To get started with Next.js, you need to install a couple of dependencies on your machine.
First of all, you need to install Node.js and npm. Please refer to this blog post if you need a detailed guide for installing them: https://www.nodejsdesignpatterns.com/blog/5-ways-to-install-node-js.
If you don't want to install Node.js on your local machine, some online platforms will let you follow the code examples in this book using an online IDE for free, such as https://codesandbox.io and https://repl.it.
Once you have both Node.js and npm installed (or you're using an online environment), you'll only need to follow the instructions displayed in each section of this book for installing the required project-specific dependencies using npm.
You can find complete code examples on GitHub under the following repository: https://github.com/PacktPublishing/Real-World-Next.js. Feel free to fork, clone, and edit this repository for any experimentation with Next.js.