Book Image

Full Stack Development with Spring Boot 3 and React - Fourth Edition

By : Juha Hinkula
5 (1)
Book Image

Full Stack Development with Spring Boot 3 and React - Fourth Edition

5 (1)
By: Juha Hinkula

Overview of this book

If you’re an existing Java developer who wants to go full stack or pick up another frontend framework, this book is your concise introduction to React. In this three-part build-along, you’ll create a robust Spring Boot backend, a React frontend, and then deploy them together. This new edition is updated to Spring Boot 3 and includes expanded content on security and testing. For the first time ever, it also covers React development with the in-demand TypeScript. You’ll explore the elements that go into creating a REST API and testing, securing, and deploying your applications. You’ll learn about custom Hooks, third-party components, and MUI. By the end of this book, you'll be able to build a full stack application using the latest tools and modern best practices.
Table of Contents (23 chapters)
1
Part I: Backend Programming with Spring Boot
8
Part II: Frontend Programming with React
14
Part III: Full Stack Development
21
Other Books You May Enjoy
22
Index

Conditional rendering

You can use a conditional statement to render different UIs if a condition is true or false. This feature can be used, for example, to show or hide some elements, handle authentication, and so on.

In the following example, we will check if props.isLoggedin is true. If so, we will render the <Logout /> component; otherwise, we render the <Login /> component. This is now implemented using two separate return statements:

function MyComponent(props) {
  const isLoggedin = props.isLoggedin;
  if (isLoggedin) {
    return (
      <Logout />
    )
  }
  return (
    <Login />
  )
}

You can also implement this by using condition ? true : false logical operators, and then you need only one return statement, as illustrated here:

function MyComponent(props) {
  const isLoggedin = props.isLoggedin;
  return (
    <>
      { isLoggedin ? <Logout /> : <Login /> }
    </>
  );
}