Function hasClass

third_party/js/qunit/qunit.js:6482–6484

(elem, name)

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