web/gui2/src/main/webapp/rollup.config.js

const {nodeResolve} = require('@rollup/plugin-node-resolve');
const commonjs = require('@rollup/plugin-commonjs');

module.exports = {
  plugins: [
    nodeResolve({
      mainFields: ['browser', 'es2015', 'module', 'jsnext:main', 'main'],
    }),
    commonjs(),
  ],
};