code/frontpage/assets/js/scroll-lock.js


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// Adds scroll position lock for default docs sidebar

if (document.querySelector('#sidebar-default') !== null) {
  let sidebar = document.getElementById('sidebar-default');

  let pos = sessionStorage.getItem('sidebar-scroll');
  if (pos !== null) {
      sidebar.scrollTop = parseInt(pos, 10);
  }

  window.addEventListener('beforeunload', () => {
      sessionStorage.setItem('sidebar-scroll', sidebar.scrollTop);
  });
}