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


Modularization is a popular technique used in modern programming languages that allows programs to be built from a series of smaller libraries, or modules. Writing programs that use modules encourages programmers to write code that conforms to the design principle called Separation of Concerns. The basic principle of Separation of Concerns is that we should program against a defined interface. This means that, the code that is implementing this interface can be refactored, improved, enhanced, or even completely replaced without the rest of the program being affected. This also helps when testing our code, since the code that is providing the implementation of an interface can easily be stubbed, or mocked out in a test scenario.

JavaScript, prior to ECMAScript 6, did not have a concept of modules. Popular frameworks and libraries, such as Node and Require, implemented...