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Learn React Hooks
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Download or read book Learn React Hooks written by Daniel Bugl and published by Packt Publishing Ltd. This book was released on 2019-10-18 with total page 415 pages. Available in PDF, EPUB and Kindle. Book excerpt: Create large-scale web applications with code that is extensible and easy to understand using React Hooks Key FeaturesExplore effective strategies for migrating your state management from Redux and MobX to React HooksIntegrate Hooks with React features such as Context and Suspense to add advanced functionality to your web appsCreate complex applications by combining multiple hooksBook Description React Hooks revolutionize how you manage state and effects in your web applications. They enable you to build simple and concise React.js applications, along with helping you avoid using wrapper components in your applications, making it easy to refactor code. This React book starts by introducing you to React Hooks. You will then get to grips with building a complex UI in React while keeping the code simple and extensible. Next, you will quickly move on to building your first applications with React Hooks. In the next few chapters, the book delves into various Hooks, including the State and Effect Hooks. After covering State Hooks and understanding how to use them, you will focus on the capabilities of Effect Hooks for adding advanced functionality to React apps. You will later explore the Suspense and Context APIs and how they can be used with Hooks. Toward the concluding chapters, you will learn how to integrate Redux and MobX with React Hooks. Finally, the book will help you develop the skill of migrating your existing React class components, and Redux and MobX web applications to Hooks. By the end of this book, you will be well-versed in building your own custom Hooks and effectively refactoring your React applications. What you will learnUnderstand the fundamentals of React Hooks and how they modernize state management in React appsBuild your own custom Hooks and learn how to test themUse community Hooks for implementing responsive design and moreLearn the limitations of Hooks and what you should and shouldn’t use them forGet to grips with implementing React context using HooksRefactor your React-based web application, replacing existing React class components with HooksUse state management solutions such as Redux and MobX with React HooksWho this book is for This book is for React developers who want to learn how to build applications with Hooks. Developers who are looking to migrate to React for its advanced feature set and capabilities will also find the book useful.
Book Synopsis React Hooks in Action by : John Larsen
Download or read book React Hooks in Action written by John Larsen and published by Simon and Schuster. This book was released on 2021-04-13 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: Build stylish, slick, and speedy-to-load user interfaces in React without writing custom classes. React Hooks are a new category of functions that help you to manage state, lifecycle and side effects within functional components. React Hooks in Action teaches you to use pre-built hooks like useState, useReducer and useEffect, and to build your own hooks. Your code will be more reusable, require less boilerplate, and you'll instantly be a more effective React developer. About the technology React Hooks promise to make React programmers even more productive. Hooks are a collection of pre-built and custom functions that give you a simpler API for working with key React functionalities. Hooks cleanly encapsulate side effects, make it easier to reuse components between projects, and result in less code overall. These new features represent a fundamental evolution in how the React library functions, so even experienced React developers will want to get up to speed with Hooks. About the book React Hooks in Action shows you how to use Hooks to make your codebase simpler and more reusable, and your applications faster and more responsive. You'll build a resource booking example application chapter by chapter, learning how to develop components with local, shared, and application states. You'll discover different approaches to data fetching, including using Concurrent Mode and Suspense to improve user experience, and explore third party hooks in the evolving React ecosystem. What's inside Create a Redux store and interact with it via Hooks Use code-splitting to improve the responsiveness of your apps Build functional components that can update their own state Manage component side effects Use the React Suspense API to improve the user experience of page and data loading About the reader For front-end web developers experienced with React. About the author John Larsen is the author of Get Programming with JavaScript. He was a mathematics and computing teacher for 25 years. He has an MA in mathematics and an MSc in information technology, and an ongoing interest in educational research. A web developer since 2000, he uses JavaScript end-to-end for server-side and client-side programming.
