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Refactoring TypeScript

Keeping Your Code Healthy

James Hickey

Ever find your code getting out of hand? Much like a garden, code requires constant care to remain "healthy."

This book is an approachable look at getting your code into shape. Learn some of the causes of unhealthy code, how to identify them, techniques to cure them, and more.

Let's bring your code back to life again!

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About

About

About the Book

**Now includes an LLM-Optimized Datapack when purchased!**

You know that piece of code your teammates hate to touch? The one that keeps producing bugs?...

Much like a garden, our code will become overgrown with "weeds" if ignored. What if there was a way to identify these weeds? And, what if there was an approachable way to learn how we can fix these issues? That's what this book is about.

You'll learn some of the main causes of unhealthy code, tips to identify them and techniques to address them.

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Categories

RefactoringComputers and ProgrammingTypeScript

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Author

About the Author

James Hickey

James is a Microsoft MVP with a background in the fintech & insurance-related industries. His focus is on domain-driven design, evolutionary software architecture and code quality.

He's the author of Refactoring TypeScript and the creator of a popular suite of advanced application tools for .NET called Coravel.

Contents

Table of Contents

Introduction

About TypeScript

What Is Refactoring?

Why Refactor At All?

When Should I Refactor?

  1. Null Checks Everywhere!

Identification

Null Object Pattern

Special Case Pattern

  1. Wordy Conditionals

Identification

Combine Conditionals

Extracting Methods From Conditionals

Extracting Conditional Logic To Explicit Classes

Pipe Classes

  1. Nested Conditionals

Identification

Guard Clauses

Gate Classes

  1. Primitive Overuse

Identification

Value Objects

Deceptive Booleans

  1. Lengthy Method Signatures

Identification

Create A Reusable Private Method

Extract Data Objects

  1. Methods That Never End

Identification

Give It a Name

Being Strategic

  1. Dumping Grounds

Identification

One Of These Things Is Not Like The Others

Speak Or Listen

  1. Messy Object Creation

Identification

Factory Functions

Combining Refactoring Techniques

  1. Conclusion

This Is Just The Beginning!

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