课程：https://coding.imooc.com/class/chapter/150.html
第一章：介绍
第二章：知识储备
React开发环境
1.安装Nodejs
2.安装Visual Studio Code
安装create-react-app全局库，这是官方开发的一个react脚手架工具
npm install -g create-react-app
创建第一个react应用程序
#create-react-app创建一个示例项目
create-react-app react-demo
经过一段时间的等待，项目已经生成了
运行项目
cd react-demo
npm start
命令应该会自动打开浏览器，并打开http://localhost:3000
安装redux
npm install redux --save
弹出所有配置文件，将所有的配置文件显示出来，这个过程是不可逆的，会安装另外一些依赖
npm run eject #弹出自定义配置
第三章：react基础知识回顾
关于事件调用方法时，this的问题，解决方法有三个：
1：在constructor()构造方法中加入代码
class Yiying extends Component {
constructor(props) {
super(props);
this.state = {
solder: ['虎子', '柱子', '王根生']
}
//在构造函数加入bind
this.addSolder = this.addSolder.bind(this);
}
addSolder() {
this.setState({
solder: [...this.state.solder, '新兵' + Math.random()]
});
}
render() {
return <div>
一营营长，{this.props.leader}
<button onClick={this.addSolder}>新兵入伍</button>
<ul>
{this.state.solder.map(v => {
return <li key={v}>{v}</li>
})}
</ul>
</div>
}
}2：在rander方法中，使用箭头函数调用方法
class Yiying extends Component {
constructor(props) {
super(props);
this.state = {
solder: ['虎子', '柱子', '王根生']
}
}
addSolder() {
this.setState({
solder: [...this.state.solder, '新兵' + Math.random()]
});
}
render() {
return <div>
一营营长，{this.props.leader}
{/*在调用方法时加入箭头函数*/}
<button onClick={() => this.addSolder()}>新兵入伍</button>
<ul>
{this.state.solder.map(v => {
return <li key={v}>{v}</li>
})}
</ul>
</div>
}
}3：将方法函数修改为箭头函数
class Yiying extends Component {
constructor(props) {
super(props);
this.state = {
solder: ['虎子', '柱子', '王根生']
}
}
//修改方法为箭头函数
addSolder = () => {
this.setState({
solder: [...this.state.solder, '新兵' + Math.random()]
});
}
render() {
return <div>
一营营长，{this.props.leader}
<button onClick={this.addSolder}>新兵入伍</button>
<ul>
{this.state.solder.map(v => {
return <li key={v}>{v}</li>
})}
</ul>
</div>
}
}react生命周期
class App extends Component {
componentWillMount() {
console.log('====================================');
console.log('将要加载');
console.log('====================================');
}
componentDidMount() {
console.log('====================================');
console.log('已经加载');
console.log('====================================');
}
render() {
const boss = '李云龙';
console.log('====================================');
console.log('正在加载');
console.log('====================================');
return (
<div>
独立团，团长{boss}
<Yiying leader='张大喵'></Yiying>
<Qibinglian leader='孙德胜'></Qibinglian>
</div>
);
}
}在react的组件，如果是普通的组件，则会继承至react.Component
class Yiying extends Component {
constructor(props) {
super(props);
this.state = {
solder: ['虎子', '柱子', '王根生']
}
}
//修改方法为箭头函数
addSolder = () => {
this.setState({
solder: [...this.state.solder, '新兵' + Math.random()]
});
}
render() {
return <div>
一营营长，{this.props.leader}
<Button onClick={this.addSolder} type='primary'>新兵入伍</Button>
<List renderHeader={() => '士兵列表'}>
{this.state.solder.map(v => {
return <Item key={v}>{v}</Item>
})}
</List>
</div>
}
}如果该组件只有rander方法，不需要其他任何的事件等，可以使用以下写法，也是可以的
function Qibinglian(props) {
return <div>骑兵连连长{props.leader}</div>
}调用时，直接使用同样的方式
class App extends Component {
render() {
const boss = '李云龙';
return (
<div>
独立团，团长{boss}
<Yiying leader='张大喵'></Yiying>
<Qibinglian leader='孙德胜'></Qibinglian>//该组件只显示，不做其他事件等响应
</div>
);
}
}antd-mobile引用
npm install antd-mobile --save
//引用组件
import {Button} from 'antd-mobile'; //引用样式
import 'antd-mobile/dist/antd-mobile.css'; //组件
<Button onClick={this.addSolder} type='primary'>新兵入伍</Button>