Book Synopsis Micro State Management with React Hooks by : Daishi Kato
Download or read book Micro State Management with React Hooks written by Daishi Kato and published by Packt Publishing Ltd. This book was released on 2022-02-25 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explore global state management and select the best library for your application Key Features Understand the essential concepts and features of micro state management Discover solutions to common problems faced while implementing micro state management Explore the different libraries, their coding style, and the optimum approach to rendering optimization Book Description State management is one of the most complex concepts in React. Traditionally, developers have used monolithic state management solutions. Thanks to React Hooks, micro state management is something tuned for moving your application from a monolith to a microservice. This book provides a hands-on approach to the implementation of micro state management that will have you up and running and productive in no time. You'll learn basic patterns for state management in React and understand how to overcome the challenges encountered when you need to make the state global. Later chapters will show you how slicing a state into pieces is the way to overcome limitations. Using hooks, you'll see how you can easily reuse logic and have several solutions for specific domains, such as form state and server cache state. Finally, you'll explore how to use libraries such as Zustand, Jotai, and Valtio to organize state and manage development efficiently. By the end of this React book, you'll have learned how to choose the right global state management solution for your app requirement. What you will learn Understand micro state management and how you can deal with global state Build libraries using micro state management along with React Hooks Discover how micro approaches are easy using React Hooks Understand the difference between component state and module state Explore several approaches for implementing a global state Become well-versed with concrete examples and libraries such as Zustand, Jotai, and Valtio Who this book is for If you're a React developer dealing with complex global state management solutions and want to learn how to choose the best alternative based on your requirements, this book is for you. Basic knowledge of JavaScript programming, React Hooks and TypeScript is assumed.
Book Synopsis Designing React Hooks the Right Way by : Fang Jin
Download or read book Designing React Hooks the Right Way written by Fang Jin and published by Packt Publishing Ltd. This book was released on 2022-01-11 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: Get to grips with React Hooks and design your own custom Hook to manage application states for making better decisions in site architecture Key FeaturesGet to grips with Hooks' design and understand each built-in Hook's pitfalls with examplesDiscover how to turn your existing code into a reusable Hook via code refactoringExplore design solutions to identify and solve site performance issues involving HooksBook Description React hook creates a unique solution for using states in function components to orchestrate UI communication. They provide you with an easy interface to write custom data management solutions with low development and maintenance costs. Understanding how Hooks are designed enables you to use them more effectively, and this book helps you to do just that. This book starts with a custom-crafted solution to reveal why Hooks are needed in the first place. You will learn about the React engine and discover how each built-in Hook can manage a persistent value by hooking into it. You will walk through the design and implementation of each hook with code so that you gain a solid understanding. Finally, you'll get to grips with each Hook's pitfalls and find out how to effectively overcome them. By the end of this React book, you'll have gained the confidence to build and write Hooks for developing functional and efficient web applications at scale. What you will learnCreate your own hooks to suit your state management requirementDetect the current window size of your website using useEffectDebounce an action to improve user interface (UI) performance using useMemoEstablish a global site configuration using useContextAvoid hard-to-find application memory leaks using useRefDesign a simple and effective API data layer using custom HooksWho this book is for This book is for web developers who are looking for a consistent and efficient approach for applying application states with Hooks. Basic knowledge of React will help you to get the most out of this book.
