Compare Date & Time Javascript

Question

Ok I cant get my head round this, ive looked at so many posts on SF but cant figure it out.

I need to compare two dates & times, start and end. If end is great then alert();

Works in Chrome but not IE(9) (format is: 01-Jan-2013 10:00)

var stDate = new Date(date +" "+ start);
var enDate = new Date(dateEnd + " "+ end);

        if ( Date.parse ( enDate ) > Date.parse ( stDate ) ) {
            alert('on no');
        }

Please help, im stuck...

You should check out [moment.js](http://momentjs.com). It handles all the cross-browser Date fuss for you! — Casey Foster, Jan 11 '13 at 20:54
i'm wondering if the Timezones have anything to do with this? — jdavid.net, Jan 11 '13 at 21:07

score 3 · Accepted Answer · answered Jan 11 '13 at 22:10

Just make a custom parser, it's done faster than trying to figure how different browsers treat various time string formats:

function parse(datestring){
    var months = {"Jan":0,"Feb":1,"Mar":2,"Apr":3,"May":4,"Jun":5,"Jul":6,"Aug":7,"Sep":8,"Oct":9,"Nov":10,"Dec":11}
    var timearray = datestring.split(/[\-\ \:]/g)
    return Date.UTC(timearray[2],months[timearray[1]],timearray[0],timearray[3],timearray[4])
}

This returns Unix time in milliseconds, and it use UTC, thus avoiding complications from the missing hour of daylight savings time. It works with the format you specified, but does not validate input.

score 2 · Answer 2 · answered Jan 11 '13 at 20:52

2

if ( enDate.getTime() > stDate.getTime() ) {
    alert('oh no');
}

Pushing to number (+enDate) is the same as using the .getTime() method:

if ( +enDate > +stDate ) {
    alert('oh no');
}

answered Jan 11 '13 at 20:52

Andreas Louv

46,145
13
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123

HMarioD · Answer 3 · 2013-01-11T21:33:00.343

0

var stDate = new Date(date +" "+ start);
var enDate = new Date(dateEnd + " "+ end);

        if ( enDate.getTime() > stDate.getTime() ) {
            alert('on no');
        }

To create a Date object:

var d = new Date();
var d = new Date(milliseconds);
var d = new Date(dateString);
var d = new Date(year, month, day, hours, minutes, seconds, milliseconds);

getTime() Return the number of milliseconds since 1970/01/01

edited Jan 11 '13 at 21:33

answered Jan 11 '13 at 20:57

HMarioD

842
10
18

@D-W getTime() works for all browsers. http://www.w3schools.com/jsref/jsref_settime.asp – HMarioD Jan 11 '13 at 21:23
May be you have some problem with your variables(date, start, dateEnd or end) try create dates like that new Date("2013/01/03 12:30"); and new Date("2013/01/03 12:31"); and see if working. – HMarioD Jan 11 '13 at 21:29

Compare Date & Time Javascript

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