JS error in IE7 / IE8 : 'var' has value Null or is not an object

Question

This snippet just makes IE7/IE8 crashes the page throwing error. I don't know why cause on chrome / FF, everything is fine.

The problem seems to be here :

            return event.Date.valueOf() === date.valueOf();

The error is :

Message: 'Date' has value Null or is not an object

What's causing this ? Thanks

EDIT I updated my code here http://jsfiddle.net/Zrz9t/15/

http://stackoverflow.com/questions/801032/null-object-in-javascript — Christian, Apr 11 '11 at 09:40
Updating to jQuery 1.5.2 should resolve your issue. I tried with 1.5.1 in jsFiddle and had no errors in IE9/IE8. — Šime Vidas, Apr 11 '11 at 09:47
I got completely different error messages. jQuery 1.5 has some bugs that occur in IE9. Change to jQuery 1.5.1. — Guffa, Apr 11 '11 at 09:50
I was on jquery 1.5.1 -> updated to 1.5.2 and it didn't fixed the error — sf_tristanb, Apr 11 '11 at 09:54
I've updated my code, you still don't see the error in IE7/8 ? — sf_tristanb, Apr 11 '11 at 09:57

score 2 · Answer 1 · answered Apr 11 '11 at 09:40

2

That script works fine in FF4 and IE8.

However, IE is picky about reserved words. Try renaming "Date" to something else.

answered Apr 11 '11 at 09:40

Udo G

I changed the name of the var (to StartDate) without no result. Will try updating jQuery – sf_tristanb Apr 11 '11 at 09:52
After adding `id="div"` to the HTML code I can click to a yellow cell and (ie. April 13th) and get a 404 error because it tries to load "http://fiddle.jshell.net/_display/Five%20K%20for%20charity". – Udo G Apr 11 '11 at 10:03
Sory, wrong code update, i've put back the alert(event.Title) – sf_tristanb Apr 11 '11 at 10:05
Works fine for me with IE 8.0.7601.17514 64-bit edition after fixing your `
` code to `
` – Udo G Apr 11 '11 at 10:08

score 0 · Answer 2 · answered Apr 11 '11 at 09:46

0

Please check whether the Date is null.when you are trying to get the valueOf a null object it is throwing the error.

answered Apr 11 '11 at 09:46

Ammu

score 0 · Accepted Answer · answered Apr 11 '11 at 11:56

Ok, the problem was the following :

    var events =[
{ Url : "azerty", StartDate : new Date("04/17/2011") } ,
{ Url : "azerty2", StartDate : new Date("04/17/2011") } ,
];

Notice the last comma on the last line (which wasn't present on JsFiddle).

IE was the only one to yell at me for that extra comma.

Problem solved.

score -1 · Answer 4 · answered Apr 11 '11 at 11:36

-1

event is probably a reserved keyword in IE, try changing it to something else.

answered Apr 11 '11 at 11:36

Nishan

4 Answers4