Download or read book Learning React written by Alex Banks and published by "O'Reilly Media, Inc.". This book was released on 2020-06-12 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: If you want to learn how to build efficient React applications, this is your book. Ideal for web developers and software engineers who understand how JavaScript, CSS, and HTML work in the browser, this updated edition provides best practices and patterns for writing modern React code. No prior knowledge of React or functional JavaScript is necessary. With their learning road map, authors Alex Banks and Eve Porcello show you how to create UIs that can deftly display changes without page reloads on large-scale, data-driven websites. You’ll also discover how to work with functional programming and the latest ECMAScript features. Once you learn how to build React components with this hands-on guide, you’ll understand just how useful React can be in your organization. Understand key functional programming concepts with JavaScriptLook under the hood to learn how React runs in the browserCreate application presentation layers with React componentsManage data and reduce the time you spend debugging applicationsIncorporate React Hooks to manage state and fetch dataUse a routing solution for single-page application featuresLearn how to structure React applications with servers in mind
Download or read book Learning React written by Alex Banks and published by "O'Reilly Media, Inc.". This book was released on 2017-04-27 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: If you want to learn how to build efficient user interfaces with React, this is your book. Authors Alex Banks and Eve Porcello show you how to create UIs with this small JavaScript library that can deftly display data changes on large-scale, data-driven websites without page reloads. Along the way, you’ll learn how to work with functional programming and the latest ECMAScript features. Developed by Facebook, and used by companies including Netflix, Walmart, and The New York Times for large parts of their web interfaces, React is quickly growing in use. By learning how to build React components with this hands-on guide, you’ll fully understand how useful React can be in your organization. Learn key functional programming concepts with JavaScript Peek under the hood to understand how React runs in the browser Create application presentation layers by mounting and composing React components Use component trees to manage data and reduce the time you spend debugging applications Explore React’s component lifecycle and use it to load data and improve UI performance Use a routing solution for browser history, bookmarks, and other features of single-page applications Learn how to structure React applications with servers in mind
Book Synopsis React and React Native by : Adam Boduch
Download or read book React and React Native written by Adam Boduch and published by Packt Publishing Ltd. This book was released on 2017-03-08 with total page 485 pages. Available in PDF, EPUB and Kindle. Book excerpt: Use React and React Native to build applications for desktop browsers, mobile browsers, and even as native mobile apps About This Book Build React and React Native applications using familiar component concepts Dive deep into each platform, from routing in React to creating native mobile applications that can run offline Use Facebook's Relay, React and GraphQL technologies, to create a unified architecture that powers both web and native applications Who This Book Is For This book is written for any JavaScript developer—beginner or expert—who wants to start learning how to put both of Facebook's UI libraries to work. No knowledge of React is needed, though a working knowledge of ES2015 will help you follow along better. What You Will Learn Craft reusable React components Control navigation using the React Router to help keep your UI in sync with URLs Build isomorphic web applications using Node.js Use the Flexbox layout model to create responsive mobile designs Leverage the native APIs of Android and iOS to build engaging applications with React Native Respond to gestures in a way that's intuitive for the user Use Relay to build a unified data architecture for your React UIs In Detail React and React Native allow you to build cross-platform desktop and mobile applications using Facebook's innovative UI libraries. Combined with the Flux data architecture and Relay, you can now create powerful and feature-complete applications from just one code base! This book is split into three parts. The first part shows you how to start crafting composable UIs using React, from rendering with JSX and creating reusable components through to routing and creating isomorphic applications that run on Node. We then move on to showing you how to take the concepts of React and apply them to building Native UIs using React Native. You'll find out how to build responsive and streamlined UIs that can properly handle user interactions in a mobile environment. You'll also learn how to access device-specific APIs such as the geolocation API, and how to handle offline development with React Native. Finally, we'll tie all of these skills together and shows you how you can create React applications that run on every major platform. As well as understanding application state in depth, you'll learn how to leverage Relay to make feature-complete, data-driven web and native mobile applications. Style and approach Split into three major sections to help organize your learning, this hands-on, code-first book will help you get up to speed with React and React Native—the UI framework that powers Netflix, Yahoo, and Facebook.
