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)

Outputting Dynamic Content

Thus far, in all these examples, the content that was returned was static. It was content like <p>Hello World!</p>—which of course is content that never changes. It will always output a paragraph that says, 'Hello World!'.

At this point in the book, you don't yet have any tools to make the content more dynamic. To be precise, React requires that state concept (which will be covered in a later chapter) to change the content that is displayed (e.g. upon user input or some other event).

Nonetheless, since this chapter is about JSX, it is worth diving into the syntax for outputting dynamic content, even though it's not yet dynamic.

function App() {
  const userName = 'Max';
  return <p>Hi, my name is {userName}!</p>;

This example technically still produces static output since userName never changes; but you can already see the syntax for outputting dynamic content...