varmoment=require("moment");// var d = moment("7/9/2019 09:46:33", "M/D/YYYY HH:mm:ss");// print(d);// var duration = moment.duration("07:13:08");// print(duration);// print(d.subtract(duration));// 求时差// var t1 = moment("2019-07-16 09:08:08");// var t2 = moment("2019-07-16 09:07:07");// print(t1.diff(t2, 'minutes'));// var str = "2019-07-18 21:04:00";// var d = moment(d)// var e = d.startOf('day');// print(d)// Duration求和// var duration1 = moment.duration("01:05:08");// var duration2 = moment.duration("02:15:08");// var result = duration1.add(duration2);// print(duration1, duration2, result);// 求时间的差值varstart_time="2019-07-08 23:45:09";varend_time="2019-07-09 00:00:00";varresult=moment(end_time).diff(moment(start_time),'s');print(result);// 取整点// var start_time = "2019-07-08 23:45:09";// var result = moment(start_time).startOf('H').format("YYYY-MM-DD HH:mm:ss");// print(result);