MediaWiki:Common.js: Difference between revisions

Revision as of 00:08, 14 April 2024

(function () {
  var sidebarId = 'mw-navigation';

  function saveSidebarScrollPosition() {
    var scrollPosition = document.getElementById(sidebarId).scrollTop;
    sessionStorage.setItem('sidebarScrollPosition', scrollPosition);
  }

  function restoreSidebarScrollPosition() {
    var scrollPosition = sessionStorage.getItem('sidebarScrollPosition');
    if (scrollPosition !== null) {
      document.getElementById(sidebarId).scrollTop = parseInt(scrollPosition);
    }
  }

  // Enable manual scroll restoration
  if ('scrollRestoration' in history) {
    history.scrollRestoration = 'manual';
  }

  // Save scroll position before unloading the page
  window.addEventListener('beforeunload', saveSidebarScrollPosition);

  // Restore scroll position when the page is loaded
  window.addEventListener('load', restoreSidebarScrollPosition);

  // Save scroll position when clicking on sidebar links or headings
  var sidebarLinks = document.querySelectorAll('#' + sidebarId + ' a');
  sidebarLinks.forEach(function (link) {
    link.addEventListener('click', saveSidebarScrollPosition);
  });

  var sidebarHeadings = document.querySelectorAll('#' + sidebarId + ' .sidebar-heading');
  sidebarHeadings.forEach(function (heading) {
    heading.addEventListener('click', saveSidebarScrollPosition);
  });
})();