now I have two projects, one of which does not consider compatibility, so configure it casually

const path = require("path");
const MiniCssExtractPlugin = require("mini-css-extract-plugin");

const getConfig = require("./build/getConfig");

const ROOT_PATH = path.resolve(__dirname, ".");
const build = "dist";
const BUILD_PATH = path.resolve(ROOT_PATH, build);
let PUBLIC_PATH = "/";

const isBuild = process.argv.some(argument => argument === "-p");

const { devtool, devServer, plugins } = getConfig(isBuild);

module.exports = {
    devtool,
    entry: {
        "polyfill": "babel-polyfill",
        "app": "./src/app.js",
    },
    output: {
        path: BUILD_PATH,
        publicPath: PUBLIC_PATH,
        filename: "js/[hash].[name].js",
        chunkFilename: "js/[hash].[name].chunk.js",
    },
    module: {
        rules: [{
            test: /\.js$/,
            use: {
                loader: "babel-loader?cacheDirectory=true",
                options: {
                    "presets": [
                        "env",
                        "react"
                    ],
                    "plugins": [
                        // 
                        "transform-decorators-legacy",
                        "transform-object-rest-spread",
                        // class    handleClick = () => {}
                        "transform-class-properties",
                        //  import
                        "syntax-dynamic-import"
                    ]
                }
            }
        }, {
            test: /\.less/,
            use: [MiniCssExtractPlugin.loader, "css-loader?modules&sourceMap&localIdentName=[name]__[local]__[hash:base64:5]", "less-loader?javascriptEnabled"]
        }, {
            test: /\.css/,
            use: ["style-loader", "css-loader"],
        }, {
            test: /\.(jpg|png|gif)$/,
            use: "url-loader?limit=8192&name=images/[hash:8].[name].[ext]",
            exclude: /node_modules/
        }, {
            test: /\.(woff|woff2|eot|ttf|svg)$/,
            loader: "url-loader?limit=100000"
        }]
    },
    externals: {
        /**
         *  webpack  react  react-dom , html 
         */
        "react": "React",
        "react-dom": "ReactDOM"
    },
    "mode": process.env.mode || "development",
    devServer,
    resolve: {
        /**
         * ,  js  jsx 
         */
        extensions: [".js", ".jsx", ".less"],
        alias: {
            "common": path.resolve(__dirname, "./src/components/common"),
            "HOC": path.resolve(__dirname, "./src/components/highOrderComponents"),
            "constants": path.resolve(__dirname, "./constants"),
            "tool": path.resolve(__dirname, "./util")
        },

    },
    plugins: plugins
}

in this case, the source map file will display very well

,,

(IE8),

,source,

, VM, ,log

, command+p, ,

?