webpack.config.js

const path = require("path");
const webpack = require("webpack");
const {merge} = require("webpack-merge");
const {CleanWebpackPlugin} = require("clean-webpack-plugin");
const BundleAnalyzerPlugin = require("webpack-bundle-analyzer").BundleAnalyzerPlugin;
const package = require("./package.json");

module.exports = (env) => {
    const IS_ANALYZE = env && env.analyze;
    const common = {
        entry: {
            filename: path.resolve(__dirname, "./src/main.ts"),
            //filename: path.resolve(__dirname, './src/tst.js'),
            //hoge: path.resolve(__dirname, './src/csa-parser.pegjs')
        },
        module: {
            rules: [
                {
                    test: /\.ts$/,
                    use: "ts-loader",
                    exclude: /node_modules/,
                },
                {
                    test: /\.pegjs$/,
                    use: "pegjs-loader",
                },
            ],
        },
        resolve: {
            extensions: [".ts", ".js", ".pegjs"],
        },
    };

    // For browsers
    const BUNDLE_DIR = path.resolve(__dirname, "./bundle");
    const bundle = merge(common, {
        output: {
            library: "JSONKifuFormat",
            filename: `json-kifu-format-${package.version}.min.js`,
            path: BUNDLE_DIR,
        },
        plugins: [new CleanWebpackPlugin()],
        optimization: {
            minimize: true,
        },
    });
    if (IS_ANALYZE) {
        bundle.plugins.push(new BundleAnalyzerPlugin());
    }

    // For npm module
    const DIST_DIR = path.resolve(__dirname, "./dist");
    const dist = merge(common, {
        output: {
            libraryTarget: "commonjs2",
            filename: "json-kifu-format.js",
            path: DIST_DIR,
        },
        plugins: [new CleanWebpackPlugin()],
    });
    return [bundle, dist];
};