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 took a look at TypeScript's basic types, variables, and function techniques. We saw how TypeScript introduces syntactic sugar on top of normal JavaScript code to ensure strongly typed variables and function signatures. We also saw how TypeScript uses duck typing and explicit casting, and then discussed TypeScript functions, function signatures, and overrides. We completed the chapter with a discussion on advanced type techniques, including type guards, object rest and spread, tuples, and bigint.

In the next chapter, we will build on this knowledge and see how TypeScript extends these strongly typed rules into object-oriented concepts, such as interfaces, classes, and inheritance.