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

Inheritance

Inheritance is another paradigm that is one of the cornerstones of object-oriented programming. Inheritance allows us to create an object based on another object, thereby inheriting all of its characteristics, including properties and functions. In TypeScript, inheritance can be used by classes and interfaces. In this section of the chapter, we will take a closer look at inheritance, and what it means for both classes and interfaces.

When discussing inheritance, it is important to clearly distinguish between the class that forms the basis of the inheritance structure, and the class that is doing all of the inheriting. We will use the term "base class," or "base interface," to denote the class or interface that forms the base of the inheritance structure, and the term "derived class," or "derived interface," to denote the class or interface that is doing the inheriting.

TypeScript uses the keyword extends to implement inheritance...