轻松学 Webpack 4 免费视频教程 #28 如何打包图片（包含规划编译出的文件的目录结构）

https://github.com/webpack-contrib/file-loader

https://github.com/webpack-contrib/url-loader

src/App.js

import React from 'react';
import ReactDOM from 'react-dom';
import './index.css';
import logo from './logo.png';

const App = () => {
  return (
    <div>
      <p>React here! Hello, rails365</p>
      <img src={ logo } width={ 300 } />
      <div className="image"></div>
    </div>
  )
}

export default App;

ReactDOM.render(<App />, document.getElementById("app"));

src/index.css

body {
  line-height: 2;
  color: blue;
}

div.image {
  height: 600px;
  background: url("./logo.png") no-repeat;
}

webpack.config.js

const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const CleanWebpackPlugin = require('clean-webpack-plugin');
const devMode = process.env.NODE_ENV !== 'production';

let pathsToClean = [
  'dist'
]

module.exports = {
  // entry: "./src/index.js",
  entry: {
    // app: ["@babel/polyfill", './src/index.js'],
    app: './src/index.js',
    hello: './src/hello.js'
  },
  devtool: false,
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: "js/[name]-[hash].bundle.js"
  },
  module: {
    rules: [
      {
        test: /\.m?js$/,
        exclude: /(node_modules|bower_components)/,
        use: {
          loader: 'babel-loader',
          // options: {
          //   presets: [['@babel/preset-env', { "debug": true }]],
          //   plugins: [["@babel/plugin-proposal-decorators", { "decoratorsBeforeExport": true }]]
          // }
          // options: {
          //   plugins: [require('@babel/plugin-transform-arrow-functions')]
          // }
        }
      },
      {
        test: /\.css$/,
        use: [
          devMode ? 'style-loader' : MiniCssExtractPlugin.loader,
          'css-loader'
        ]
      },
      {
        test: /\.(scss|sass)$/,
        use: [
          devMode ? 'style-loader' : MiniCssExtractPlugin.loader, // creates style nodes from JS strings
          "css-loader", // translates CSS into CommonJS
          "sass-loader" // compiles Sass to CSS, using Node Sass by default
        ]
      },
      {
        test: /\.less$/,
        use: [
          devMode ? 'style-loader' : MiniCssExtractPlugin.loader, // creates style nodes from JS strings
          'css-loader', // translates CSS into CommonJS
          'less-loader' // compiles Less to CSS
        ]
      },
      {
        test: /\.(png|jpg|gif|svg)$/,
        use: [
          {
            loader: 'file-loader',
            options: {
              name: '[name].[ext]',
              outputPath: 'images/'
            }
          }
        ]
      }
    ]
  },
  plugins: [
    new HtmlWebpackPlugin({
      title: 'Admin',
      filename: 'admin.html',
      template: 'public/index.html',
      chunks: ["hello"]
    }),
    new HtmlWebpackPlugin({
      title: 'Index',
      filename: 'index.html',
      template: 'public/index.html',
      chunks: ["app"]
    }),
    new MiniCssExtractPlugin({
      // Options similar to the same options in webpackOptions.output
      // both options are optional
      filename: devMode ? 'css/[name].css' : 'css/[name].[hash].css',
      chunkFilename: devMode ? 'css/[id].css' : 'css/[id].[hash].css',
    }),
    new CleanWebpackPlugin(pathsToClean)
  ],
  devServer: {
    contentBase: path.join(__dirname, 'dist'),
    compress: true,
    port: 9000
  },
  mode: 'development'
}