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)

Configuring the TypeScript compiler

Now that everything is set up with npm, we can turn our focus to TypeScript.

Typically, the first thing to do in any TypeScript project is to create the compiler configuration file. So, indeed, at this point, you need to be aware of the fact that the TypeScript compiler can be configured through a file called tsconfig.json. The presence of a tsconfig.json file in a folder tells TypeScript that the folder is the root of a TypeScript project.

Through tsconfig.json, you can precisely configure the compiler, adapting it to your project and its specific needs.

To get started, create a default configuration file using npm run compile -- --init.

Do you remember npm <script_name> -- <arguments>? This is how you can pass arguments to the programs executed by your npm scripts. If you don't like that approach, then you can...