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I am building a web app and have noticed that other web apps (gmail in particular) use cookies and it logs you out if you don’t have cookies enabled. Any idea what these cookies are used for that they are so crucial? Are there any common uses for cookies in web apps?
It enables the server to maintain a client-specific state across requests (session) in the server side. It also enables JavaScript to maintain a client-specific state across requests in the client side without need for server interaction.