Next.js Cookies Guide: Pros, Cons, and Practical Implementation
Blog post from Prismic
Cookies, small data pieces stored on a user's device by web browsers, offer significant benefits such as customization, session management, and targeted advertising, but also raise privacy concerns due to their use in tracking. The widespread use of tracking cookies has led to privacy laws like the GDPR, which require opt-in consent. Cookies are vital for session management, enabling authentication in apps without standalone databases, though they pose security risks like XSS and CSRF if improperly implemented. They can be created on both client and server sides but are always stored in the user's browser, with httpOnly cookies being inaccessible to client-side operations to reduce security threats. The text also provides a tutorial on using cookies in a Next.js App Router project to create a theme switcher application, demonstrating how to get, set, and delete cookies for user preference storage, alongside the use of Tailwind CSS for styling.
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