javascript - JQuery Cookies Creation...Check if cookie already has a value - Stack Overflow

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I am using this code to create a cookie with JQuery:

$.cookie('MyCookieName', 'myValueHere');

It works fine but as I have the value assign to a random number it's generating a new one every reload.

What I need to do is check if cookie has a value and if it's not empty then don't create a new one or generate any new value.

I am using this code to create a cookie with JQuery:

$.cookie('MyCookieName', 'myValueHere');

It works fine but as I have the value assign to a random number it's generating a new one every reload.

What I need to do is check if cookie has a value and if it's not empty then don't create a new one or generate any new value.

• javascript
• jquery

Share Improve this question Follow edited Feb 3, 2012 at 11:43 Manse 38.1k1111 gold badges8686 silver badges111111 bronze badges asked Feb 3, 2012 at 11:40 Satch3000Satch3000 49.5k9090 gold badges225225 silver badges349349 bronze badges

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3 Answers 3

Sorted by: Reset to default 2

if ($.cookie('MyCookieName') == null) {
    $.cookie('MyCookieName','MyCookieValue');
}

You can also add expire time and path in options.

$.cookie('MyCookieName','MyCookieValue', { path: '[path here]', expires: [days] });

Then you can be sure, that cookies won't be deleted.

Try checking for a value already set in an if statement like this

if($.cookie('MyCookieName') == null) {
   //it doesnt exist
} else {
   // do something else maybe
}

Thats if your plugin for example this one returns null when the cookie is not found

to avoid misunderstandings it's better to use exact parison:

if($.cookie('MyCookieName') === null) { //some stuff }

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