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So, what is NextJS and why would you use it?

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Well, the answer is NextJS is a React framework,

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so it builds up on React.js,

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and you therefore, of course, might wonder,

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why do we need it?

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After all, React.js is already a library itself.

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Why do we need another framework

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that builds up on React.js?

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Well, because NextJS is a full stack React framework,

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so it simplifies the process

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of building full stack apps with React.

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And that's a huge thing,

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because recently, over the last couple of months and years,

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there's been a trend to go back

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to building full stack applications

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instead of just client-side single page applications.

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And indeed, the React library itself

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added more and more features

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that make it a bit easier to run React on the server

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and render components on the server specifically.

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But that's typically not all you need

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if you want to build a full stack application.

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Instead, if you wanna build

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a complete, feature-rich full stack application,

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you also need help with handling form submissions,

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fetching data, authenticating users,

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and a lot of other things.

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And that's exactly what NextJS gives you.

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So, it builds up on React

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and then vastly simplifies the process

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of building full stack applications with React.

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Therefore, in order to use NextJS,

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and in order to build applications with NextJS,

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you need a solid React foundation.

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You need to know React,

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because you'll still be building components and so on.

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But then NextJS allows you to take your React skills

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to the next level, so to say,

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and it allows you

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to build full stack applications with React.

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And that's exactly what we'll do

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over the next couple of hours.