webpack.polyfills.config.js

const path = require('path');
const CopyWebpackPlugin = require('copy-webpack-plugin');

module.exports = () => {
  const config = {
    mode: 'production',
    entry: {
      'resize-observer-polyfill':
        './libs/designsystem/src/lib/polyfills/resize-observer-polyfill.js',
      'resize-observer-polyfill-loader':
        './libs/designsystem/src/lib/polyfills/resize-observer-polyfill-loader',
      'intersection-observer-polyfill':
        './libs/designsystem/src/lib/polyfills/intersection-observer-polyfill.js',
      'intersection-observer-polyfill-loader':
        './libs/designsystem/src/lib/polyfills/intersection-observer-polyfill-loader',
    },
    output: {
      filename: '[name].min.js',
      path: path.resolve(__dirname, 'libs/designsystem/src/lib/polyfills/'),
    },
    plugins: [
      new CopyWebpackPlugin({
        patterns: [
          { from: './libs/designsystem/src/lib/polyfills/resize-observer-polyfill-loader.js' },
          {
            from: './libs/designsystem/src/lib/polyfills/intersection-observer-polyfill-loader.js',
          },
        ],
      }),
    ],
  };

  return config;
};