Summary

We made it through a short and atypical introduction to the world’s most popular user interface library – React.js. I tried to cover the absolute basics and point the reader in a certain direction, rather than trying to elaborate on topics that require separate chapters or entire books. I have covered the topics that I believe are enough to get started.

We have seen what JSX is and why it is so convenient for developers. We introduced the basic building blocks of React, functional components, and the basic rules that must be followed when designing them. I have introduced two fundamental React Hooks that, when combined, allow you to begin building basic user interfaces, maintain and change state in the components and interact with external APIs.

Finally, I mentioned some of the React libraries that will make your life easier when developing custom applications – they all have excellent documentation and are updated frequently, so covering them in...