Javascript Date Object from string in form 'HH-MM'

Question

Hey, just wondering how to convert an HH:MM string into a javascript Date object. I have tried new Date(string); and myDate.setTime() but to no avail.

A side question could be: How to convert a string in HH:MM into milliseconds from Jan 1, 1970.

Thanks for your help in advance.

KooiInc · Accepted Answer · 2010-12-02 08:21:51Z

9

How about something like:

//using timestr '10:33:21', could also be '10-33-21'
var dat = new Date, time = timestr.split(/\:|\-/g);
dat.setHours(time[0]);
dat.setMinutes(time[1]);

answered Dec 2, 2010 at 8:21

KooiInc

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3 Comments

EvilMM Over a year ago

In my opinion, this is too "manual". There are parsing methods that can do the work.

KooiInc Over a year ago

As always [in javascript], there are many roads leading to Rome. This is one of them. I think it's usefull to know what one is doing before switching to more abstracted frameworks or libraries. It's a matter of taste I suppose.

ewizard Over a year ago

what about AM/PM?

EvilMM · Accepted Answer · 2010-12-02 08:17:30Z

4

in JavaScript, I'm using the datejs library. http://www.datejs.com/ If you include this library, you have a function called "parseExact" and you could use it like this:

var dateString = "10-12";
var date = new Date.parseExact(dateString, "hh-mm");

To get the miliseconds, you can download the file time.js from http://code.google.com/p/datejs/source/browse/trunk/#trunk/src. Then you have a function getTotalMilliseconds() you can use:

var mSeconds = date.getTotalMilliseconds();

I hope this will help a little bit.

answered Dec 2, 2010 at 8:17

EvilMM

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3 Comments

Fred Over a year ago

Hey, thanks for the quick reply. Sorry I can't vote you up yet (limit reached) but I now realise that my question was wrong, I meant HH:MM. If your answer still works for it, well then I'm happy.

EvilMM Over a year ago

This function parses any datetime-string. View some examples here: datejs.com/test/parseExact/index.html. And this functions also parses Date.parseExact(dateString, "HH-MM"). In my option it is more safety and elegant to use a parser-method instead of doing it manual.

Fred Over a year ago

P.S. This helps a lot. And thanks for the very comprehensive answer.

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