As your web projects grow larger and more complicated, you will find
an increasing need to keep track of your users. Even if you aren’t
offering logins and passwords, you will still often find a need to store
details about a user’s current session and possibly also recognize them
when they return to your site.
Several technologies support this kind of interaction, ranging from
simple browser cookies to session handling and HTTP authentication.
Between them, they offer the opportunity for you to configure your site to
your users’ preferences and ensure a smooth and enjoyable transition
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