whole_func_string: function (el) {
    var className = el.className
    var listClass = className.split(' ')
    this.classList = listClass
    this.el = el
  }
func_code_string: function (el) {
    var className = el.className
    var listClass = className.split(' ')
    this.classList = listClass
    this.el = el
  }
func_documentation_string: new object function for unsupport classList