Discover various techniques to develop maintainable code and keep it in shape. Key FeaturesLearn all about refactoring - why it is important and how to do itDiscover easy ways to refactor code with examplesExplore techniques that can be applied to most other programming languagesBook 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 learnSpot and fix common code smells to create code that is easier to read and understandDiscover ways to identify long methods and refactor themCreate objects that keep your code flexible, maintainable, and testableApply the Single Responsibility Principle to develop less-coupled codeDiscover how to combine different refactoring techniquesLearn ways to solve the issues caused by overusing primitivesWho 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.

Making significant changes to large, complex codebases is a daunting task--one that's nearly impossible to do successfully unless you have the right team, tools, and mindset. If your application is in need of a substantial overhaul and you're unsure how to go about implementing those changes in a sustainable way, then this book is for you. Software engineer Maude Lemaire walks you through the entire refactoring process from start to finish. You'll learn from her experience driving performance and refactoring efforts at Slack during a period of critical growth, including two case studies illustrating the impact these techniques can have in the real world. This book will help you achieve a newfound ability to productively introduce important changes in your codebase. Understand how code degrades and why some degradation is inevitable Quantify and qualify the state of your codebase before refactoring Draft a well-scoped execution plan with strategic milestones Win support from engineering leadership Build and coordinate a team best suited for the project Communicate effectively inside and outside your team Adopt best practices for successfully executing the refactor

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 practices Key Features Identify common gotchas and antipatterns when developing TypeScript applications and understand how to avoid them Discover expert techniques and best practices in developing large-scale TypeScript applications Explore advanced design patterns taken from functional programming and reactive programming Book Description 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. What you will learn Understand the role of design patterns and their significance Explore all significant design patterns within the context of TypeScript Analyze, and develop classical design patterns in TypeScript Find out how design patterns differ from design concepts Understand how to put the principles of design patterns into practice Discover additional patterns that stem from functional and reactive programming Who this book is for If 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.

Build scalable and reliable web applications with TypeScript KEY FEATURES ● Learn about basic and advanced TypeScript concepts. ● Build a simple Todo application using TypeScript with JavaScript, React, and Node. ● Using TypeScript to write tests, incorporating third-party libraries, and deploying to production. DESCRIPTION Navigating the dynamic landscape of web development can be a daunting task, "TypeScript Crash Course" is a guide to help you on the journey of mastering TypeScript, one of today's most sought-after skills in the tech market. Starting from the basics and core principles to gradually building up to more advanced concepts, this book will help you move to practical examples of converting an application from JavaScript, React, and Node to TypeScript. This book also offers insights into leveraging TypeScript for both front-end and back-end development, ensuring readers can tackle any project with confidence, from development to deployment. This guide is not just about learning a new programming language; it is about enhancing your career in the tech industry by building more reliable applications. This book focuses on applying TypeScript in diverse practical scenarios to significantly shorten your learning curve. It also dispels common myths and misconceptions about TypeScript, equipping you with the knowledge to navigate your career paths successfully. WHAT YOU WILL LEARN ● Master TypeScript fundamentals and more advanced concepts to develop scalable web applications. ● Transition seamlessly from JavaScript to TypeScript, enhancing code reliability and maintainability. ● Apply TypeScript in real-world scenarios, such as migrating JavaScript applications, designing user interfaces with React, and developing server-side applications with Node. ● Understand and implement advanced TypeScript features, such as generics and decorators. ● Selecting the right tools and frameworks to boost project efficiency and performance. WHO THIS BOOK IS FOR This book is ideal for web developers, software engineers, and programming enthusiasts eager to expand their JavaScript skills into TypeScript. It is perfect for those aiming to enhance their web development prowess and employability in the tech industry. TABLE OF CONTENTS 1. Introduction to TypeScript 2. Installation and Setup 3. TypeScript's Fundamentals 4. Structuring and Extending Types 5. Working with Advanced TypeScript Features 6. Migrating a JavaScript Web App to TypeScript 7. Adding TypeScript to a React Application 8. Using TypeScript with a Node.js Application 9. Building TypeScript for Production 10. Best Practices and Next Steps

