Book Image

Mastering TypeScript - Fourth Edition

By : Nathan Rozentals
4.7 (3)
Book Image

Mastering TypeScript - Fourth Edition

4.7 (3)
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)
17
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18
Index

Summary

In this chapter, we explored the integration points that TypeScript allows when using JavaScript. We discussed how to use external JavaScript libraries or external JavaScript code within TypeScript code through the use of declaration files. We then built a declaration file from some JavaScript and learned how to describe the JavaScript types correctly for use within TypeScript. We then had a quick overview of how types are described in declaration files, and found that almost every language construct and keyword in the TypeScript language can be used within a declaration file. Finally, we took a look at how we can use some compiler options to allow both JavaScript and TypeScript files within the same project, and how TypeScript can generate declaration files for us.

In the next chapter, we will take a look at the strict compiler options that are made available to us, and how these can be used to check for potential errors within our code.