How do I implement logout functionality using JWT in Express.js?

How do I implement logout functionality using JWT in Express.js?

To implement logout functionality with JWT in Express.js, you can follow these steps: 1. Invalidate the token on the server side. 2. Optionally, store the token in a blacklist. 3. Remove the token from the client side.

What do you mean by invalidating the token?

Invalidating the token means marking it as no longer valid. This can be done by adding it to a blacklist or changing the secret key used to sign the tokens.

How can I store the token in a blacklist?

You can create a simple in-memory array or use a database to store blacklisted tokens along with their expiration times.

Is there a way to automatically remove expired tokens from the blacklist?

Yes, you can set up a scheduled job to periodically check and remove expired tokens from the blacklist.