js 日期 时间 转换成时间戳

function transdate (time) {
  var date = new Date();
  date.setFullYear(time.substring(0, 4));
  date.setMonth(time.substring(5, 7) - 1);
  date.setDate(time.substring(8, 10));
  date.setHours(time.substring(11, 13));
  date.setMinutes(time.substring(14, 16));
  date.setSeconds(time.substring(17, 19));
  return Date.parse(date) / 1000;
}
transdate('2020-02-22 22:22:22')

计算两个时间差点击此处