var moment = 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
var start_time = "2019-07-08 23:45:09";
var end_time = "2019-07-09 00:00:00";
var result = 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);