I am in "foo.bar", I am setting the cookie with key "abc" for the domain ".bar"

So far so good.

Now, I am still in "foo.bar" but I want to delete the cookie with key "abc" from domain ".bar"

How do I do that? I am doing JavaScript.

I am in "foo.bar.", I am setting the cookie with key "abc" for the domain ".bar."

So far so good.

Now, I am still in "foo.bar." but I want to delete the cookie with key "abc" from domain ".bar."

How do I do that? I am doing JavaScript.

• javascript
• cookies

• 2 As far as I know, this is only possible in PHP. I may be wrong. Also, deleting a cookie is just setting it to an expiration date before the current time. – SeinopSys Commented Dec 26, 2012 at 23:26
• 3 How did you set the cookie? – mutil Commented Dec 26, 2012 at 23:29

3 Answers 3

You need to explicitly provide the domain

document.cookie = 'abc=' + ";expires=Thu, 01 Jan 1970 00:00:01 GMT ;domain=.foo.;path=/";

If you use jquery.cookie, you specify the domain and path:

$.removeCookie('cookie_name', {domain: '.food', path:'/'});

While counter-intuitive, I've found the behavior seen by OP to be expected in both Chrome and Firefox. It's possible to create a cookie at a parent domain from a subdomain, but not possible to delete it afterward. This answer to another post describes this in a little more detail.