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

Interfaces, Classes, and Inheritance

We have already seen how TypeScript uses basic types, inferred types, function signatures and tuples to bring a strongly typed development experience to JavaScript. This strongly typed paradigm also includes object-oriented features that are similar to other languages, such as interfaces, classes, and inheritance. Where TypeScript has always had language constructs for interfaces and classes, these object-oriented features have only recently been ratified with the ECMAScript six standard. This means that, in order to use these object-oriented features in JavaScript, our target environment must support the ES6 standard. TypeScript, however, will take care of generating ES3 or ES5-compatible JavaScript. This means that, no matter what JavaScript runtime we are targeting, we are able to use all of the goodness of object-oriented TypeScript to...