如果想按需加载antd-mobile样式，可以在运行过npm run ejest后，安装一个插件
npm install babel-plugin-import --save-dev
生成的package.json中找到babel节点，修改为下内容
"babel": {
"presets": [
"react-app"
],
"plugins":[
["import", { "libraryName": "antd-mobile", "style": "css" }]
]
}, 这时，react组件中，就不再需要引用antd-mobile的css了
代码是为以下
import React, { Component } from 'react';
import { Button, List } from 'antd-mobile';
const Item = List.Item;
class App extends Component {
render() {
const boss = '李云龙';
return (
<div>
独立团，团长{boss}
<Yiying leader='张大喵'></Yiying>
<Qibinglian leader='孙德胜'></Qibinglian>
</div>
);
}
}
function Qibinglian(props) {
return <div>骑兵连连长{props.leader}</div>
}
class Yiying extends Component {
constructor(props) {
super(props);
this.state = {
solder: ['虎子', '柱子', '王根生']
}
}
//修改方法为箭头函数
addSolder = () => {
this.setState({
solder: [...this.state.solder, '新兵' + Math.random()]
});
}
render() {
return <div>
一营营长，{this.props.leader}
<Button onClick={this.addSolder} type='primary'>新兵入伍</Button>
<List renderHeader={() => '士兵列表'}>
{this.state.solder.map(v => {
return <Item key={v}>{v}</Item>
})}
</List>
</div>
}
}
export default App;App.js
{
"name": "react-demo",
"version": "0.1.0",
"private": true,
"dependencies": {
"antd-mobile": "^2.1.3",
"autoprefixer": "7.1.6",
"babel-core": "6.26.0",
"babel-eslint": "7.2.3",
"babel-jest": "20.0.3",
"babel-loader": "7.1.2",
"babel-preset-react-app": "^3.1.0",
"babel-runtime": "6.26.0",
"case-sensitive-paths-webpack-plugin": "2.1.1",
"chalk": "1.1.3",
"css-loader": "0.28.7",
"dotenv": "4.0.0",
"eslint": "4.10.0",
"eslint-config-react-app": "^2.0.1",
"eslint-loader": "1.9.0",
"eslint-plugin-flowtype": "2.39.1",
"eslint-plugin-import": "2.8.0",
"eslint-plugin-jsx-a11y": "5.1.1",
"eslint-plugin-react": "7.4.0",
"extract-text-webpack-plugin": "3.0.2",
"file-loader": "1.1.5",
"fs-extra": "3.0.1",
"html-webpack-plugin": "2.29.0",
"jest": "20.0.4",
"object-assign": "4.1.1",
"postcss-flexbugs-fixes": "3.2.0",
"postcss-loader": "2.0.8",
"promise": "8.0.1",
"raf": "3.4.0",
"react": "^16.2.0",
"react-dev-utils": "^4.2.1",
"react-dom": "^16.2.0",
"redux": "^3.7.2",
"style-loader": "0.19.0",
"sw-precache-webpack-plugin": "0.11.4",
"url-loader": "0.6.2",
"webpack": "3.8.1",
"webpack-dev-server": "2.9.4",
"webpack-manifest-plugin": "1.3.2",
"whatwg-fetch": "2.0.3"
},
"scripts": {
"start": "node scripts/start.js",
"build": "node scripts/build.js",
"test": "node scripts/test.js --env=jsdom"
},
"jest": {
"collectCoverageFrom": [
"src/**/*.{js,jsx,mjs}"
],
"setupFiles": [
"<rootDir>/config/polyfills.js"
],
"testMatch": [
"<rootDir>/src/**/__tests__/**/*.{js,jsx,mjs}",
"<rootDir>/src/**/?(*.)(spec|test).{js,jsx,mjs}"
],
"testEnvironment": "node",
"testURL": "http://localhost",
"transform": {
"^.+\\.(js|jsx|mjs)$": "<rootDir>/node_modules/babel-jest",
"^.+\\.css$": "<rootDir>/config/jest/cssTransform.js",
"^(?!.*\\.(js|jsx|mjs|css|json)$)": "<rootDir>/config/jest/fileTransform.js"
},
"transformIgnorePatterns": [
"[/\\\\]node_modules[/\\\\].+\\.(js|jsx|mjs)$"
],
"moduleNameMapper": {
"^react-native$": "react-native-web"
},
"moduleFileExtensions": [
"web.js",
"mjs",
"js",
"json",
"web.jsx",
"jsx",
"node"
]
},
"babel": {
"presets": [
"react-app"
],
"plugins": [
[
"import",
{
"libraryName": "antd-mobile",
"style": "css"
}
]
]
},
"eslintConfig": {
"extends": "react-app"
},
"devDependencies": {
"babel-plugin-import": "^1.6.3"
}
}package.json
第四章：redux基础
React的默认方法
未完待续