MediaWiki:Common.js

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

// Collapse by default the TOC on opening of pages 
// The enclosed code runs only after the page has been loaded and parsed.
window.addEventListener('DOMContentLoaded', function() {
  try {
    // Detect whether the page's TOC is being displayed.
    if (document.getElementById('toc').getElementsByTagName('ul')[0].style.display != 'none') {
      // Use MW's toggleToc() to hide TOC, change "hide/show" link text, and set cookie.
      toggleToc();
    }
  } catch (exception) {
    // Probably this page doesn't have a TOC, ignore the exception to prevent console clutter.
  }
}, false);