Book Image

Hands-On Full Stack Development with Spring Boot 2 and React - Second Edition

By : Juha Hinkula
Book Image

Hands-On Full Stack Development with Spring Boot 2 and React - Second Edition

By: Juha Hinkula

Overview of this book

React Hooks have changed the way React components are coded. They enable you to write components in a more intuitive way without using classes, which makes your code easier to read and maintain. Building on from the previous edition, this book is updated with React Hooks and the latest changes introduced in create-react-app and Spring Boot 2.1. This book starts with a brief introduction to Spring Boot. You’ll understand how to use dependency injection and work with the data access layer of Spring using Hibernate as the ORM tool. You’ll then learn how to build your own RESTful API endpoints for web applications. As you advance, the book introduces you to other Spring components, such as Spring Security to help you secure the backend. Moving on, you’ll explore React and its app development environment and components for building your frontend. Finally, you’ll create a Docker container for your application by implementing the best practices that underpin professional full stack web development. By the end of this book, you’ll be equipped with all the knowledge you need to build modern full stack applications with Spring Boot for the backend and React for the frontend.
Table of Contents (22 chapters)
Free Chapter
1
Section 1: Backend Programming with Spring Boot
7
Section 2: Frontend Programming with React
12
Section 3: Full Stack Development

Basics of ES6

ES6 (short for ECMAScript 2015) was released in 2015, and it introduced a lot of new features. ECMAScript is a standardized scripting language, and JavaScript is one implementation of it. In this section, we will go through the most important features released in ES6 that we will be using in the following sections.

Understanding constants

Constants, or immutable variables, can be defined by using a const keyword, as shown in the following code. When using the const keyword, the variable content cannot be reassigned:

const PI = 3.14159;

The scope of const is block scoped, which is the same as the scope for let. This means that the const variable can only be used inside the block in which it is defined. In practice...