Book Image

React Key Concepts

By : Maximilian Schwarzmüller
Book Image

React Key Concepts

By: Maximilian Schwarzmüller

Overview of this book

As the most popular JavaScript library for building modern, interactive user interfaces, React is an in-demand framework that’ll bring real value to your career or next project. But like any technology, learning React can be tricky, and finding the right teacher can make things a whole lot easier. Maximilian Schwarzmüller is a bestselling instructor who has helped over two million students worldwide learn how to code, and his latest React video course (React — The Complete Guide) has over six hundred thousand students on Udemy. Max has written this quick-start reference to help you get to grips with the world of React programming. Simple explanations, relevant examples, and a clear, concise approach make this fast-paced guide the ideal resource for busy developers. This book distills the core concepts of React and draws together its key features with neat summaries, thus perfectly complementing other in-depth teaching resources. So, whether you've just finished Max’s React video course and are looking for a handy reference tool, or you've been using a variety of other learning materials and now need a single study guide to bring everything together, this is the ideal companion to support you through your next React projects. Plus, it's fully up to date for React 18, so you can be sure you’re ready to go with the latest version.
Table of Contents (16 chapters)


In the previous chapters, you learned how to build UIs with the help of React components. You also learned about props—a concept and feature that enables React developers to build and reuse configurable components.

These are all important React features and building blocks, but with these features alone, you would only be able to build static React apps (that is, web apps that never change). You would not be able to change or update the content on the screen if you only had access to those features. You also would not be able to react to any user events and update the UI in response to such events (for instance, to show an overlay window upon a button click).

Put in other words, you would not be able to build real websites and web applications if you were limited to just components and props.

Therefore, in this chapter, a brand-new concept is introduced: state. State is a React feature that allows developers to update internal data and trigger a UI update...