Moment.js：日期之间的日期

Question

I'm trying to detect with Moment.js if a given date is between two dates. Since version 2.0.0, Tim added isBefore() and isAfter() for date comparison.

Since there's no isBetween() method, I thought this would work:

var date = moment("15/02/2013", "DD/MM/YYYY");
var startDate = moment("12/01/2013", "DD/MM/YYYY");
var endDate = moment("15/01/2013", "DD/MM/YYYY");


if (date.isBefore(endDate) && date.isAfter(startDate) || (date.isSame(startDate) || date.isSame(endDate)) ) { alert("Yay!"); } else { alert("Nay! :("); } 

I'm convinced there's got to be a better way to do this. Any ideas?

Answer 1

In versions 2.9+ there is an isBetween function, but it's exclusive:

var compareDate = moment("15/02/2013", "DD/MM/YYYY");
var startDate   = moment("12/01/2013", "DD/MM/YYYY");
var endDate     = moment("15/01/2013", "DD/MM/YYYY");

// omitting the optional third parameter, 'units'
compareDate.isBetween(startDate, endDate); //false in this case

There is an inclusive workaround ...
x.isBetween(a, b) || x.isSame(a) || x.isSame(b)

... which is logically equivalent to
!(x.isBefore(a) || x.isAfter(b))

In version 2.13 the isBetween function has a fourth optional parameter, inclusivity .

Use it like this:

target.isBetween(start, finish, 'days', '()') // default exclusive
target.isBetween(start, finish, 'days', '(]') // right inclusive
target.isBetween(start, finish, 'days', '[)') // left inclusive
target.isBetween(start, finish, 'days', '[]') // all inclusive

More units to consider: years, months, days, hours, minutes, seconds, milliseconds

Note: units are still optional. Use null as the third argument to disregard units in which case milliseconds is the default granularity.

Visit the Official Docs

Answer 2

You can use one of the moment plugin -> moment-range to deal with date range:

var startDate = new Date(2013, 1, 12)
  , endDate   = new Date(2013, 1, 15)
  , date  = new Date(2013, 2, 15)
  , range = moment().range(startDate, endDate);

range.contains(date); // false

Answer 3

You can use

moment().isSameOrBefore(Moment|String|Number|Date|Array);
moment().isSameOrAfter(Moment|String|Number|Date|Array);

or

moment().isBetween(moment-like, moment-like);

See here : http://momentjs.com/docs/#/query/

Answer 4

I do believe that

if (startDate <= date && date <= endDate) {
  alert("Yay");
} else {
  alert("Nay! :("); 
}

works too...

Answer 5

Good news everyone, there's an isBetween function! Update your library ;)

http://momentjs.com/docs/#/query/is-between/

Answer 6

Please use the 4th parameter of moment.isBetween function (inclusivity). Example:

var startDate = moment("15/02/2013", "DD/MM/YYYY");
var endDate = moment("20/02/2013", "DD/MM/YYYY");

var testDate = moment("15/02/2013", "DD/MM/YYYY");

testDate.isBetween(startDate, endDate, 'days', true); // will return true
testDate.isBetween(startDate, endDate, 'days', false); // will return false

Answer 7

if (date.isBefore(endDate) 
 && date.isAfter(startDate) 
 || (date.isSame(startDate) || date.isSame(endDate))

is logically the same as

if (!(date.isBefore(startDate) || date.isAfter(endDate)))

which saves you a couple of lines of code and (in some cases) method calls.

Might be easier than pulling in a whole plugin if you only want to do this once or twice.

Answer 8

As Per documentation of moment js,

There is Precise Range plugin, written by Rob Dawson, can be used to display exact, human-readable representations of date/time ranges, url : http://codebox.org.uk/pages/moment-date-range-plugin

moment("2014-01-01 12:00:00").preciseDiff("2015-03-04 16:05:06");
// 1 year 2 months 3 days 4 hours 5 minutes 6 seconds

moment.preciseDiff("2014-01-01 12:00:00", "2014-04-20 12:00:00");
// 3 months 19 days