cross-Device Dark Mode v0.1

<!-- 💙 MEMBERSCRIPT #50 HEAD CODE v0.1 💙 CROSS-DEVICE DARK MODE -->
<script> 
  document.addEventListener('DOMContentLoaded', function() {
    const themePreference = localStorage.getItem('themePreference');
    if (themePreference === 'dark') {
      document.body.classList.add('dark');
    }
  });
</script>

<!-- 💙 MEMBERSCRIPT #50 BODY CODE v0.1 💙 CROSS-DEVICE DARK MODE -->
<script>
  document.addEventListener('DOMContentLoaded', function() {
    const darkModeToggle = document.querySelector('[ms-code-dark-mode="toggle"]');
    const bodyElement = document.querySelector('.body');

    // Function to check if theme preference is saved in member JSON
    function checkThemePreference() {
      const memberstack = window.$memberstackDom;
      memberstack.getMemberJSON()
        .then(function(memberData) {
          const themePreference = memberData.data?.themePreference;
          if (themePreference === 'dark') {
            enableDarkMode();
          } else {
            disableDarkMode();
          }
        })
        .catch(function(error) {
          console.error('Error retrieving member data:', error);
        });
    }

    // Function to enable dark mode
    function enableDarkMode() {
      darkModeToggle.classList.add('dark');
      bodyElement.classList.add('dark');
      updateThemePreference('dark');
    }

    // Function to disable dark mode
    function disableDarkMode() {
      darkModeToggle.classList.remove('dark');
      bodyElement.classList.remove('dark');
      updateThemePreference('light');
    }

    // Function to update theme preference in member JSON
    function updateThemePreference(themePreference) {
      const memberstack = window.$memberstackDom;
      memberstack.getMemberJSON()
        .then(function(memberData) {
          memberData.data = memberData.data || {};
          memberData.data.themePreference = themePreference;
          memberstack.updateMemberJSON({ json: memberData.data })
            .then(function() {
              localStorage.setItem('themePreference', themePreference);
            })
            .catch(function(error) {
              console.error('Error updating member data:', error);
            });
        })
        .catch(function(error) {
          console.error('Error retrieving member data:', error);
        });
    }

    // Event listener for dark mode toggle
    darkModeToggle.addEventListener('click', function() {
      if (darkModeToggle.classList.contains('dark')) {
        disableDarkMode();
      } else {
        enableDarkMode();
      }
    });

    // Apply transition duration and timing to all elements
    const transitionDuration = '0.0s';
    const transitionTiming = 'ease';
    const elementsToTransition = [darkModeToggle, bodyElement];
    elementsToTransition.forEach(function(element) {
      element.style.transitionDuration = transitionDuration;
      element.style.transitionTimingFunction = transitionTiming;
    });

    // Check theme preference on page load
    const savedThemePreference = localStorage.getItem('themePreference');
    if (savedThemePreference === 'dark') {
      enableDarkMode();
    } else {
      disableDarkMode();
    }
    checkThemePreference();
  });
</script>