Book Image

Mastering TypeScript - Fourth Edition

By : Nathan Rozentals
Book Image

Mastering TypeScript - Fourth Edition

By: Nathan Rozentals

Overview of this book

TypeScript is both a language and a set of tools to generate JavaScript, designed by Anders Hejlsberg at Microsoft to help developers write enterprise-scale JavaScript. Mastering Typescript is a golden standard for budding and experienced developers. With a structured approach that will get you up and running with Typescript quickly, this book will introduce core concepts, then build on them to help you understand (and apply) the more advanced language features. You’ll learn by doing while acquiring the best programming practices along the way. This fourth edition also covers a variety of modern JavaScript and TypeScript frameworks, comparing their strengths and weaknesses. You'll explore Angular, React, Vue, RxJs, Express, NodeJS, and others. You'll get up to speed with unit and integration testing, data transformation, serverless technologies, and asynchronous programming. Next, you’ll learn how to integrate with existing JavaScript libraries, control your compiler options, and use decorators and generics. By the end of the book, you will have built a comprehensive set of web applications, having integrated them into a single cohesive website using micro front-end techniques. This book is about learning the language, understanding when to apply its features, and selecting the framework that fits your real-world project perfectly.
Table of Contents (19 chapters)
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In this chapter, we focused on the asynchronous nature of the JavaScript runtime, and what techniques we can use to work with this feature. We started with callbacks, which is a standard way of handling asynchronous calls within JavaScript. We also explored the concept of callback hell, which is where using callbacks can become a bit of a nightmare. We then explored Promises, showing how the simple but strict syntax can be applied to any type of asynchronous processing. Finally, we examined the new async await syntax that can be used to pause execution of a code block until a Promise has completed.

In the next chapter, we will take a look at decorators, and how we can inject functionality into existing code using a simple decorator convention.