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
1
TypeScript Tools and Framework Options

Using definition files

There are a number of ways to include definition files within your project. When TypeScript was initially released, the only way to include definition files was to download them manually from DefinitelyTyped, store them into a directory within your project, and then reference them manually. As the popularity of TypeScript started increasing, so did the number of definition files, and thus finding and installing the correct files became more difficult. Several tools then started to emerge to aid with this process. The first of these was a Node-based command-line tool named tsd, which allowed for querying the DefinitelyTyped database, and installing the relevant definition files. tsd was deprecated in early 2016, in favour of another tool named Typings. Typings also allowed for querying and installing definition files based on the DefinitelyTyped database...