JS 时间常见单位之间的转换（Date/Moment/格式化/时间戳）

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单位之间的常见转换

1. Moment转string 

引用：

import moment,{Moment} from 'moment/moment';

moment.locale('zh-cn');

 

moment().format('YYYY-MM-DD HH:mm:ss');

moment(1594967587594).format('YYYY-MM-DD');

 

2. Date转string

new Date().toLocaleDateString()

moment(new Date().getTime()).format('YYYY-MM-DD');

 

3. string/int转Date

new Date('2020-7-13')

new Date(1594967587594)

获取时间戳

1. moment转时间戳

与当前相隔的时间戳：

moment("20151010", "YYYYMMDD").fromNow().valueOf() 

明天此时的时间戳：

moment().add('days',1).valueOf() 

获取明日开始的时间戳：

  const opDate = moment();

  const curDay = today.get('date');

  opDate.set('date', curDay + 1);

  opDate.set('hour', 0);

  opDate.set('minute', 0);

  opDate.set('second', 0);

  opDate .valueOf();

2. Date转时间戳

//今天

new Date().toLocaleDateString()

"2020/7/17"

new Date().getTime()

1594967587594

new Date(new Date().toLocaleDateString()).getTime()

1594915200000

 

//本周

new Date().getDay()

5

new Date('2020-7-13').getTime()

1594569600000

new Date(new Date().toLocaleDateString()).getTime()- 1000 * 60 * 60 * 24* (new Date().getDay()-1)

1594569600000

//本月

new Date('2020-7').getTime()

1593532800000

new Date('2020-7-1').getTime()

1593532800000

new Date().getDate()

17

new Date(new Date().toLocaleDateString()).getTime()- 1000 * 60 * 60 * 24* (new Date().getDate()-1)

1593532800000

 

//分步

var today = new Date();

var oneday = 1000 * 60 * 60 * 24;

var todayStamp=new Date(today.toLocaleDateString()).getTime();

var yesterdayStamp = todayStamp - oneday * 1;

var currentWeekStamp= todayStamp - oneday * (today.getDay()-1);

var currentMonthStamp=todayStamp - oneday * (today.getDate()-1);

 

日历-某个月的时间戳范围

        //一个完整日历时间戳
        var oneday = 1000 * 60 * 60 * 24;
        var todayStamp = new Date(day.toLocaleDateString()).getTime();
        var monthFirstDay = todayStamp - oneday * (day.getDate() - 1);
        var monthFirstDayWeekIndex = new Date(monthFirstDay).getDay();
        var calendarFirstDay = monthFirstDay - oneday * (monthFirstDayWeekIndex - 1);
        var monthLastDay = new Date(day.getFullYear(), day.getMonth() + 1, 0);
        var monthLastDayWeekIndex = monthLastDay.getDay();
        var calendarLastDay = monthLastDay.getTime() + (7 - monthLastDayWeekIndex + 1 + (monthFirstDayWeekIndex >= 6 ? 0 : 7)) * oneday;