Build exciting end-to-end applications with TypeScript About This Book This book will help you whether you're a beginner or an expert Complete and complex projects provide codes that are ready and solutions for start-ups and enterprise developers The book will showcase the power and depth of TypeScript when it comes to high performance and scalability Who This Book Is For This book was written for web developers who wish to make the most of TypeScript and build fun projects. You should be familiar with the fundamentals of JavaScript What You Will Learn Build quirky and fun projects from scratch while exploring widely applicable practices and techniques Use TypeScript with a range of different technologies such as Angular 2 and React and write cross-platform applications Migrate JavaScript codebases to TypeScript to improve your workflow Write maintainable and reusable code that is helpful in the world of programming revolving around features and bugs Using System.JS and Webpack to load scripts and their dependencies. Developing highly performance server-side applications to run within Node Js. Reviewing high performant Node.js patterns and manage garbage collection. In Detail TypeScript is the future of JavaScript. Having been designed for the development of large applications, it is being widely incorporated in popular projects such as Angular JS 2.0. Adopting TypeScript results in more robust software, while still being deployable in apps where regular JavaScript would run. Scale and performance lie at the heart of the projects built in our book. The lessons learned throughout this book will arm you with everything you need to build amazing projects. During the course of this book, you will learn how to build a complete Single Page Application with Angular 2 and create a popular mobile app using NativeScript. Further on, you will build a classic Pac Man game in TypeScript. We will also help you migrate your legacy codebase project from JavaScript to TypeScript. By the end of the book, you will have created a number of exciting projects and will be competent using TypeScript for your live projects. Style and approach The book focuses on building projects from scratch. These end-to-end projects will give you ready-to-implement solutions for your business scenario, showcasing the depth and robustness of TypeScript.

Refactoring is gaining momentum amongst the object oriented programming community. It can transform the internal dynamics of applications and has the capacity to transform bad code into good code. This book offers an introduction to refactoring.

Gain expertise in React, Hooks, Redux, React Router, Next.js, Best Practices, and much more KEY FEATURES ● Hands-on examples and projects for learning React and TypeScript. ● Starts with basics and advances to complex topics like Redux and GraphQL. ● Offers best practices for writing clean and efficient code. ● Bonus chapters on React Native and future trends. DESCRIPTION React is great for building interfaces, and TypeScript adds typing and better tools. React development using TypeScript is a complete guide that combines React and TypeScript to help you become a skilled React developer. It covers React basics, JSX syntax, and essential JavaScript features. You will learn about component state management with hooks like useState and useEffect, handling user interactions, and using Axios for REST API integration. It includes unit testing with Jest and React Testing Library and explores Redux for state management. Learn optimization strategies and use Next.js for server-side rendering. Bonus content includes React Native for mobile apps and integrating React with GraphQL. This book also covers advanced features like Concurrent Mode, Suspense, and React Server Components. By the end of this book, you will be equipped to confidently build modern, interactive web applications using React and TypeScript. You will not only understand core React concepts but also have the skills to tackle complex state management with Redux and explore advanced features like server-side rendering with Next.js. WHAT YOU WILL LEARN ● Learn core React concepts and understand the benefits of TypeScript in React development. ● Grasp fundamental JavaScript concepts like variables, data types, and functions. ● Integrate React applications with REST APIs using Axios. ● Build user interfaces with React Native components. ● Optimize React application performance using memoization and profiling tools. WHO THIS BOOK IS FOR This book is for junior and senior frontend developers who want to improve their skills. JavaScript developers moving to React, tech enthusiasts interested in modern web development, and students who want practical knowledge. TABLE OF CONTENTS 1. Getting Started with React 18 and TypeScript 2. JavaScript Refresher 3. Understanding the Basics of React 4. React Hooks 5. Managing Component State and Lifecycle 6. Integrating with REST APIs 7. Testing React Application 8. Routing in React with React Router 9. State Management in React 10. Optimizing and Scaling React Apps 11. Building Server-side Rendered Applications with Next.js 12. React Native for Mobile Development 13. Integrating React with GraphQL 14. Exploring React’s Future Trends 15. Final Thoughts