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Мое приложение работает абсолютно нормально в Firefox, Chrome, Edge, Safari, но в IE 11 весь пользовательский интерфейс пуст, и на консоли браузера есть ошибки: я провел много исследований. Кто-то предложил мне добавить недостающие полифиллы. Я сделал то же самое: (извините, что вставил сюда весь файл) polyfills.ts

 /**
 * This file includes polyfills needed by Angular and is loaded before the app.
 * You can add your own extra polyfills to this file.
 *
 * This file is divided into 2 sections:
 *   1. Browser polyfills. These are applied before loading ZoneJS and are sorted by browsers.
 *   2. Application imports. Files imported after ZoneJS that should be loaded before your main
 *      file.
 *
 * The current setup is for so-called "evergreen" browsers; the last versions of browsers that
 * automatically update themselves. This includes Safari >= 10, Chrome >= 55 (including Opera),
 * Edge >= 13 on the desktop, and iOS 10 and Chrome on mobile.
 *
 * Learn more in https://angular.io/guide/browser-support
 */

/***************************************************************************************************
 * BROWSER POLYFILLS
 */

import 'core-js/es6/symbol';
import 'core-js/es6/object';
import 'core-js/es6/function';
import 'core-js/es6/parse-int';
import 'core-js/es6/parse-float';
import 'core-js/es6/number';
import 'core-js/es6/math';
import 'core-js/es6/string';
import 'core-js/es6/date';
import 'core-js/es6/array';
import 'core-js/es6/regexp';
import 'core-js/es6/map';
import 'core-js/es6/weak-map';
import 'core-js/es6/set';

import 'classlist.js';

/** IE10 and IE11 requires the following for NgClass support on SVG elements */
// import 'classlist.js';  // Run `npm install --save classlist.js`.

/**
 * Web Animations `@angular/platform-browser/animations`
 * Only required if AnimationBuilder is used within the application and using IE/Edge or Safari.
 * Standard animation support in Angular DOES NOT require any polyfills (as of Angular 6.0).
 */
// import 'web-animations-js';  // Run `npm install --save web-animations-js`.

/**
 * By default, zone.js will patch all possible macroTask and DomEvents
 * user can disable parts of macroTask/DomEvents patch by setting following flags
 * because those flags need to be set before `zone.js` being loaded, and webpack
 * will put import in the top of bundle, so user need to create a separate file
 * in this directory (for example: zone-flags.ts), and put the following flags
 * into that file, and then add the following code before importing zone.js.
 * import './zone-flags.ts';
 *
 * The flags allowed in zone-flags.ts are listed here.
 *
 * The following flags will work for all browsers.
 *
 * (window as any).__Zone_disable_requestAnimationFrame = true; // disable patch requestAnimationFrame
 * (window as any).__Zone_disable_on_property = true; // disable patch onProperty such as onclick
 * (window as any).__zone_symbol__UNPATCHED_EVENTS = ['scroll', 'mousemove']; // disable patch specified eventNames
 *
 *  in IE/Edge developer tools, the addEventListener will also be wrapped by zone.js
 *  with the following flag, it will bypass `zone.js` patch for IE/Edge
 *
 *  (window as any).__Zone_enable_cross_context_check = true;
 *
 */

/***************************************************************************************************
 * Zone JS is required by default for Angular itself.
 */
import 'zone.js/dist/zone'; // Included with Angular CLI.
/***************************************************************************************************
 * APPLICATION IMPORTS
 */
import 'core-js/es7/reflect';
import 'core-js/es7/map';
import 'core-js/es7/set';
import 'core-js/es7/array';
 

список обозревателей

 # This file is used by the build system to adjust CSS and JS output to support the specified browsers below.
# For additional information regarding the format and rule options, please see:
# https://github.com/browserslist/browserslist#queries

# You can see what browsers were selected by your queries by running:
#   npx browserslist

> 0.5%
last 2 versions
Firefox ESR
not dead
IE 9-11 # For IE 9-11 support, remove 'not'.
 

tsconfig.json

 {
    "compileOnSave": false,
    "compilerOptions": {
        "baseUrl": "./",
        "outDir": "./dist/out-tsc",
        "sourceMap": true,
        "declaration": false,
        "module": "esnext",
        "moduleResolution": "node",
        "emitDecoratorMetadata": true,
        "experimentalDecorators": true,
        "importHelpers": true,
        "target": "es5",
        "typeRoots": ["node_modules/@types"],
        "lib": ["es2017", "dom"],
        "allowSyntheticDefaultImports": true,
        "resolveJsonModule": true,
        "esModuleInterop": true
    }
}
 

Но все равно экран пуст с теми же ошибками на консоли. Пожалуйста, помогите мне выбраться. Я заблокирован с последних 8 дней.

Вы можете попробовать добавить этот флаг перед загрузкой zone.js:

 (window as any).__Zone_enable_cross_context_check = true;
import 'zone.js/dist/zone';
 

Я обнаружил, что он уже существует в polyfills.ts опубликованном вами сообщении, вам нужно его раскомментировать.

И это, похоже, известная проблема, вы можете обратиться по этой ссылке: [ОШИБКА] IE11 -> Не удается выполнить код из освобожденного сценария>.