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首页精通React：Next.js驱动的SSR与PWA实战

精通React：Next.js驱动的SSR与PWA实战

react.js

reactjs

前端框架

javascript

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"Advanced Web Development with React" 是一本专注于深入学习React、Next.js以及服务器端渲染（SSR）和渐进式网页应用（PWA）的书籍，旨在提升读者在这些领域的专业技能。本书的核心特点包括对React的最新和核心概念的详细探讨，如React Hooks和React Reconciler。React Hooks是React 16.8引入的新特性，它允许开发者在不编写类组件的情况下使用状态和生命周期方法，使得函数组件更加灵活且易于理解。React Reconciler是React内部用于更新组件树的算法，它是React性能优化的关键部分，帮助开发者理解React如何处理组件的变更和渲染。另外，本书深入讲解了Server Side Rendering（SSR），这是在React中提升网页性能和SEO的一种技术。通过使用Next.js，一个基于React的框架，开发者可以轻松实现SSR，使网页内容在服务器上预先渲染为HTML，从而加快页面加载速度和提高搜索引擎爬虫的抓取效率。此外，作者还涵盖了Progressive Web App（PWA）的概念，PWA是结合了Web应用和原生应用特性的新型应用形式。通过创建PWA，开发者可以让Web应用具备离线工作、添加到主屏幕、推送通知等特性，提升用户体验。书中将教授如何在React环境中构建PWA，利用Service Worker和Web App Manifest等技术。书中还包括了一些中级开发者的进阶主题，这些内容将帮助读者深化对React生态系统的理解，并提供实际项目中的应用指导。通过学习这本书，读者不仅可以提升自己的React技术栈，还能掌握构建高性能、可扩展的Web应用所需的工具和策略。《Advanced Web Development with React》是React开发者进一步提升技术能力的理想资源，它提供了关于React高级概念、SSR和PWA的深度学习材料，对于想要在前端开发领域深入发展的专业人士来说，是一本不可多得的参考书。

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More on Link
Next.js components
Next.js + CSS
Styled JSX
Importing CSS files
Conclusion
Questions
7. More with Next.js
Structure
Objective
Next.js application
Getting project up
Switching to TypeScript
Redux
getInitialProps
Creating App
APIs using Next.js
Setting up Redux + Next.js
_app.js File
Dispatching Redux Actions
useSelector and useDispatch
Creating the Dashboard page
Conditional routing
Nested routes
Dynamic routing
Registration page
Conclusion
Questions
8. Progressive Web Apps
Structure
Objective
What is a progressive web app?
Hello World
manifest.json file
Service workers

Lifecycle
PWA using Next.js
Custom Next.js Server
next(config: object)
getRequestHandler()
serveStatic()
_document.js
Conclusion
Questions
9. Bleeding Edge React
Structure
Objective
How does React work?
Reconciler
Renderer
Moving from classes
Concurrent mode
Opting in concurrent mode
Suspense – Code fetching
Suspense – Data fetching
Conclusion
Questions

CHAPTER 1

React 101

JavaScript: It is the programming language of the web. Since the dawn of the

web, developers are eager to provide increasingly better experiences for the

end-user in terms of interactivity, animations, effects, and stability.

JavaScript made it all possible. As it progressed, there were needs for some

obvious reasons to introduce frameworks and libraries, for faster

development and better stability.

React is one such part of the ecosystem. React sells itself as “A JavaScript

library for building user interfaces”. But honestly, while being true to the

statement, we think React goes much beyond that. It could be made into a

complete ecosystem, powering some of the most complex web application

systems, for example, Facebook.

We’ll be quickly going through the React basics and then taking up

intermediate to advanced topics, which would really give you the essence of

React and eventually help you to start writing your production-ready

applications with React.

Very simply speaking, React is a User Interface (UI) library. Let’s break

that down:

1. React, on its own says that it’s a library, which means that it does not

try to ship everything with it. Instead, you have the option to cherry-

pick the things you want in your project and can implement them.

2. React says that it is a UI library, that is used for building interfaces

visible to the user. What does that mean? In simple terms, it means

creating and maintaining what the user sees on the screen.

Structure

Introduction

Understanding React

Basic understanding of how React works as a UI library

Declarative versus imperative programming

Cheat-sheet for further React topics

Objectives

In this introductory chapter, we’ll be understanding what exactly is React

doing and why should one care. We’ll be seeing on the surface, how it works

as a UI library and how the declarative approach of React is so powerful in

creating better UI systems. Finally, we’ll want to get started with React

programming, but would end the chapter with some notes that might be

handy to see as a JavaScript refresher.

React is component-based

React makes use of components. The ideology is simple - React says that

instead of coding everything at the same place (like we usually do while

coding simple HTML pages), break different (and usually independent) parts

of the page into different components. This increases the code

maintainability by factors and allows developers to have faster and clean

codebases. We’ll have dedicated chapters on working with components, as it

is the crux of React.

React is declarative

We’ll focus mainly on two programming paradigms here -declarative

programming and imperative programming. Let’s start with a simple

example.

When you write a code, you can specify:

1. What do you want to do?

2. How do you want to do?

If you specify both, you’re making use of the imperative programming

practice. If you’re just specifying what you want to do, then you’re using the

declarative way of programming. Here’s a simple example.

Consider that you want to draw a border around a box. In CSS, you’d simply

say border: 2px solid black. This is declarative. You just said what you want

to do, not how you want to do. On the other hand, if you try to draw the

border in vanilla JavaScript, you have to specify four coordinates, and then

draw the line manually using code. This would be an imperative way.

Declarative programming has its own pros and cons, but the pros almost

always outweigh the cons:

1. Declarative code can make use of highly optimized algorithms. Since

the “how” is abstracted from the end-user, the imperative model under

declarative code can make use of seriously complex code to provide

major performance boosts, while exposing an easy declarative way for

users to use the same functionality at the same time.

2. Declarative programming brings other benefits like code scalability,

reduced bugs, and more understandable code.

Coming back to React, it is declarative. This means that you just tell React

“what” you want to do, and not “how” you want to do it. React, under the

hood, manages everything for you in a very optimized way.

We will discuss on how the React virtual DOM, reconciliation and other

optional advanced stuff works under the hood, in detail, in the last chapter.

Quick JS revision

Before we dive into the React ecosystem, we’d like to put some quick JS

things that you should definitely be aware of, while working with React.

Let’s take a quick look at this section for now and come back later as you

need.

this

this is surprisingly complicated for a lot of people in JavaScript. Keep in

mind that in a function, this always refers to how that function is called,

except for arrow functions, where this is lexically scoped:

function myName() {

return this.myname

}

const myNameButArrow = () =>console.log(this.myname)

const person1 = { myname: “Mehul”, myName }

const person2 = { myname: “James”, myName }

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