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webpack.prod.js
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webpack.prod.js
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const { merge } = require("webpack-merge");
const common = require("./webpack.common.js");
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const CssMinimizerPlugin = require("css-minimizer-webpack-plugin");
const TerserPlugin = require("terser-webpack-plugin");
const ImageMinimizerPlugin = require("image-minimizer-webpack-plugin");
module.exports = merge(common, {
mode: "production",
devtool: "source-map",
module: {
rules: [
{
test: /\.(css)$/,
use: [
MiniCssExtractPlugin.loader,
{
loader: "css-loader",
options: {
importLoaders: 2,
sourceMap: false,
modules: false,
},
},
],
},
],
},
plugins: [
// Extracts CSS into separate files
new MiniCssExtractPlugin({
filename: "styles/[name].[contenthash].css",
chunkFilename: "[id].css",
}),
],
optimization: {
minimize: true,
minimizer: [
new CssMinimizerPlugin({
minimizerOptions: {
preset: [
"default",
{
discardComments: { removeAll: true },
},
],
},
}),
new TerserPlugin({
test: /\.js(\?.*)?$/i,
// Use multi-process parallel running to improve the build speed
// Default number of concurrent runs: os.cpus().length - 1
parallel: 2,
minify: (file, sourceMap) => {
// https://github.com/mishoo/UglifyJS2#minify-options
const uglifyJsOptions = {
/* your `uglify-js` package options */
mangle: true,
compress: true,
};
if (sourceMap) {
uglifyJsOptions.sourceMap = {
content: sourceMap,
};
}
return require("uglify-js").minify(file, uglifyJsOptions);
},
// `terserOptions` options will be passed to `uglify-js`
// Link to options - https://github.com/mishoo/UglifyJS#minify-options
terserOptions: {
format: {
comments: false,
},
},
extractComments: false,
}),
new ImageMinimizerPlugin({
minimizer: {
implementation: ImageMinimizerPlugin.imageminMinify,
options: {
plugins: [
["gifsicle", { interlaced: true }],
["jpegtran", { progressive: true }],
["optipng", { optimizationLevel: 7 }],
],
},
},
// Disable `loader`
loader: false,
}),
],
runtimeChunk: {
name: "runtime",
},
splitChunks: {
cacheGroups: {
commons: {
test: /[\\/]node_modules[\\/](react|react-dom|moment|@mui|@emotion|@fontsource|@babel|src)[\\/]/,
// cacheGroupKey here is `commons` as the key of the cacheGroup
name(module, chunks, cacheGroupKey) {
const moduleFileName = module
.identifier()
.split("/")
.reduceRight((item) => item);
const allChunksNames = chunks.map((item) => item.name).join("~");
return `${cacheGroupKey}-${allChunksNames}-${moduleFileName}`;
},
chunks: "all",
usedExports: true,
priority: -20,
reuseExistingChunk: true,
},
},
},
removeEmptyChunks: true,
},
performance: {
hints: false,
maxEntrypointSize: 512000,
maxAssetSize: 512000,
},
});