Check if a Cookie exists or not?

Question

I am trying to find out if a cookie exists or not, if it doesn't I want to create it. I am doing this in Internet Explorer and its stopping at if(readCookie(count) == null) of the code below.

if(readCookie("count") == null)
{
    createCookie("count", 0, 10);
}


function readCookie(name) 
{
    var nameEQ = name + "=";
    var ca = document.cookie.split(';');
    for(var i=0;i < ca.length;i++) 
    {
        var c = ca[i];
        while (c.charAt(0)==' ') c = c.substring(1,c.length);
        if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
    }
    return null;
}

What am I doing wrong here?

Possible duplicate of [check cookie if cookie exists](http://stackoverflow.com/questions/5968196/check-cookie-if-cookie-exists) (or at least that might have some code you can use). — apsillers, May 08 '12 at 18:57

score 1 · Answer 1 · answered May 08 '12 at 18:52

1

if( $.cookie('query') == null ) { 
    createCookie("count", 0, 10);
}

answered May 08 '12 at 18:52

Farhan Ahmad

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Probably an old post now but (if I understand you correctly) why does it need a jQuery tag inparticular, the plugin allows users to use the $ symbol in place jQuery a bit like PrototypeJS's selectors. – DarkMantis Jun 20 '12 at 11:31

score 0 · Accepted Answer · edited Jul 12 '17 at 15:03

0

Try using undefined instead of null

See the following link:

http://jsfiddle.net/sssonline2/D38WM/1/

Tested on both IE and FireFox

Here's a Stack Overflow link for more info:

typeof !== "undefined" vs. != null

edited Jul 12 '17 at 15:03

Howdy_McGee

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answered May 08 '12 at 19:00

shareef

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Check if a Cookie exists or not?

2 Answers2