NextJS has announced the release of version 14, and there are several significant changes to note. One of the key changes is the support for Server Actions, which allows developers to write server-side code in the same file as the client-side code, without the need to separate it into the /api folder as before.
Another important feature is the transition to using the Turbopack compiler. Although the testing suite is not yet fully complete, it is already more than 90% finished. Furthermore, the speed of the next dev command has significantly improved.
In this version, NodeJS 18.17 and above are required. There are also some API adjustments, but the most notable addition is the availability of online tutorials for learning NextJS.
TLDR: NextJS version 14 introduces support for Server Actions, allowing developers to write server-side code alongside client-side code. It also transitions to the use of the Turbopack compiler, resulting in faster development speeds. NodeJS 18.17 or higher is now required, and there are additional API adjustments. Overall, NextJS offers online tutorials for learning the framework.