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

Summary

In this chapter, we discussed the service locators and DI design patterns. We started by creating a class to send emails, and then created our own simple service locator that could resolve instances of classes given a string name. We then moved to a more resolute Service Location pattern that used class names instead of magic strings as the key to both registering and resolving instances of classes. We then discussed the pitfalls of the Service Location pattern, and implemented a DI framework using decorators.

In our next chapter, we will take a look at what it takes to build applications that combine a web server, such as Node and Express, with a TypeScript-friendly framework, such as Angular.