whole_func_string: function createEvent(data = null) {
      let isDefaultPrevented = false;
  
      // 返回对象
      return Object.create(data, {
          defaultPrevented: {
              get() {
                  return isDefaultPrevented;
              }
          },
          preventDefault: {
              value: () => {
                  isDefaultPrevented = true;
              }
          }
      });
  }
func_code_string: function createEvent(data = null) {
      let isDefaultPrevented = false;
  
      // 返回对象
      return Object.create(data, {
          defaultPrevented: {
              get() {
                  return isDefaultPrevented;
              }
          },
          preventDefault: {
              value: () => {
                  isDefaultPrevented = true;
              }
          }
      });
  }
func_documentation_string: ****************************************
  创建事件对象
  ****************************************