Book Synopsis Beginning React (incl. Redux and React Hooks) by : Greg Lim
Download or read book Beginning React (incl. Redux and React Hooks) written by Greg Lim and published by Greg Lim. This book was released on 2020-09 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: Developed by Facebook, React is one of the leading frameworks to build efficient web user interfaces. You use small manageable components to build large-sale, data-driven websites without page reloads. No more wasting time hunting for DOM nodes! In this book, we take you on a fun, hands-on and pragmatic journey to master React from a web development point of view. You'll start building React apps within minutes. Every section is written in a bite-sized manner and straight to the point as I don't want to waste your time (and most certainly mine) on the content you don't need. In the end, you will have what it takes to develop a real-life app. About the Reader This book is for developers with basic familiarity with HTML, CSS, Javascript and object-oriented programming. No React experience needed. About the Author Greg Lim is a technologist and author of several programming books. Greg has many years in teaching programming in tertiary institutions and he places special emphasis on learning by doing. Table of Contents Introduction Creating and Using Components Bindings, Props, State and Events Working with Components Conditional Rendering Building Controlled Forms Getting Data From RESTful APIs with Axios React Routing C.R.U.D. with Firebase Introduction to Redux React with Redux Introduction to React Hooks
Book Synopsis Full-Stack React, TypeScript, and Node by : David Choi
Download or read book Full-Stack React, TypeScript, and Node written by David Choi and published by Packt Publishing Ltd. This book was released on 2020-12-18 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discover the current landscape of full-stack development and how to leverage modern web technologies for building production-ready React.js applications to deploy on AWS Key FeaturesUnderstand the architecture of React and single-page applicationsBuild a modern Web API for your SPA using Node.js, Express, and GraphQLGain a clear and practical understanding of how to build a complete full-stack applicationBook Description React sets the standard for building high-performance client-side web apps. Node.js is a scalable application server that is used in thousands of websites, while GraphQL is becoming the standard way for large websites to provide data and services to their users. Together, these technologies, when reinforced with the capabilities of TypeScript, provide a cutting-edge stack for complete web application development. This book takes a hands-on approach to implementing modern web technologies and the associated methodologies for building full-stack apps. You’ll begin by gaining a strong understanding of TypeScript and how to use it to build high-quality web apps. The chapters that follow delve into client-side development with React using the new Hooks API and Redux. Next, you’ll get to grips with server-side development with Express, including authentication with Redis-based sessions and accessing databases with TypeORM. The book will then show you how to use Apollo GraphQL to build web services for your full-stack app. Later, you’ll learn how to build GraphQL schemas and integrate them with React using Hooks. Finally, you’ll focus on how to deploy your application onto an NGINX server using the AWS cloud. By the end of this book, you’ll be able to build and deploy complete high-performance web applications using React, Node, and GraphQL. What you will learnDiscover TypeScript’s most important features and how they can be used to improve code quality and maintainabilityUnderstand what React Hooks are and how to build React apps using themImplement state management for your React app using ReduxSet up an Express project with TypeScript and GraphQL from scratchBuild a fully functional online forum app using React and GraphQLAdd authentication to your web app using RedisSave and retrieve data from a Postgres database using TypeORMConfigure NGINX on the AWS cloud to deploy and serve your appsWho this book is for The book is for web developers who want to go beyond front-end web development and enter the world of full-stack web development by learning about modern web technologies and how they come together. A good understanding of JavaScript programming is required before getting started with this web development book.
Book Synopsis React Design Patterns and Best Practices by : Carlos Santana Roldán
Download or read book React Design Patterns and Best Practices written by Carlos Santana Roldán and published by Packt Publishing Ltd. This book was released on 2019-03-30 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: We will be taking a complete journey through the most valuable design patterns in React, this book demonstrates how to apply design patterns and best practices in real-life situations, whether that’s for new or already existing projects. It will help you to make your applications more flexible, perform better, and easier to maintain.
