resolver.js

// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.

module.exports = ( path, options ) => {
	// Call the defaultResolver, so we leverage its cache, error handling, etc.
	return options.defaultResolver( path, {
		...options,
		// Use packageFilter to process parsed `package.json` before the resolution (see https://www.npmjs.com/package/resolve#resolveid-opts-cb)
		packageFilter: ( pkg ) => {
			// This is a workaround for https://github.com/uuidjs/uuid/pull/616
			//
			// jest-environment-jsdom 28+ tries to use browser exports instead of default exports,
			// but uuid v8 only offers an ESM browser export and not a CommonJS one. Jest does not yet
			// support ESM modules natively, so this causes a Jest error related to trying to parse
			// "export" syntax.
			//
			// This workaround prevents Jest from considering uuid's module-based exports at all;
			// it falls back to uuid's CommonJS+node "main" property.
			//
			// Once we're able to migrate our Jest config to ESM and a browser crypto
			// implementation is available for the browser+ESM version of uuid to use (eg, via
			// https://github.com/jsdom/jsdom/pull/3352 or a similar polyfill), this can go away.
			if (
				pkg.name === 'uuid' ||
				pkg.name === 'react-colorful' ||
				pkg.name === '@eslint/eslintrc' ||
				pkg.name === 'expect' ||
				pkg.name === 'nanoid'
			) {
				delete pkg.exports;
				delete pkg.module;
			}
			return pkg;
		},
	} );
};