Typescript 4 design patterns and best practices : discover effective techniques and design patterns for every programming task / Theo Despoudis.

Format:

Book

Author/Creator:

Despoudis, Theo, author.

Language:

English

Subjects (All):

TypeScript (Computer program language).

Physical Description:

1 online resource (350 pages)

Place of Publication:

Birmingham ; Mumbai : Packt Publishing, [2021]

Biography/History:

Despoudis Theofanis: Theo Despoudis lives in Ireland, where he works as a Software Engineer for WP Engine and as a part-time tech practitioner for Fixate. He is the co-author of The React Workshop and Advanced Go Programming in 7 Days, Dzone Core Member, and maintains some open source projects on GitHub. Theo is available for conference talks, independent consulting, and corporate training services opportunities.

Summary:

A detailed and easy-to-follow guide to help you improve your TypeScript development skills and enable you to solve application design problems using modern practicesKey FeaturesIdentify common gotchas and antipatterns when developing TypeScript applications and understand how to avoid themDiscover expert techniques and best practices in developing large-scale TypeScript applicationsExplore advanced design patterns taken from functional programming and reactive programmingBook DescriptionDesign 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.What you will learnUnderstand the role of design patterns and their significanceExplore all significant design patterns within the context of TypeScriptAnalyze, and develop classical design patterns in TypeScriptFind out how design patterns differ from design conceptsUnderstand how to put the principles of design patterns into practiceDiscover additional patterns that stem from functional and reactive programmingWho this book is forIf you're a TypeScript developer looking to learn how to apply established design patterns to solve common programming problems instead of reinventing solutions, you'll find this book useful. You're not expected to have prior knowledge of design patterns. Basic TypeScript knowledge is all you need to get started with this book.

Contents:

Cover

Title Page

Copyright and Credits

Dedication

Contributors

Table of Contents

Preface

Section 1: Getting Started with TypeScript 4

Chapter 1: Getting Started with Typescript 4

Technical requirements

Introducing TypeScript 4

Working with input and output

Useful TypeScript 4 features

Understanding TypeScript and JavaScript's relationship

How does JavaScript compare to TypeScript?

Transitioning from JavaScript to TypeScript

Design patterns in JavaScript

Installing and using the code examples

Reviewing the libraries included in the code examples

Understanding the tsconfig.json file

Running the unit tests

Using VSCode with TypeScript

Using VSCode for this book's code

Inspecting types

Refactoring with VSCode

Introducing Unified Modeling Language (UML)

What is UML?

Learning UML class diagrams

Summary

Q &amp

A

Further reading

Chapter 2: TypeScript Core Principles

Working with advanced types

Using utility types

Using advanced types and assertions

OOP with TypeScript

Abstraction

Inheritance

Encapsulation

Polymorphism

Developing in the browser

Understanding the DOM

Using TypeScript with webpack

Using React

Developing in the server

Understanding the server environment

Using Express with TypeScript

Introducing design patterns in TypeScript

Why design patterns exist

Design patterns in TypeScript

Q&amp

Section 2: Core Design Patterns and Concepts

Chapter 3: Creational Design Patterns

Creational design patterns

Singleton pattern

When do we use the Singleton?

UML class diagram

Classic implementation

Modern implementations

Variants

Testing

Criticisms of the singleton

Real-world examples.

Prototype pattern

When do we use the Prototype pattern?

Criticisms of the Prototype pattern

Real-world examples

Builder pattern

When do we use Builder?

UML class diagram for Builder

Criticisms of Builder

Factory method pattern

When do we use the Factory method?

Alternative implementations

Abstract Factory pattern

When do we use the Abstract Factory?

Criticisms of Abstract Factory

Real-world example

Chapter 4: Structural Design Patterns

Understanding structural design patterns

Adapter pattern

When to use Adapter

Criticisms of Adapter

Real-world use cases

Decorator pattern

When to use Decorator

Modern variants

Criticisms of Decorator

Façade pattern

When to use Façade

Criticisms of Façade

Composite pattern

When to use Composite

Criticisms of Composite

Proxy pattern

When to use Proxy

Modern variant

Criticisms of Proxy

Bridge pattern

When to use Bridge

Criticisms of Bridge

Flyweight pattern

When to use Flyweight

UML class diagram.

Classic implementation

Criticisms of Flyweight

Chapter 5: Behavioral Design Patterns

Behavioral design patterns

The Strategy pattern?

When to use the Strategy pattern

Criticism of this pattern

Chain of Responsibility

When to use Chain of Responsibility?

Criticisms of this pattern

Real-world use case

The Command pattern

When to use the Command pattern?

The Iterator pattern

When to use the Iterator pattern?

The Mediator pattern

When to use the Meditator pattern?

The Observer pattern

When to use the Observer pattern?

The Memento pattern

When to use the Memento pattern?

The State pattern

When to use the State pattern?

The Template method pattern

When to use the Template method pattern?

The Visitor pattern

When to use the Visitor pattern?

Section 3: Advanced Concepts and Best Practices

Chapter 6: Functional Programming with TypeScript

Learning key concepts in functional programming

Pure functions

Recursion

Functions as first-class citizens

Function composition

Referential transparency

Immutability

Understanding functional lenses

Implementation of lenses

Use cases of lenses

Understanding transducers

Understanding monads

Chapter 7: Reactive Programming with TypeScript

Learning Reactive programming concepts

The asynchronous propagation of changes

The pull pattern

The push pattern

The push-pull pattern

Understanding Promises and Futures

Futures

Learning observables

Getting started with ReactiveX observables

Composable operators

Cold versus hot observables

Chapter 8: Developing Modern and Robust TypeScript Applications

Combining patterns

Singleton

Iterator

Command

Using domain-driven design

Understanding entities

Understanding value objects

Understanding domain events

Applying the SOLID principles

Understanding the single-responsibility principle

Understanding the open-closed principle

Understanding the Liskov substitution principle

Understanding the interface segregation principle

Understanding the dependency inversion principle

Is using SOLID a best practice?

Chapter 9: Anti-Patterns and Workarounds

Class overuse

Not using runtime assertions.

Permissive or incorrect types

Using idiomatic code from other languages

From the Java language

From the Go language

Type inference gotchas

About PACKT

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Index.

Notes:

Description based on print version record.

ISBN:

1-80056-541-0

OCLC:

1268133279