Book Synopsis Learn React with TypeScript 3 by : Carl Rippon
Download or read book Learn React with TypeScript 3 written by Carl Rippon and published by Packt Publishing Ltd. This book was released on 2018-11-29 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: Start developing modern day component based web apps using React 16, Redux and TypeScript 3 with this easy to follow guide filled with practical examples. Key FeaturesLearn the latest and core features of React such as components, React Router, and suspenseDive into TypeScript 3 and it`s core components such as interfaces, types aliases, tuples, generics and much more.Build small-to-large scale single page applications with React, Redux, GraphQL and TypeScriptBook Description React today is one of the most preferred choices for frontend development. Using React with TypeScript enhances development experience and offers a powerful combination to develop high performing web apps. In this book, you’ll learn how to create well structured and reusable react components that are easy to read and maintain by leveraging modern web development techniques. We will start with learning core TypeScript programming concepts before moving on to building reusable React components. You'll learn how to ensure all your components are type-safe by leveraging TypeScript's capabilities, including the latest on Project references, Tuples in rest parameters, and much more. You'll then be introduced to core features of React such as React Router, managing state with Redux and applying logic in lifecycle methods. Further on, you'll discover the latest features of React such as hooks and suspense which will enable you to create powerful function-based components. You'll get to grips with GraphQL web API using Apollo client to make your app more interactive. Finally, you'll learn how to write robust unit tests for React components using Jest. By the end of the book, you'll be well versed with all you need to develop fully featured web apps with React and TypeScript. What you will learnGain a first-hand experience of TypeScript and its productivity features Transpile your TypeScript code into JavaScript for it to run in a browser Learn relevant advanced types in TypeScript for creating strongly typed and reusable components.Create stateful function-based components that handle lifecycle events using hooks Get to know what GraphQL is and how to work with it by executing basic queries to get familiar with the syntaxBecome confident in getting good unit testing coverage on your components using JestWho this book is for The ideal target audience for this book are web developers who want to get started with creating modern day web apps with React and TypeScript.You are expected to have a basic understanding of JavaScript and HTML programming. No prior knowledge of TypeScript and React is needed.
Book Synopsis React Quickly, Second Edition by : Morten Barklund
Download or read book React Quickly, Second Edition written by Morten Barklund and published by Simon and Schuster. This book was released on 2024-01-02 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: Learn the skills you need to build React applications quickly! This fully revised second edition introduces JSX, functional components, React hooks, event and form handling, and more. In React Quickly, Second Edition you will learn how to: Master React fundamentals Implement best practices and the components of good architecture Build intuitive user interfaces Create dynamic components with JSX Use lightweight functional components in React Make your app interactive with stateful components Utilize React hooks Handle events like button clicks and pass data between components Build your skills with React fast! There’s no slow theory and tedious history in React Quickly—you’ll dive into React code right from the very first chapter. As you go, you’ll explore over 80 useful and practical examples that put React into action. This new second edition has been completely rewritten to cover the latest developments in the React framework. Perfect, whether you’re a React beginner or an experienced pro looking to keep their skills up to date. About the technology React makes it a breeze to build beautiful, reliable web frontends. This amazing JavaScript library has a modular architecture, so you can create, combine, and test components seamlessly. React is perfect for small prototypes, enterprise scale sites, and everything in between. About the book React Quickly, Second Edition offers a unique approach to learning the React framework. More than 80 concise examples guide you from your first steps through advanced applications. You’ll appreciate the up-to-date coverage of functional components, React hooks, and web accessibility, along with interesting projects to practice your new skill. What's inside Master React fundamentals Best practices of component-based design Create dynamic components with JSX Make your app interactive with stateful components About the reader For developers comfortable building web applications with JavaScript. About the author Morten Barklund is an expert in React, web testing, and accessibility and is the founder of Coding Heaven. Azat Mardan is a seasoned software engineer, startup mentor, and best-selling author. Table of Contents 1 Meeting React 2 Baby steps with React 3 Introduction to JSX 4 Functional Components 5 Making React interactive with states 6 Effects and the React component life cycle 7 Hooks to fuel your web applications 8 Handling events in React 9 Working with forms in React 10 Advanced React hooks for scaling 11 Project: Website menu 12 Project: Timer 13 Project: Task manager
