About the Statelessness of HTTP

HTTP is a stateless protocol, meaning that it does not store persistent data across requests. However, web technologies provide ways to work around this:

• If you want to store a value across requests in the browser, you can use cookies, localStorage, or sessionStorage.
• If you want to store a value across requests on the server, you can use a database, cache, user sessions, temporary files, Redis storage, Elasticsearch documents, and several other options.
• User sessions depend on a session ID cookie, which is issued by the server to the browser once and then sent back by the browser with every subsequent request.