详解使用WebPack搭建React开发环境

第一步、基础环境

初始化

项目初始化

npm init -y

安装webpack

npm i webpack

安装react

npm i react react-dom -s

项目基础框架

入口文件(src/index.js)

import React from 'react'
import {render} from 'react-dom'
import App from './App'
render(,document.getElementById('root'))

主组件(src/App.js)

import React,{Component} from 'react'
class App extends Component{
  constructor(){
    super()
  }
  redner(){
    return(
      
 App Module
      
    )
  }
}  

webpack.config.js

const path = require('path')
const StyleLintPlugin = require('stylelint-webpack-plugin')
const STYLELINTENABLE = true
module.exports = {
  mode:'development',
  entry:'./src/index.js',
  output:{
    path:path.resolve(__dirname,'build'),
    filename:'bundle.js'
  },
  module:{
    rules:[
      //处理js/jsx
      {
 test:/.jsx?/i,
 use:{
   loader:'bebel-loader',
   options:{
     presets:['@babel/preset-react']
   }
 }
      },
      //处理css
      {
 test:/.css$/i,
 use:['style-loader','css-loader',{
   loader:'postcss-loader',
   options:{
     plugins:require('autoprefixer')
   }
 }]
      },
      //处理图片资源
      {
 test:/.(png|jpg|gif)$/i,
 use:{
   loader:'url-loader',
   options:{
     outputPath:'imgs/',
     limit:10*1024
   }
 }
      },
      //处理字体文件
      {
 test:/.(eot|svg|ttf|woof|woof2)$/i,
 use:{
   loader:'url-loader',
   options:{
     outputPath:'fonts/',
     limit:10*1024
   }
 }
      },
      //less
      {
 test:/.less$/i,
 use:['style-loader','css-loader','less-loader']
      },

    ]
  },
  devtool:'source-map',
  plugins:[
    ...STYLELINTENABLE ?[
      new StyleLintPlugin({
 files:['***.less','***.html','***.scss']
      })
    ]:[]
  ]
}

webpack.config.js

 "stylelint": {
  "extends": "stylelint-config-standard"
 },
 "browserslist":[
  "> 0.5%",//市场占有率大于百分之零点5
  "last 2 version",//最后两个版本
  "not dead"//还没有die
 ]

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