artesanias/platforms/browser/www/lib/OnsenUI/esm/polyfills/index.js

// Caution:
// Do not replace this import statement with codes.
//
// If you replace this import statement with codes,
// the codes will be executed after the following polyfills are imported
// because import statements are hoisted during compilation.
import './polyfill-switches';

// Polyfill ECMAScript standard features with global namespace pollution
import 'core-js/fn/object/set-prototype-of';
import 'core-js/fn/set';
import 'core-js/fn/map';
import 'core-js/fn/weak-map';
import 'core-js/fn/array/from';

// Polyfill Custom Elements v1 with global namespace pollution
import '@onsenui/custom-elements/src/custom-elements';

// Polyfill MutationObserver with global namespace pollution
import './MutationObserver@0.7.22/MutationObserver.js';

// Polyfill setImmediate with global namespace pollution
import './setImmediate@1.0.2+mod/setImmediate.js';