kibana/packages/kbn-ui-shared-deps/polyfills.js

/*
 * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
 * or more contributor license agreements. Licensed under the Elastic License
 * and the Server Side Public License, v 1; you may not use this file except in
 * compliance with, at your election, the Elastic License or the Server Side
 * Public License, v 1.
 */

require('core-js/stable');
require('regenerator-runtime/runtime');
require('custom-event-polyfill');

if (typeof window.Event === 'object') {
  // IE11 doesn't support unknown event types, required by react-use
  // https://github.com/streamich/react-use/issues/73
  window.Event = CustomEvent;
}

require('whatwg-fetch');
require('abortcontroller-polyfill/dist/polyfill-patch-fetch');
require('./vendor/childnode_remove_polyfill');
require('symbol-observable');