js 时间戳获取

<script>
        // js获取当前时间戳（三种方式都可以）
      let time1 = new Date().getTime();
      let time2 = Date.now();
      let time3 = new Date().valueOf();  //valueOf返回 Date 对象的原始值
      console.log('time1：', time1)  //1687831117794
      console.log('time2：', time2)  //1687831117794
      console.log('time3：', time3)  //1687831117794 

       //将时间戳格式转换成年月日时分秒
       var date = new Date(time2);
      var Y = date.getFullYear() + '-';
      var M = (date.getMonth() + 1 < 10 ? '0' + (date.getMonth() + 1) : date.getMonth() + 1) + '-';
      var D = (date.getDate() < 10 ? '0' + (date.getDate()) : date.getDate()) + ' ';

      var h = (date.getHours() < 10 ? '0' + (date.getHours()) : date.getHours()) + ':';
      var m = (date.getMinutes() < 10 ? '0' + (date.getMinutes()) : date.getMinutes()) + ':';
      var s = (date.getSeconds() < 10 ? '0' + (date.getSeconds()) : date.getSeconds());
      var strDate = Y + M + D + h + m + s;
      console.log('输出内容:', strDate) //输出内容: 2023-06-27 09:59:41
    </script>