Book Image

TypeScript 4 Design Patterns and Best Practices

By : Theofanis Despoudis
Book Image

TypeScript 4 Design Patterns and Best Practices

By: Theofanis Despoudis

Overview of this book

Design patterns are critical armor for every developer to build maintainable apps. TypeScript 4 Design Patterns and Best Practices is a one-stop guide to help you learn design patterns and practices to develop scalable TypeScript applications. It will also serve as handy documentation for future maintainers. This book takes a hands-on approach to help you get up and running with the implementation of TypeScript design patterns and associated methodologies for writing testable code. You'll start by exploring the practical aspects of TypeScript 4 and its new features. The book will then take you through the traditional gang of four (GOF) design patterns in their classic and alternative form and show you how to use them in real-world development projects. Once you've got to grips with traditional design patterns, you'll advance to learning about their functional programming and reactive programming counterparts and how to couple them to deliver better and more idiomatic TypeScript code. By the end of this TypeScript book, you'll be able to efficiently recognize when and how to use the right design patterns in any practical use case and gain the confidence to work on scalable and maintainable TypeScript projects of any size.
Table of Contents (14 chapters)
1
Section 1: Getting Started with TypeScript 4
4
Section 2: Core Design Patterns and Concepts
8
Section 3: Advanced Concepts and Best Practices

Abstract Factory pattern

The Abstract Factory is a creational design pattern that lets you create an abstract representation of factories without specifying concrete classes. You can think of this pattern as a factory of factories. You use it to create a common shape of factory objects and then when you want to use them in practice, you implement specific methods to create those objects.

Using this pattern, you retain the flexibility to define multiple concrete implementations for the factories without altering the process of using them. The client code is easier to change and manages a different factory at runtime. Let's describe the reasons to use this pattern in practice.

When do we use the Abstract Factory?

This pattern provides a way to encapsulate the basic building methods for creating families of related objects. Those are the key observations and criteria to understand before applying this pattern:

  • Need a factory of related objects: Instead of creating...