const CompressionPlugin = require('compression-webpack-plugin');
module.exports = {
    publicPath: './',
    outputDir: './www',
    assetsDir: 'static',
    productionSourceMap: false,
    lintOnSave: true,
    filenameHashing: true,
    devServer: {
        https: false,
        port: 4562
    },
    configureWebpack: () => {
        if (process.env.NODE_ENV === 'production') {
            return {
                plugins: [
                    new CompressionPlugin({
                        minRatio: 1, // 压缩率小于1才会压缩
                        test: /\.js$|.html$|\.css$/, // 匹配文件名
                        threshold: 10240, // 对超过10k的文件进行压缩
                        deleteOriginalAssets: false // 是否删除原文件                        
                    })
                ],
                optimization: {
                    runtimeChunk: 'single',
                    splitChunks: {
                        chunks: 'all',
                        maxInitialRequests: Infinity,
                        minSize: 20000,
                        cacheGroups: {
                            vendor: {
                                test: /[\\/]node_modules[\\/]/,
                                name(module) {
                                    // get the name. E.g. node_modules/packageName/not/this/part.js
                                    // or node_modules/packageName
                                    const packageName = module.context.match(/[\\/]node_modules[\\/](.*?)([\\/]|$)/)[1]
                                    // npm package names are URL-safe, but some servers don't like @ symbols
                                    return `npm.${packageName.replace('@', '')}`
                                }
                            }
                        }
                    }
                }
            }
        }
    }

}