Yarn init -y

---

Yarn add webpack webpack-cli -d

---

Create /public/index.html/SRC /index.jsx/SRC /index.less and write the content in less.

// /src/index.jsx
import './index.less'
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// /src/index.less
html.body{
    font-size: 16px;
    button{
        color: red; }}Copy the code

---

Yarn add style-loader CSS-loader less less-loader-d

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Five, the newly built/webpack webpack. Config. Js

To extract CSS from JS, use mini-CSs-extract-plugin To use HTML templates, automatically generate HTML, automatically import JS, and additional custom properties, use htMl-webpack-plugin

yarn add mini-css-extract-plugin html-webpack-plugin -D
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Go to webpack Module >rules and plugins and get the following.

// webpack.config.js

const path = require('path');
/ / HTML templates
const htmlWebpackPlugin = require('html-webpack-plugin');
/ / CSS to pull away
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
// Relative path becomes absolute path
const resolvePath = (_path) = > path.resolve(__dirname, _path);
module.exports = {
    mode: 'development'.entry: resolvePath('.. /src/index.jsx'),
    output: {
        path: resolvePath('.. /dist'),
        filename: '[name].bundle.js',},module: {rules:[
            {
                test: /\.css$/,
    -              // use: ['style-loader', 'css-loader']
    +              use: [MiniCssExtractPlugin.loader, 'css-loader'] {},test: /\.less$/,
     -             // use: ['style-loader', 'css-loader', 'less-loader']
     +             use: [MiniCssExtractPlugin.loader, 'css-loader'.'less-loader']]}},plugins: [new htmlWebpackPlugin({
            template: resolvePath('.. /public/index.html'),
            filename: 'index.html'.title: 'React App' // Corresponds to the title of the template HTML
        }),
        new MiniCssExtractPlugin({
            filename:'[name].[hash:8].css' // The generated CSS file name}})]Copy the code

---

/ SRC /index.html (ejS template syntax)

    <title><%=htmlWebpackPlugin.options.title%></title>
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Set package.json to yarn build =>dist

"scripts": {
    "build": "webpack --config ./webpack/webpack.config.js"
  }
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Here. The CSS and LESS are packaged.

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8. To enable the CSS to be compatible with multiple browsers, you need to add CSS prefixes, install PostCSS-Loader, and use Autoprefixer to automatically fill the prefixes.

yarn add postcss-loader autoprefixer -D
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---

Update webpack.config.js=>modele=>rules.

module: {rules:[
            {
                test: /\.css$/,
-                // use: [MiniCssExtractPlugin.loader, 'css-loader']
+                use: [MiniCssExtractPlugin.loader, 'css-loader'.'postcss-loader'] {},test: /\.less$/,
-               // use: [MiniCssExtractPlugin.loader, 'css-loader', 'less-loader']
+               use: [MiniCssExtractPlugin.loader, 'css-loader'.'postcss-loader'.'less-loader']]}},Copy the code

---

10. Create /postcss.config.js

 + module.exports = {
 +     plugins:{
 +         autoprefixer: require('autoprefixer'+} +}Copy the code

Run YARN Build and check the CSS. Mainstream browser prefixes are automatically added at this point.

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Install yarn add clean-webpack-plugin -d. Configuration is as follows

// webpack.config.js
 + const { CleanWebpackPlugin } = require('clean-webpack-plugin');
 plugins:[
     .
     .
     .
 + new CleanWebpackPlugin()
 ]
 
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The production environment required more configuration of some of the things we did during development (such as hot updates), and the production environment required compression of the code. A distinction needs to be made between development and production environments.

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12, new/webpack webpack. Dev. Config. Js/webpack webpack. Prod. Config. Js. Here we use webpack-merge to merge differentiated files.

yarn add webpack-merge -D
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// Webpack folder
+      webpack.dev.config.js
+      webpack.prod.config.js
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---

Export the public configuration webpack.config.js

// webpack.config.js
 - module.exports = {
 + const baseConfig = {
    
    }
            .
            .
            .
 + module.exports = {
 +     resolvePath,
 +     baseConfig
 + }
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Configure the development environment

yarn add webpack-dev-server -D
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// webpack.dev.config.js
const { merge } = require('webpack-merge');
const {
    resolvePath,
    baseConfig
} =require('./webpack.config')
module.exports = merge(baseConfig,{
    mode:'development'.devtool: 'inline-source-map'.devServer: {
        host:'127.0.0.1'.port: 9000.hot: true.open: true}})Copy the code

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Configure the production environment because we are going to compress CSS. So use csS-minimizer-webpack-plugin

yarn add css-minimizer-webpack-plugin -D
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1, yarn add css-minimizer-webpack-plugin -d// webpack.prod.config.js
const { merge } = require('webpack-merge');
const CssMinimizerPlugin = require("css-minimizer-webpack-plugin");
const {
    resolvePath,
    baseConfig
} =require('./webpack.config')
module.exports = merge(baseConfig,{
    mode:'production'.optimization: {
        minimizer: [
          new CssMinimizerPlugin(),
        ],
      },
})
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Modify the startup command

// package.json
  "scripts": {-"build": "webpack --config ./webpack/webpack.config.js",
  +  "build": "webpack --config ./webpack/webpack.prod.config.js",
  +  "start": "webpack-dev-server --config ./webpack/webpack.dev.config.js"
  }
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17. To package advanced syntax. You need to use Babel. You also need to translate the React code. Install the React core dependencies as well

yarn add react react-dom @babel/core @babel/polyfill @babel/preset-env @babel/preset-react -D 
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---

Update module=>rules

    module: {rules:[
            {
                test: /\.css$/,
                use: [MiniCssExtractPlugin.loader, 'css-loader'.'postcss-loader'] {},test: /\.less$/,
                use: [MiniCssExtractPlugin.loader, 'css-loader'.'postcss-loader'.'less-loader']
            },
  +         {
  +             test: /\.jsx$/,
  +             use: "babel-loader"
  +         },
  +          {
  +              test: /\.svg$/,
  +              type: 'asset/resource'+}},Copy the code

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19. Create /babel.config.json and configure it

{
    "presets": ["@babel/preset-react"."@babel/preset-env"]}Copy the code

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Finally, write the React code. yyds.

yarn start
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This is a simple configuration. More configurations will be updated later. If write wrong place hope big guy points out. / fist up // fist up /