参考

url-loader

配置

1.创建本地项目webpack-demo

mkdir webpack-demo
cd webpack-demo

2.在webpack-demo的根目录下创建package.json文件

npm init -y

3. 安装webpack依赖包

npm i webpack webpack-cli webpack-dev-server --save-dev

模块说明：

• webpack
webpack核心

• webpack-cli
webpack的脚手架（启动器）

• webpack-dev-server
  开发环境下用于实时加载依赖

4.修改package.json文件的scripts属性值,进行打包资源的配置

"scripts": {
    "dev": "webpack-dev-server --open --mode development",
    "build": "webpack --mode production"
  },

5.安装相关的loader

npm install  url-loader --save-dev

6.在webpack.config.js中配置

const path = require('path');
// 显示进程的完成进度
var ProgressBarPlugin = require('progress-bar-webpack-plugin');
// 设置进度字体颜色
const chalk = require('chalk');
// 以树图的方式展示打包后的文件
const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin;
// 输出html
const HtmlWebpackPlugin = require('html-webpack-plugin');
// 分离css代码
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
// 清空dist文件夹
const {
  CleanWebpackPlugin
} = require('clean-webpack-plugin');
module.exports = {
  mode: 'production',
  entry: {
    app: './src/app.js'
  },
  output: {
    path: path.resolve(__dirname, '../dist'),
    filename: '[name].[hash].min.js'
  },
  module: {
    rules: [{
        test: /\.jsx?$/,
        use: [{
          loader: 'babel-loader'
        }]
      },
      {
        test: /\.css$/,
        use: [
          // {
          //   loader: 'style-loader'
          // },
          MiniCssExtractPlugin.loader,
          {
            loader: 'css-loader'
          },
          {
            loader: 'postcss-loader'
          }
        ]
      },
      {
        test: /\.less$/,
        use: [
          // {
          //   loader: 'style-loader'
          // },
          MiniCssExtractPlugin.loader,
          {
            loader: 'css-loader'
          },
          {
            loader: 'less-loader'
          }
        ]
      },
      {
        test: /\.scss$/,
        use: [
          // {
          //   loader: 'style-loader'
          // },
          MiniCssExtractPlugin.loader,
          {
            loader: 'css-loader'
          },
          {
            loader: 'postcss-loader'
          },
          {
            loader: 'sass-loader'
          }
        ]
      },
      {
        test: /\.(jpg|png|jpe?g|gif|svg)(\?.*)?$/i,
        use: [
          {
            loader: 'url-loader',
            options: {
              outputPath: 'images/',// 输出目录
              name(file) {// 输出名称
                return '[hansh].[ext]'
              },
              limit: 5*1024
            }
          }
        ]
      },
      {
        test: /\.(eot|woff2?|ttf|svg)$/,
        use: [{
          loader: 'url-loader',
          options: {
            name: '[name]-[hash:5].min.[ext]',
            limit: 5000,
            publicPath: '../static/fonts/',
            outputPath: 'fonts/'
          }
        }]
      }
    ]
  },
  plugins: [
    new HtmlWebpackPlugin({
      title: 'Webpack Study Demo',
      filename: 'index.html', //指定生成的HTML文件名
      template: path.join(__dirname, '../public/index.html') // 指定模板路径
    }),
    
    new MiniCssExtractPlugin({
      filename: '[name].css',// 分离后的文件名
      chunkFilename: '[id].css',//
      ignoreOrder: false
    }),
    new CleanWebpackPlugin(),
    new ProgressBarPlugin({
      format: chalk.green('Progressing') + '[:bar]' + chalk.green(':percent') + '(:elapsed seconds)',
      clear: false
    }),
    new BundleAnalyzerPlugin()
  ]
}