Common.js

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/* Any JavaScript here will be loaded for all users on every page load. */

if ( mw.config.get( 'wgCanonicalSpecialPageName' ) === 'Watchlist' ) {
    document.body.classList.add( 'mw-rcfilters-ui-initialized' );
}

function copyToClipboard(element) {
  var $temp = $("<input>");
  $("body").append($temp);
  $temp.val($(element).text()).select();
  document.execCommand("copy");
  $temp.remove();
}

var activeElement = $('#bs-book-tree-nav').find( '.mws-tree-item.acitve' );
if ( $( activeElement.parent()).hasClass( 'mws-tree-item-children') === false) {
	var $expandedElements = $('#bs-book-tree-nav').find( '.mws-tree-expander.expanded' );
	for ( var i = 0; i < $expandedElements.length; i++) {
		var expander = $expandedElements[i];
		expander.click();
	}
}

var toc, toggleLink;
try {
  toc = document.getElementById('toc').getElementsByTagName('ul')[0];
  toggleLink = document.getElementById('toctogglecheckbox');
  // if (tocIsHidden()) {
  toggleToc();
  // }
} catch (error) {
  console.log('erred', error);
}
function tocIsHidden () {
    return !toc || !toggleLink || window.getComputedStyle(toc).display !== 'block';
}

function toggleToc() {
  var hidden = tocIsHidden();
  if (hidden && document.cookie.indexOf('hidetoc=0') > -1) {
    toggleLink.click();
    // changeText(toggleLink, tocShowText);
    // toc.style.display = 'none';
  } else if (!hidden && document.cookie.indexOf('hidetoc=1') > -1) {
    toggleLink.click();
    // changeText(toggleLink, tocHideText);
    // toc.style.display = 'block';
  }
}
toggleLink && toggleLink.addEventListener('click', function () {
  var isHidden = tocIsHidden();
  document.cookie = isHidden
    ? "hidetoc=1"
    : "hidetoc=0";
});