详解使用WebPack搭建React开发环境

npm init -y

npm i webpack

npm i react react-dom -s

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

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

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:['**/*.css','**/*.less','**/*.js','**/*.html','**/*.vue','**/*.scss']
      })
    ]:[]
  ]
}

 "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
 ]