使用moment js将13位时间代码转换为日期和时间戳，并得到它们之间的差异

<script src="https://cdn.jsdelivr.net/momentjs/latest/moment.min.js"></script>

var date = moment(1629876543210);

var dateString = date.format('YYYY-MM-DD');
var timestamp = date.valueOf();

var diff = date.diff(anotherDate, 'milliseconds');

<script src="https://cdn.jsdelivr.net/momentjs/latest/moment.min.js"></script>
<script>
  var timestamp = 1629876543210;
  var date = moment(timestamp);
  var dateString = date.format('YYYY-MM-DD');
  var timestamp = date.valueOf();

  var anotherDate = moment(1629876543211);
  var diff = date.diff(anotherDate, 'milliseconds');

  console.log('日期：', dateString);
  console.log('时间戳：', timestamp);
  console.log('两个日期之间的差异：', diff, '毫秒');
</script>