Book Synopsis React 17 Design Patterns and Best Practices by : Carlos Santana Roldán
Download or read book React 17 Design Patterns and Best Practices written by Carlos Santana Roldán and published by Packt Publishing Ltd. This book was released on 2021-05-17 with total page 381 pages. Available in PDF, EPUB and Kindle. Book excerpt: Build scalable, maintainable, and powerful React web apps with design patterns and insightful best practices Key Features Make the most of design patterns in React – including render props and controlled and uncontrolled inputs Master React Hooks with the help of this updated third edition Work through examples that can be used to create reusable code and extensible designs Book DescriptionFilled with useful React patterns that you can use in your projects straight away, this book will help you save time and build better web applications with ease. React 17 Design Patterns and Best Practices is a hands-on guide for those who want to take their coding skills to a new level. You’ll spend most of your time working your way through the principles of writing maintainable and clean code, but you’ll also gain a deeper insight into the inner workings of React. As you progress through the chapters, you’ll learn how to build components that are reusable across the application, how to structure applications, and create forms that actually work. Then you’ll build on your knowledge by exploring how to style React components and optimize them to make applications faster and more responsive. Once you’ve mastered the rest, you’ll learn how to write tests effectively and how to contribute to React and its ecosystem. By the end of this book, you'll be able to avoid the process of trial and error and developmental headaches. Instead, you’ll be able to use your new skills to efficiently build and deploy real-world React web applications you can be proud of.What you will learn Get to grips with the techniques of styling and optimizing React components Create components using the new React Hooks Use server-side rendering to make applications load faster Get up to speed with the new React Suspense technique and using GraphQL in your projects Write a comprehensive set of tests to create robust and maintainable code Build high-performing applications by optimizing components Who this book is for This book is for web developers who want to understand React better and apply it to real-life app development. You’ll need an intermediate-level experience with React and JavaScript before you get started.
Book Synopsis Fullstack React by : Accomazzo Anthony
Download or read book Fullstack React written by Accomazzo Anthony and published by Fullstack.IO. This book was released on 2017-03 with total page 836 pages. Available in PDF, EPUB and Kindle. Book excerpt: LEARN REACT TODAY The up-to-date, in-depth, complete guide to React and friends. Become a ReactJS expert today
Book Synopsis The The React Workshop by : Brandon Richey
Download or read book The The React Workshop written by Brandon Richey and published by Packt Publishing Ltd. This book was released on 2020-08-21 with total page 805 pages. Available in PDF, EPUB and Kindle. Book excerpt: Work through engaging exercises and activities and gain practical skills to make your web applications function effortlessly with the help of React Key FeaturesExplore the React environment by creating live projectsSolve real-world problems relating to building modern web applicationsGain a thorough understanding of how data moves through different React componentsBook Description Are you interested in how React takes command of the view layer for web and mobile apps and changes the data of large web applications without needing to reload the page? This workshop will help you learn how and show you how to develop and enhance web apps using the features of the React framework with interesting examples and exercises. The workshop starts by demonstrating how to create your first React project. You’ll tap into React’s popular feature JSX to develop templates and use DOM events to make your project interactive. Next, you’ll focus on the lifecycle of the React component and understand how components are created, mounted, unmounted, and destroyed. Later, you’ll create and customize components to understand the data flow in React and how props and state communicate between components. You’ll also use Formik to create forms in React to explore the concept of controlled and uncontrolled components and even play with React Router to navigate between React components. The chapters that follow will help you build an interesting image-search app to fetch data from the outside world and populate the data to the React app. Finally, you’ll understand what ref API is and how it is used to manipulate DOM in an imperative way. By the end of this React book, you’ll have the skills you need to set up and create web apps using React. What you will learnUse JSX to include logic in the view layer of applicationsGet familiar with the important methods and events in the React lifecycleDistinguish between class and functional component syntaxesCreate forms with Formik and handle errorsUnderstand the React Hooks API and the problems it can solveFetch outside data using the Axios library and populate the data to the appWho this book is for The React Workshop is for web developers and programmers who are looking to learn React and use it for creating and enhancing web applications. Although the workshop is for beginners, prior knowledge of JavaScript programming and HTML and CSS is necessary to easily understand the concepts that are covered.
