title: ag-grid not loading at all in IE11 with Angular 7
body: <p>My ag-grid works fine in all other browsers, but when I open it with IE it does not load at all. No error messages show in the console. Note that the rest of the Angular app loads just fine, just not the <code>ag-grid-angular</code> component`</p>
  
  <p>package.json</p>
  
  <pre><code>{
    "name": "my-app",
    "version": "0.0.0",
    "scripts": {
      "ng": "ng",
      "start": "ng serve",
      "build": "ng build",
      "test": "ng test",
      "lint": "ng lint",
      "e2e": "ng e2e"
    },
    "private": true,
    "dependencies": {
      "@angular/animations": "~7.2.0",
      "@angular/common": "~7.2.0",
      "@angular/compiler": "~7.2.0",
      "@angular/core": "~7.2.0",
      "@angular/forms": "~7.2.0",
      "@angular/platform-browser": "~7.2.0",
      "@angular/platform-browser-dynamic": "~7.2.0",
      "@angular/router": "~7.2.0",
      "ag-grid-angular": "^20.0.0",
      "ag-grid-community": "^20.0.0",
      "bootstrap": "^4.2.1",
      "core-js": "^2.5.4",
      "jquery": "^3.3.1",
      "rxjs": "~6.3.3",
      "tslib": "^1.9.0",
      "zone.js": "~0.8.26"
    },
    "devDependencies": {
      "@angular-devkit/build-angular": "~0.12.0",
      "@angular/cli": "~7.2.3",
      "@angular/compiler-cli": "~7.2.0",
      "@angular/language-service": "~7.2.0",
      "@fortawesome/fontawesome-free": "^5.7.0",
      "@types/jasmine": "~2.8.8",
      "@types/jasminewd2": "~2.0.3",
      "@types/node": "~8.9.4",
      "codelyzer": "~4.5.0",
      "jasmine-core": "~2.99.1",
      "jasmine-spec-reporter": "~4.2.1",
      "karma": "~3.1.1",
      "karma-chrome-launcher": "~2.2.0",
      "karma-coverage-istanbul-reporter": "~2.0.1",
      "karma-jasmine": "~1.1.2",
      "karma-jasmine-html-reporter": "^0.2.2",
      "protractor": "~5.4.0",
      "ts-node": "~7.0.0",
      "tslint": "~5.11.0",
      "typescript": "~3.2.2"
    }
  }
  </code></pre>
  
  <p>polyfill.ts</p>
  
  <pre><code>/***************************************************************************************************
   * BROWSER POLYFILLS
   */
  
  /** IE9, IE10, IE11, and Chrome &lt;55 requires all of the following polyfills.
   *  This also includes Android Emulators with older versions of Chrome and Google Search/Googlebot
   */
  
  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';
  
  /***************************************************************************************************
   * Zone JS is required by default for Angular itself.
   */
  import 'zone.js/dist/zone';  // Included with Angular CLI.
  </code></pre>
  
  <p>my component template (for brevity, please assume that I am passing a valid <code>gridOptions</code> object filled with data)</p>
  
  <pre><code>&lt;div class="container"&gt;
    &lt;ag-grid-angular class="ag-theme-material" [gridOptions]="gridOptions"&gt;&lt;/ag-grid-angular&gt;
  &lt;/div&gt;
  </code></pre>