code: function getVersion() {
      let d = new Date();
  
      return ''
          + d.getFullYear()
          + padding(d.getMonth() + 1)
          + padding(d.getDate())
          + padding(d.getHours())
          + padding(d.getMinutes())
          + padding(d.getSeconds());
  }
docs: 获取时间戳版本号
  
  @return {string} 版本号