When updating to angular 9 I get the following Storybook error. Error message from storybook The error says that I need to add a polyfill for internationalization, but I can't figure out how to. I need to configure webpack and add the polyfill there, but I am not able to get it to work. Does anyone know how to fix this? Cheers EDIT: To clarify I did I ran the ng add @angular/localize in the angular project. Nevertheless, Storybook is not picking it up. This is my polyfills.ts file. /*************************************************************************************************** * Load `$localize` onto the global scope - used if i18n tags appear in Angular templates. */ import '@angular/localize/init'; /** * 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/docs/ts/latest/guide/browser-support.html */ /*************************************************************************************************** * BROWSER POLYFILLS */ /** IE9, IE10 and IE11 requires all of the following polyfills. **/ import 'core-js/es/symbol'; import 'core-js/es/object'; import 'core-js/es/function'; import 'core-js/es/parse-int'; import 'core-js/es/parse-float'; import 'core-js/es/number'; import 'core-js/es/math'; import 'core-js/es/string'; import 'core-js/es/date'; import 'core-js/es/array'; import 'core-js/es/regexp'; import 'core-js/es/map'; import 'core-js/es/set'; /** IE10 and IE11 requires the following for NgClass support on SVG elements */ // import 'classlist.js'; // Run `npm install --save classlist.js`. /** Evergreen browsers require these. **/ // Used for reflect-metadata in JIT. If you use AOT (and only Angular decorators), you can remove. import 'core-js/es/reflect'; /** * Required to support Web Animations `@angular/platform-browser/animations`. * Needed for: All but Chrome, Firefox and Opera. http://caniuse.com/#feat=web-animation **/ // import 'web-animations-js'; // Run `npm install --save web-animations-js`. /*************************************************************************************************** * Zone JS is required by default for Angular itself. */ import 'zone.js/dist/zone'; // Included with Angular CLI. /*************************************************************************************************** * APPLICATION IMPORTS */ /* https://github.com/aws/aws-amplify/issues/678 fix: */ (window as any).global = window; /* https://github.com/aws/aws-amplify/issues/678 fix end */ EDIT2: tsconfig.json { "extends": "../src/tsconfig.app.json", "compilerOptions": { "types": [ "node" ] }, "exclude": [ "../src/test.ts", "../src/**/*.spec.ts", "../projects/**/*.spec.ts", "../src/assets/webgl_2019_1/**/*" ], "include": [ "../src/**/*", "../projects/**/*" ], "files": [ "./typings.d.ts" ] } Continue reading...