Book Image

Learn TypeScript 3 by Building Web Applications

By : Sebastien Dubois, Alexis Georges
Book Image

Learn TypeScript 3 by Building Web Applications

By: Sebastien Dubois, Alexis Georges

Overview of this book

TypeScript is a superset of the JavaScript programming language, giving developers a tool to help them write faster, cleaner JavaScript. With the help of its powerful static type system and other powerful tools and techniques it allows developers to write modern JavaScript applications. This book is a practical guide to learn the TypeScript programming language. It covers from the very basics to the more advanced concepts, while explaining many design patterns, techniques, frameworks, libraries and tools along the way. You will also learn a ton about modern web frameworks like Angular, Vue.js and React, and you will build cool web applications using those. This book also covers modern front-end development tooling such as Node.js, npm, yarn, Webpack, Parcel, Jest, and many others. Throughout the book, you will also discover and make use of the most recent additions of the language introduced by TypeScript 3 such as new types enforcing explicit checks, flexible and scalable ways of project structuring, and many more breaking changes. By the end of this book, you will be ready to use TypeScript in your own projects and will also have a concrete view of the current frontend software development landscape.
Table of Contents (15 chapters)

Frontend – installing React Router

As with the previous version of LyricsFinder, we will use a router to go from the home page to the lyrics page. Let's start by installing the router.

Once again, you should see a lot of similarities between what we did before and what we'll do in a minute with the router; the concepts are the same. As we said at the beginning, we are going to use react-router.

Let's install the library and its typings by executing the following command:

 yarn add react-router-dom @types/react-router-dom
If you want to easily find/add missing type definitions for your dependencies, then you can give this utility a try: https://github.com/jeffijoe/typesync.

Now, we're going to add the router outlet (that is, define the place where the router will render the active route) in our App component.

Open the frontend/src/App.tsx file and adapt...