Book Image

Full-Stack React, TypeScript, and Node

By : David Choi
2 (1)
Book Image

Full-Stack React, TypeScript, and Node

2 (1)
By: David Choi

Overview of this book

React sets the standard for building high-performance client-side web apps. Node.js is a scalable application server that is used in thousands of websites, while GraphQL is becoming the standard way for large websites to provide data and services to their users. Together, these technologies, when reinforced with the capabilities of TypeScript, provide a cutting-edge stack for complete web application development. This book takes a hands-on approach to implementing modern web technologies and the associated methodologies for building full-stack apps. You’ll begin by gaining a strong understanding of TypeScript and how to use it to build high-quality web apps. The chapters that follow delve into client-side development with React using the new Hooks API and Redux. Next, you’ll get to grips with server-side development with Express, including authentication with Redis-based sessions and accessing databases with TypeORM. The book will then show you how to use Apollo GraphQL to build web services for your full-stack app. Later, you’ll learn how to build GraphQL schemas and integrate them with React using Hooks. Finally, you’ll focus on how to deploy your application onto an NGINX server using the AWS cloud. By the end of this book, you’ll be able to build and deploy complete high-performance web applications using React, Node, and GraphQL.
Table of Contents (22 chapters)
Section 1:Understanding TypeScript and How It Can Improve Your JavaScript
Section 2: Learning Single-Page Application Development Using React
Section 3: Understanding Web Service Development Using Express and GraphQL
Chapter 16: Adding a GraphQL Schema – Part II

Understanding client-side testing for React

Unit testing is a very important part of development. These days, no large projects will be written without some level of unit testing. The purpose of tests is to ensure that your code is always working correctly and doing the expected things. This is especially true when code is modified, that is, refactored. In fact, it is probably more difficult to change existing complex code than it is to create brand-new code. Unit testing can prevent breaking existing code during refactoring. But if code does break, it can also help pinpoint the exact place where code no longer works so it can be fixed quickly.

In React, previously, there were two main testing libraries that were commonly used: Jest and Enzyme. Jest is the main testing library that provides base calls such as assertions to check for specific values and wrapper functions to help set up tests. Enzyme has a set of helpers that allows the testing of React components in concert with...