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

Learning Reactive programming concepts

When we use the term Reactive in computer programming, we usually refer to the following three concepts:

  • Reactive programming: This is a computing paradigm that says that information flow is propagated asynchronously. For example, if one service object queries another service for some data, the response does not happen at the same time. What this means is that the response might be accepted but gets evaluated at a later time. Once the response is ready, then there are several predefined ways (such as callbacks or Futures) to propagate it to consumers.
  • Reactive systems: A Reactive system is a set of concepts and design principles for building scalable and distributed applications that maintain an asynchronous way of communication. These stem from the Reactive manifesto, which is a document that defines the core principles of Reactive programming.
  • Functional reactive programming (FRP): This is a combination of Reactive programming...