webpack.common.js

const path = require("path");

module.exports = {
  stats: "errors-only",

  entry: { main: "./src/index.js" },

  output: {
    library: "react-wp-form",
    libraryTarget: "amd",
    path: path.join(__dirname, "dist"),
    globalObject: "this",
  },

  module: {
    rules: [
      {
        test: /\.js/,
        exclude: /(node_modules)/,
        use: {
          loader: "babel-loader",
        },
      },
      {
        test: /\.scss$/,
        use: [
          {
            loader: "file-loader",
            options: {
              name: "[name].css",
            },
          },
          {
            loader: "extract-loader",
          },
          {
            loader: "css-loader?-url",
          },
          {
            loader: "sass-loader",
          },
        ],
      },
    ],
  },

  resolve: {
    extensions: [".js", ".jsx"],
  },

  externals: {
    react: {
      root: "React",
      commonjs2: "react",
      commonjs: "react",
      amd: "react",
    },
    "react-dom": {
      root: "ReactDOM",
      commonjs2: "react-dom",
      commonjs: "react-dom",
      amd: "react-dom",
    },
    "react-router-dom": {
      root: "ReactRouterDOM",
      commonjs2: "react-router-dom",
      commonjs: "react-router-dom",
      amd: "react-router-dom",
    },
    "@apollo/client": {
      root: "ApolloClient",
      commonjs2: "@apollo/client",
      commonjs: "@apollo/client",
      amd: "@apollo/client",
    },
  },

  node: {
    Buffer: false,
  },

  devtool: "source-map",

  performance: {
    hints: "warning",
  },
};