MomentJS - 如何从上个月的最后一天获得？

I'm trying to get last day of the previous month using:

我正在尝试使用以下方法获取上个月的最后一天:

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

Where:

dateFrom = 2014-11-30

But after using

但使用后

subtract(1, 'months')

it returns date

它返回日期

DATE_FROM: "2014-10-30"

But last day of the 10'th month is 31.

但是10月的最后一天是31。

How can I solve i please?

我该怎么解决?

Many thanks for any help.

非常感谢任何帮助。

2 个解决方案

#1

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

只需在您的通话中添加endOf('月')即可:

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

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

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

#2

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.

更简单的解决方案是使用moment.date(0)。 .date()函数占用当前月份的1到n天,但是,传递零或负数将产生上个月的日期。

For example if current date is February 3rd:

例如,如果当前日期是2月3日:

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>

#1