Function addClass

third_party/js/qunit/qunit.js:6485–6489

(elem, name)

      return (' ' + elem.className + ' ').indexOf(' ' + name + ' ') >= 0;
    }
    function addClass(elem, name) {
      if (!hasClass(elem, name)) {
        elem.className += (elem.className ? ' ' : '') + name;
      }
    }
    function toggleClass(elem, name, force) {
      if (force || typeof force === 'undefined' && !hasClass(elem, name)) {
        addClass(elem, name);