webpack.base.js

const path = require('path');
const { CleanWebpackPlugin } = require('clean-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');


module.exports = {
  entry: './src/index.ts',
  module: {
    rules: [
      {
        test: /\.tsx?$/,
        use: 'ts-loader',
        exclude: /node_modules/,
      },
      {
        test: /\.jsx?$/,
        include: [
          path.resolve(__dirname, "node_modules/casbin/lib/esm"),
        ],
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-env'],
            plugins: ['@babel/plugin-proposal-optional-chaining']
          },
        },
      }
    ],
  },
  resolve: {
    extensions: [ '.tsx', '.ts', '.js' ],
  },
  node: {
    fs: "empty"
  },

  output: {
    library: 'casbin',
    libraryTarget: 'umd',
    filename: 'casbin.js',
    path: path.resolve(__dirname, 'dist'),
  },
  plugins: [
    new CleanWebpackPlugin()
  ]
};