100 TypeScript Mistakes and How to Avoid Them by Azat Mardan

Navigating the complexities of the TypeScript ecosystem can feel like a daunting endeavor, even for the seasoned coder. However, within these challenges lie lessons that propel one toward mastery. Welcome to 100 TypeScript Mistakes and How to Avoid Them, your definitive guide to the quirks, missteps, and common pitfalls of TypeScript.

Who is this book for?

TypeScript has been scaling the heights of programming popularity at a staggering pace, promising developers a richer environment than traditional JavaScript. But with new horizons come new challenges. This book isn’t just a collection of mistakes; it’s a journey of discovery, offering insights into the very heart of the language’s unique features and mechanics.

Regardless of whether you’re new to TypeScript or have been coding with it for years, this book promises an enlightening experience, peppered with practical advice, actionable solutions, and yes, a touch of humor. With every chapter, you’ll learn to recognize and sidestep potential missteps, refining your coding skills and enhancing your understanding of this powerful language.

Are you ready to uncover the mysteries of TypeScript and avoid those all-too-common blunders? Let’s get started on this transformative adventure by examining a snapshot of the type of content you’ll find within.


Out Now! Only at Manning.com


Delving TypeScript Essentials

TypeScript Basics:

At the heart of TypeScript lies its type system. You’ll grasp how static typing works, and why `any` and `unknown` types are considered TypeScript’s escape hatches.

TypeScript vs. JavaScript:

Learn about the main differences and similarities. Did you know that every JavaScript program is also a TypeScript program? However, TypeScript introduces new syntax and concepts not present in JavaScript, such as interfaces and types.

Working with Types and Interfaces:

TypeScript offers a variety of ways to define and enforce types. You’ll explore how to use the `interface` keyword to define the shape of an object, and how type aliases can provide alternative ways to define and combine types.

Common Pitfalls:

Developers often stumble upon challenges with TypeScript’s strict nature. For instance, a common error is trying to access a property that does not exist on a type. Through real-world examples, we’ll discuss how to avoid and overcome these hurdles.

Managing Optional, Null, and Undefined Types:

TypeScript introduced the concept of optional properties in interfaces, which have a question mark after their name. You’ll learn how to work with these, along with the nuances of `null` and `undefined` in a type-safe manner.

Advanced TypeScript Features:

Delve into powerful TypeScript concepts like decorators—functions that can be used to modify the behavior of classes, methods, and properties. You’ll also master generics, which allow you to create reusable components that work with a variety of types.

Debugging and Rectifying Errors:

TypeScript’s compiler is notorious for its strictness, ensuring fewer runtime errors. We’ll break down common compiler errors, their meanings, and how to solve them efficiently.


Throughout this book, each lesson is complemented by practical exercises and code examples, ensuring that you not only understand the theory but also know how to implement your newfound knowledge in real-world scenarios.


Join Our Newsletter to Say Up-to-Date on New Releases, Discounts, & More!


About the Author:

Azat Mardan is your navigator through the intricate realm of TypeScript. With best-sellers like Pro Express.js, Practical Node.js, and React Quickly under his belt, he is no stranger to the world of coding. While these titles largely explore JavaScript, Node.js, and React, his experience isn’t confined to these alone. Having worked in tech giants like Google, YouTube, Indeed, DocuSign, and Capital One, Azat has encountered and learned from a multitude of TypeScript conundrums.

Azat’s latest book isn’t a critique but a treasure trove of knowledge accumulated from his stumbles and fumbles. It’s an ode to the power of mistakes as learning tools. So, buckle up, for Azat promises an enlightening journey through TypeScript, full of insights and the occasional chuckle. Happy coding!