webpack.config.js

const path = require("path");
const CopyWebpackPlugin = require("copy-webpack-plugin");
const HtmlWebpackPlugin = require("html-webpack-plugin");

delete require.cache[require.resolve("./env")];
const { env } = require("./env");

module.exports = {
  resolve: {
    alias: {
      "lit-element": path.resolve("./node_modules/lit-element"),
      graphql: path.resolve("./node_modules/graphql"),
      "lit-html": path.resolve("./node_modules/lit-html"),
    },
  },
  entry: ["babel-polyfill", env.entry],
  devServer: {
    historyApiFallback: true,
    port: 8084,
  },
  mode: "production",
  module: {
    rules: [
      {
        test: /\.js$/,
        use: {
          loader: "babel-loader",
          options: {
            presets: [["@babel/preset-env", { targets: { ie: "11" } }]],
            plugins: ["@babel/plugin-syntax-dynamic-import"],
          },
        },
      },
    ],
  },
  plugins: [
    new CopyWebpackPlugin(["node_modules/@webcomponents/webcomponentsjs/**"]),
    new HtmlWebpackPlugin({
      chunksSortMode: "none",
      template: "index.html",
    }),
  ],
};