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


In this chapter, we have had an in-depth discussion on decorators, generics, advanced generics, and asynchronous programming techniques using promises and async await. We have seen how decorators provide a way of injecting code into, or modifying, class definitions. We have also explored the use of experimental metadata information when working with decorators and class definitions. Our discussion then turned to generics, what they are, and how they are used. We worked through generic interfaces, and creating objects within generic functions. We then explored some advanced generic syntax, including conditional types and mapped types. Our final discussion revolved around asynchronous programming techniques using callbacks, promises, and the async and await keywords.

In the next chapter, we will look at the mechanism that TypeScript uses to integrate with existing JavaScript...