Function addClass

static/nprogress/nprogress.js:429–437

* (Internal) Adds a class to an element.

(element, name)

   */

  function addClass(element, name) {
    var oldList = classList(element),
        newList = oldList + name;

    if (hasClass(oldList, name)) return; 

    // Trim the opening space.
    element.className = newList.substring(1);
  }

  /**
   * (Internal) Removes a class from an element.