Book Synopsis Beginning React with Hooks by : Greg Lim
Download or read book Beginning React with Hooks written by Greg Lim and published by Greg Lim. This book was released on 2020-09 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: Developed by Facebook, React is one of the leading frameworks to build efficient web user interfaces. You use small manageable components to build large-scale, data-driven websites without page reloads. In this book, we take you on a fun, hands-on and pragmatic journey to master React Hooks from a web development point of view. You'll start building React apps using functional components within minutes. Every section is written in a bite-sized manner and straight to the point as I don't want to waste your time (and most certainly mine) on the content you don't need. In the end, you will have what it takes to develop a real-life app. This book will give you everything you need to learn and be effective with the latest features of React Hooks. About the Reader Basic familiarity with HTML, CSS, Javascript and object-oriented programming. No prior knowledge of React is required as we start from React basics. But if you have previous experience with React class-based components, you will progress through the material faster. About the Author Greg Lim is a technologist and author of several programming books. Greg has many years in teaching programming in tertiary institutions and he places special emphasis on learning by doing. Table of Contents Introduction Creating and Using Components Bindings, Props, State and Events Working with Components Conditional Rendering Building Forms with Hooks Getting Data From RESTful APIs with Hooks C.R.U.D. with Hooks Connecting to an API to Persist Data
Book Synopsis Learning React Js by : Claudia Alves
Download or read book Learning React Js written by Claudia Alves and published by Independently Published. This book was released on 2020-10-03 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, we take you on a fun, hands-on and pragmatic journey to master React from a web development point of view. You'll start building React apps within minutes. Every section is written in a bite-sized manner and straight to the point as I don't want to waste your time (and most certainly mine) on the content you don't need. In the end, you will have what it takes to develop a real-life app.Facebook's React has changed the way we think about web applications and user interface development. Due to its design, you can use it beyond web. A feature known as the Virtual DOM enables this.In this chapter we'll go through some of the basic ideas behind the library so you understand React a little better before moving on.What is React?React is a JavaScript library that forces you to think in terms of components. This model of thinking fits user interfaces well. Depending on your background it might feel alien at first. You will have to think very carefully about the concept of state and where it belongs.Because state management is a difficult problem, a variety of solutions have appeared. In this book, we'll start by managing state ourselves and then push it to a Flux implementation known as Alt. There are also implementations available for several other alternatives, such as Redux, MobX, and Cerebral.React is pragmatic in the sense that it contains a set of escape hatches. If the React model doesn't work for you, it is still possible to revert back to something lower level. For instance, there are hooks that can be used to wrap older logic that relies on the DOM. This breaks the abstraction and ties your code to a specific environment, but sometimes that's the pragmatic thing to do.One of the fundamental problems of programming is how to deal with state. Suppose you are developing a user interface and want to show the same data in multiple places. How do you make sure the data is consistent?Historically we have mixed the concerns of the DOM and state and tried to manage it there. React solves this problem in a different way. It introduced the concept of the Virtual DOM to the masses.Virtual DOM exists on top of the actual DOM, or some other render target. It solves the state manipulation problem in its own way. Whenever changes are made to it, it figures out the best way to batch the changes to the underlying DOM structure. It is able to propagate changes across its virtual tree as in the image above.Virtual DOM PerformanceHandling the DOM manipulation this way can lead to increased performance. Manipulating the DOM by hand tends to be inefficient and is hard to optimize. By leaving the problem of DOM manipulation to a good implementation, you can save a lot of time and effort.React allows you to tune performance further by implementing hooks to adjust the way the virtual tree is updated. Though this is often an optional step.The biggest cost of Virtual DOM is that the implementation makes React quite big. You can expect the bundle sizes of small applications to be around 150-200 kB minified, React included. gzipping will help, but it's still big.
