/// <summary>
 /// ClassList of the element.
 /// See also https://developer.mozilla.org/en-US/docs/Web/API/Element/classList
 /// </summary>
 /// <param name="handle">An <see cref="ElementHandle"/></param>
 /// <returns>The element <c>classList</c></returns>
 public static string[] ClassList(this ElementHandle handle)
 {
     return(handle.ClassListAsync().Result());
 }