添加OptimizeCssAssetsPlugin时，Webpack不会缩小.js文件（无作用）

Question

在生产模式下，我的webpack压缩了.js（应该压缩）。但是我还需要最小化.css，为此，我必须使用OptimizeCssAssetsPlugin。当我使用它时，它将最小化我的.css，但随后我的.js仍保持最小化。

我的猜测是，当我使用优化（在“模块和插件”旁边）时，js缺少了一些东西，因为没有整个“优化”块就可以了。那是什么为什么？

const path = require('path');
const HtmlWebPackPlugin = require("html-webpack-plugin");
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const WriteFilePlugin = require("write-file-webpack-plugin");
const OptimizeCssAssetsPlugin = require('optimize-css-assets-webpack-plugin');

module.exports = {
    entry: './src/index.js',
    output: {
        path: path.join(__dirname, '/dist'),
        filename: 'bundle.js',
        publicPath: '/'
    },
    devtool: 'source-map',
    module: {
        rules: [
            {
                test: /\.js$/,
                exclude: /node_modules/,
                use: {
                    loader: "babel-loader"
                }
            },
            {
                test: /\.(sa|sc|c)ss$/,
                exclude: /node_modules/,
                use: [MiniCssExtractPlugin.loader, "css-loader", "sass-loader"]
            }
        ]
    },
    plugins: [
        new HtmlWebPackPlugin({
            template: "./demo/index.html",
            filename: "index.html", 
            inject: false
        }),
        new MiniCssExtractPlugin({
            filename: "style.css"
        }),
        new WriteFilePlugin() 
    ],
    optimization: {
        minimizer: [
          new OptimizeCssAssetsPlugin(), 
        ],
      },
};

Answer 1

请查看MiniCssExtractPlugin文档的生产配置：

虽然webpack 5可能内置了CSS最小化器，但是对于webpack 4，您需要自带。要缩小输出，请使用诸如optimize-css-assets-webpack-plugin之类的插件。设置optimization.minimizer会覆盖webpack提供的默认值，因此请确保还指定一个JS最小化器...

问候，

const TerserJSPlugin = require('terser-webpack-plugin');

....

optimization: {
    minimizer: [
        // Minify js files:
        // (TerserJS is webpack default minifier but we have to specify it explicitly 
        // as soon as we include more minifiers)
        new TerserJSPlugin({}),
        // Minify css files:
        new OptimizeCSSAssetsPlugin(),
    ],
},