Refactoring TypeScript: Keeping your code healthy

Book Description
Refactoring improves your code without changing its behavior. With refactoring, the best approach is to apply small targeted changes to a codebase. Instead of doing a huge sweeping change to your code, refactoring is better as a long-term and continuous enterprise. Refactoring TypeScript explains how to spot bugs and remove them from your code.

You’ll start by seeing how wordy conditionals, methods, and null checks make code unhealthy and unstable. Whether it is identifying messy nested conditionals or removing unnecessary methods, this book will show various techniques to avoid these pitfalls and write code that is easier to understand, maintain, and test.

By the end of the book, you’ll have learned some of the main causes of unhealthy code, tips to identify them and techniques to address them.

What you will learn
Spot and fix common code smells to create code that is easier to read and understand
Discover ways to identify long methods and refactor them
Create objects that keep your code flexible, maintainable, and testable
Apply the Single Responsibility Principle to develop less-coupled code
Discover how to combine different refactoring techniques
Learn ways to solve the issues caused by overusing primitives
Who this book is for
This book is designed for programmers who are looking to explore various refactoring techniques to develop healthy and maintainable code. Some experience in JavaScript and TypeScript can help you easily grasp the concepts explained in this book.

Table of Contents
Introduction
Null Checks Everywhere!
Wordy Conditionals
Nested Conditionals
Primitive Overuse
Lengthy Method Signatures
Methods That Never End
Dumping Grounds
Messy Object Creation
Conclusion