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Editorial Team
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Asked: 2026-05-30T00:36:35+00:00

As the question says can you find out if a cookie exists within Javascript

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As the question says can you find out if a cookie exists within Javascript if it is a HttpOnly? I don’t need to access the information inside of it, just know it has one.

A little more information on the situation is that there was originally a web server which used a cookie as an authentication token, and it was set to httponly as it was not used by the client so it added to the security.

However now there is a change needed where the client needs to know if it has the cookie (as the site can work without the user being logged in, but if they are logged in (the auth cookie would exist) the site needs to display certain things and hide others.

There are other security precautions in place on the web server so there is no harm in the scenario where the client has an incorrect auth cookie, but the site makes it look like they are logged in, as it would delete the cookie and reject the user.

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1 Answer

  1. Editorial Team

    No. And see Rob’s comments below.

    See this, which you probably already saw – http://en.wikipedia.org/wiki/HTTP_cookie#Secure_and_HttpOnly

    An HttpOnly cookie is not accessible via non-HTTP methods, such as
    calls via JavaScript (e.g., referencing “document.cookie”)…

    Edit: Removed undefined response, I wrote a script that you may not be using 🙂

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