MadokoReferenceChinese/reference.js at master · HHpetra/MadokoReferenceChinese · GitHub

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function initTOC() {
  var toc = document.getElementById('toc');
  if (toc == null) return;
  var tocHeader = document.getElementById('toc-header');
  if (tocHeader== null) return;

  var tocToggle = document.getElementById('toc-toggle');
  if (tocToggle==null) {
    tocHeader.innerHTML = "<span id='toc-toggle'></span>" + tocHeader.innerHTML;
    tocToggle = document.getElementById('toc-toggle');
  }
  if (tocToggle==null) return;

  function showToc() {
    toc.style.display = 'block';
    if (tocToggle){
      tocToggle.innerHTML = '&#x25BC;'
      tocToggle.style.fontSize = 'medium'
    }
  }
  function hideToc() {
    toc.style.display = 'none';
    if (tocToggle) {
      tocToggle.innerHTML = '&#x25B6;';
      tocToggle.style.fontSize = 'medium';
    }
  }
  function switchToc() {
    (toc.style.display != 'none' ? hideToc() : showToc());
  }

  if (tocHeader) {
  	tocHeader.onclick = switchToc;
  	tocHeader.style.cursor = "pointer";
  }
  hideToc()
}

 document.addEventListener("DOMContentLoaded", function(event) {
   initTOC();
 });