webpack基本配置一基础配置

webpack.config.js

const path = require('path');
const { CleanWebpackPlugin } = require('clean-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const webpack = require('webpack');

module.exports = {
    entry: './src/index.js',
    output: {
        filename: '[name].[hash].js',
        path: path.resolve(__dirname, 'dist')
    },
    //use inline-source-map for development
    devtool: 'inline-source-map',
    //use source-map for production
    //devtool: 'source-map'
    devServer: {
        contentBase: './dist',
        hot: true
    },
    module: {
        rules:[
            {
                test: /\.js$/,
                loader: 'babel-loader',
                include: [path.resolve(__dirname, 'src')],
                exclude: [path.resolve(__dirname, 'node-modules')]
            },
            {
                test: /\.(gif|png|jpe?g|svg)$/,
                use:[
                    {
                        loader: 'url-loader',
                        options: {
                            limit: 8000
                        }
                    },{
                        loader: 'image-webpack-loader',
                        options: {
                            mozjpeg: {
                                progressive: true,
                                quality: 90
                            },
                            optipng: {
                                enabled: true
                            },
                            pngquant: {
                                quality: '65-90',
                                speed: 4
                            },
                            gifsicle: {
                                interlaced: false
                            }
                        }
                    }
                ]
            },
            {
                test: /\.css$/,
                use: [
                    'style-loader',
                    'css-loader'
                ]
            }
        ]
    },
    optimization: { //commonChunkPlugins
        runtimeChunk: 'single',
        splitChunks: { //分割代码块
            cacheGroups: { //缓存组
                common: {
                    chunks: 'initial',
                    minSize: 0,
                    minChunks: 2
                },
                vendor: {
                    priority: 1,
                    test: /[\\/]node_modules[\\/]/,
                    name: 'vendors',
                    chunks: 'all',
                    minSize: 0,
                    minChunks: 2
                }
            }
        }
    },
    plugins: [
        new CleanWebpackPlugin(),
        new HtmlWebpackPlugin({
            hash: true,
            template: './src/index.html',
            filename: 'index.html'
        }),
        new webpack.NamedModulesPlugin(),//打印更新的模块路径
        new webpack.HotModuleReplacementPlugin()//热更新插件
    ]
}

.babelrc

{
    "presets": [
        "@babel/preset-env"
    ]
}