如何得到上个月的最后一天从日期？

我试图获取上个月的最后一天，使用:

 var dateFrom = moment(dateFrom).subtract(1, 'months').format('YYYY-MM-DD');

地点:

dateFrom = 2014-11-30

但是用过之后

subtract(1, 'months')

它会返回日期

DATE_FROM: "2014-10-30"

但是十月的最后一天是三十一。

请问我该怎么解决？

非常感谢你的帮助。

99473 次浏览
小开
最佳答案

Simply add a endOf('month') to your calls:

var dateFrom = moment(dateFrom).subtract(1,'months').endOf('month').format('YYYY-MM-DD');

http://jsfiddle.net/r42jg/327/

小开

An even easier solution would be to use moment.date(0). the .date() function takes the 1 to n day of the current month, however, passing a zero or negative number will yield a dates in the previous month.

For example if current date is February 3rd:

var _date = moment(); // 2018-02-03 (current day)
var _date2 = moment().date(0) // 2018-01-31 (start of current month minus 1 day)
var _date3 = moment().date(4) // 2018-02-04 (4th day of current month)
var _date4 = moment().date(-4) // 2018-01-27 (start of current month minus 5 days)


console.log(_date.format("YYYY-MM-DD"));
console.log(_date2.format("YYYY-MM-DD"));
console.log(_date3.format("YYYY-MM-DD"));
console.log(_date4.format("YYYY-MM-DD"));
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.20.1/moment.js"></script>

小开

Last month's First date and last month's last date from the current date basis. The Format of the date changes depending upon. (DD-MM-YYYY) 

console.log("last month first date");
const lastmonthlastdate=moment().subtract(1, 'months').startOf('month').format('DD-MM-YYYY')
console.log(lastmonthlastdate);


console.log("lastmonth last date");
const lastmonthfirstdate=moment().subtract(1, 'months').endOf('month').format('DD-MM-YYYY')
console.log(lastmonthfirstdate);
小开

You can get the first day of the month then subtract 1 day to get the last day of the previous month.

const monthyear = moment().format('YYYY-MM')
const firstDay = moment(monthyear + "-01").format("YYYY-MM-DD");
// Subtract 1 day to get the end of the previous month
const dateTo = moment(firstDay).subtract('1', 'days').format("YYYY-MM-DD");
小开

moment().subtract(1, 'months').endOf('month').format('YYYY-MM-DD')


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