Function hasClass

scripts/sequence.js:460–467

* Does an element have a particular class? * * @param {HTMLElement} element - The element to check * @param {String} name - The name of the class to check for * @returns {Boolean} * @api private

(element, name)

     * @api private
     */
    function hasClass(element, name) {

      if (element === undefined) {
        return;
      }

      return new RegExp('(\\s|^)' + name + '(\\s|$)').test(element.className);
    }

    /**
     * Add a class to an element