webpack.config.js

const path = require("path");
const CopyPlugin = require("copy-webpack-plugin");
const WasmPackPlugin = require("@wasm-tool/wasm-pack-plugin");

const dist = path.resolve(__dirname, "dist");

module.exports = {
  mode: "production",
  entry: {
    index: "./js/index.js"
  },
  output: {
    path: dist,
    filename: "[name].js"
  },
  devServer: {
    contentBase: dist,
  },
  node: {
    fs: 'empty'
  },
  plugins: [
    new CopyPlugin([
      path.resolve(__dirname, "static")
    ]),

    new WasmPackPlugin({
      crateDirectory: __dirname,
      outName: "compiler"
    }),
  ],
  module: {
    rules: [
      {
        test: /\.css$/i,
        use: ["style-loader", "css-loader"],
      },
      {
        test: /\.(js|jsx)$/,
        exclude: /node_modules/,
        use: [{
          loader: 'babel-loader',
          options: {
            presets: [
              ['@babel/preset-env', {
                "targets": "defaults"
              }],
              '@babel/preset-react'
            ]
          }
        }],
      }
    ]
  },
  resolve: {
    extensions: [".js", ".jsx"]
  }
};