webpack-cli VS mini-css-extract-plugin

Unable to load '@webpack-cli/serve' command

webpack-cli(v5.0.1): enables you to use the command-line interface of the Webpack

$ npm run build > [email protected] build > webpack CLI for webpack must be installed. webpack-cli (https://github.com/webpack/webpack-cli) We will use "npm" to install the CLI via "npm install -D webpack-cli". Do you want to install 'webpack-cli' (yes/no): yes

$ npx webpack --force CLI for webpack must be installed. webpack-cli (https://github.com/webpack/webpack-cli) We will use "npm" to install the CLI via "npm install -D webpack-cli". Do you want to install 'webpack-cli' (yes/no): y Installing 'webpack-cli' (running 'npm install -D webpack-cli')... npm ERR! code ERESOLVE npm ERR! ERESOLVE could not resolve npm ERR! npm ERR! While resolving: [email protected] npm ERR! Found: [email protected] npm ERR! node_modules/webpack npm ERR! peer webpack@"^5.1.0" from [email protected] npm ERR! node_modules/terser-webpack-plugin npm ERR! terser-webpack-plugin@"^5.1.3" from [email protected] npm ERR! dev webpack@"^5.72.1" from the root project npm ERR! 1 more (webpack-cli) npm ERR! npm ERR! Could not resolve dependency: npm ERR! peer webpack@"1 || 2 || ^2.1.0-beta || ^2.2.0-rc" from [email protected] npm ERR! node_modules/babel-loader npm ERR! dev babel-loader@"^6.2.1" from the root project npm ERR! npm ERR! Conflicting peer dependency: [email protected] npm ERR! node_modules/webpack npm ERR! peer webpack@"1 || 2 || ^2.1.0-beta || ^2.2.0-rc" from [email protected] npm ERR! node_modules/babel-loader npm ERR! dev babel-loader@"^6.2.1" from the root project npm ERR! npm ERR! Fix the upstream dependency conflict, or retry npm ERR! this command with --force, or --legacy-peer-deps npm ERR! to accept an incorrect (and potentially broken) dependency resolution. npm ERR! npm ERR! See /home/oog/.npm/eresolve-report.txt for a full report. npm ERR! A complete log of this run can be found in: npm ERR! /home/oog/.npm/_logs/2022-06-01T19_32_07_335Z-debug-0.log undefined

// Generated using webpack-cli https://github.com/webpack/webpack-cli const path = require("path"); const HtmlWebpackPlugin = require("html-webpack-plugin"); const MiniCssExtractPlugin = require("mini-css-extract-plugin"); const isProduction = process.env.NODE_ENV == "production"; const stylesHandler = isProduction ? MiniCssExtractPlugin.loader : "style-loader"; const config = { entry: "./src/index.ts", output: { path: path.resolve(__dirname, "dist"), }, devServer: { open: true, host: "localhost", }, plugins: [ new HtmlWebpackPlugin({ template: "index.html", }), // Add your plugins here // Learn more about plugins from https://webpack.js.org/configuration/plugins/ ], module: { rules: [ { test: /\.(ts|tsx)$/i, loader: "ts-loader", exclude: ["/node_modules/"], }, { test: /\.css$/i, use: [stylesHandler, "css-loader"], }, { test: /\.s[ac]ss$/i, use: [stylesHandler, "css-loader", "sass-loader"], }, { test: /\.(eot|svg|ttf|woff|woff2|png|jpg|gif)$/i, type: "asset", }, // Add your rules for custom modules here // Learn more about loaders from https://webpack.js.org/loaders/ ], }, resolve: { extensions: [".tsx", ".ts", ".js"], }, }; module.exports = () => { if (isProduction) { config.mode = "production"; config.plugins.push(new MiniCssExtractPlugin()); } else { config.mode = "development"; } return config; };

Let's install webpack and webpack-cli, we'll be using Webpack 5

webpack/webpack-cli repo issue: Error when run npm start: Class constructor ServeCommand cannot be invoked without 'new' #2272

mini-css-extract-plugin

In my production file I'm using mini-css-extract-plugin to create a final css file rather than have them loaded in my bundle.js file.

The css webpack extract plugin gets 12 million downloads per week https://www.npmjs.com/package/mini-css-extract-plugin

This shouldn't be the case, at least not if you're doing it "properly". For dev builds, sure, but for production, it's better to use something like mini-css-extract-plugin to extract the bundled CSS into separate files. Then for files in your main entrypoint, the CSS will be loaded via tags, and files loaded via code-splitting, the tags will be added to the DOM dynamically.

Since I'm using Webpack 4, I am also using mini-css-extract-plugin. I started down the path of creating a splitChunks in my webpack config.

When in Webpack entry are defined style files like SCSS/SASS and used the mini-css-extract-plugin then will be generated unexpected empty js files.

According to its Github page this is deprecated and you should use this instead https://github.com/webpack-contrib/mini-css-extract-plugin

npm WARN deprecated [email protected]: Deprecated. Please use https://github.com/webpack-contrib/mini-css-extract-plugin

If you have a webpack configuration for production then you'll need a different configuration for using CSS. At first, install mini-css-extract-plugin