Book Image

Mastering TypeScript 3 - Third Edition

By : Nathan Rozentals
Book Image

Mastering TypeScript 3 - Third Edition

By: Nathan Rozentals

Overview of this book

TypeScript is both a language and a set of tools to generate JavaScript. It was designed by Anders Hejlsberg at Microsoft to help developers write enterprise-scale JavaScript. Starting with an introduction to the TypeScript language, before moving on to basic concepts, each section builds on previous knowledge in an incremental and easy-to-understand way. Advanced and powerful language features are all covered, including asynchronous programming techniques, decorators, and generics. This book explores many modern JavaScript and TypeScript frameworks side by side in order for the reader to learn their respective strengths and weaknesses. It will also thoroughly explore unit and integration testing for each framework. Best-of-breed applications utilize well-known design patterns in order to be scalable, maintainable, and testable. This book explores some of these object-oriented techniques and patterns, and shows real-world implementations. By the end of the book, you will have built a comprehensive, end-to-end web application to show how TypeScript language features, design patterns, and industry best practices can be brought together in a real-world scenario.
Table of Contents (16 chapters)
Free Chapter
TypeScript Tools and Framework Options

Unit testing frameworks

There are many JavaScript unit testing frameworks available, and also a few that have been written in TypeScript. Two of the most popular JavaScript frameworks are Jasmine ( and QUnit ( If you are writing node-based TypeScript code, then you might want to have a look at Mocha (

Although there have been attempts at writing unit testing frameworks in TypeScript and for TypeScript, such as MaxUnit by KnowledgeLake, or tsUnit by Steve-Fenton, these frameworks never really took off. Their limited set of features compared to the battle-hardened, tried-and-tested frameworks meant that they had a lot of catching up to do, and were eventually abandoned.

The ease with which TypeScript can integrate with JavaScript libraries means that developers looking for a fully featured set...