Getting error after adding web worker with cli command in Angular 8

Angular 8 has added a better support for web workers. I had no luck to get it working. Does someone know what am i doing wrong?

Here is official guide i followed.

With this cli command i generated web worker:

ng generate webWorker my-worker

cli has generated my-worker.worker.ts file and tsconfig.worker.json file, and updated following files: angular.json, tsconfig.app.json.

After this im getting following error:

ERROR in node_modules/typescript/lib/lib.dom.d.ts(25,1): error TS6200: Definitions of the following identifiers conflict with those in another file: EventListenerOrEventListenerObject, BlobPart, HeadersInit, BodyInit, RequestInfo, DOMHighResTimeStamp, CanvasImageSource, MessageEventSource, ImageBitmapSource, TimerHandler, PerformanceEntryList, VibratePattern, AlgorithmIdentifier, HashAlgorithmIdentifier, BigInteger, NamedCurve, GLenum, GLboolean, GLbitfield, GLint, GLsizei, GLintptr, GLsizeiptr, GLuint, GLfloat, GLclampf, TexImageSource, Float32List, Int32List, BufferSource, DOMTimeStamp, FormDataEntryValue, IDBValidKey, Transferable, BinaryType, ClientTypes, EndingType, IDBCursorDirection, IDBRequestReadyState, IDBTransactionMode, KeyFormat, KeyType, KeyUsage, NotificationDirection, NotificationPermission, PushEncryptionKeyName, PushPermissionState, ReferrerPolicy, RequestCache, RequestCredentials, RequestDestination, RequestMode, RequestRedirect, ResponseType, ServiceWorkerState, ServiceWorkerUpdateViaCache, VisibilityState, WebGLPowerPreference, WorkerType, XMLHttpRequestResponseType
node_modules/typescript/lib/lib.dom.d.ts(3473,5): error TS2687: All declarations of 'privateKey' must have identical modifiers.
node_modules/typescript/lib/lib.dom.d.ts(3474,5): error TS2687: All declarations of 'publicKey' must have identical modifiers.
node_modules/typescript/lib/lib.webworker.d.ts(25,1): error TS6200: Definitions of the following identifiers conflict with those in another file: EventListenerOrEventListenerObject, BlobPart, HeadersInit, BodyInit, RequestInfo, DOMHighResTimeStamp, CanvasImageSource, MessageEventSource, ImageBitmapSource, TimerHandler, PerformanceEntryList, VibratePattern, AlgorithmIdentifier, HashAlgorithmIdentifier, BigInteger, NamedCurve, GLenum, GLboolean, GLbitfield, GLint, GLsizei, GLintptr, GLsizeiptr, GLuint, GLfloat, GLclampf, TexImageSource, Float32List, Int32List, BufferSource, DOMTimeStamp, FormDataEntryValue, IDBValidKey, Transferable, BinaryType, ClientTypes, EndingType, IDBCursorDirection, IDBRequestReadyState, IDBTransactionMode, KeyFormat, KeyType, KeyUsage, NotificationDirection, NotificationPermission, PushEncryptionKeyName, PushPermissionState, ReferrerPolicy, RequestCache, RequestCredentials, RequestDestination, RequestMode, RequestRedirect, ResponseType, ServiceWorkerState, ServiceWorkerUpdateViaCache, VisibilityState, WebGLPowerPreference, WorkerType, XMLHttpRequestResponseType
node_modules/typescript/lib/lib.webworker.d.ts(85,5): error TS2687: All declarations of 'privateKey' must have identical modifiers.
node_modules/typescript/lib/lib.webworker.d.ts(86,5): error TS2687: All declarations of 'publicKey' must have identical modifiers.
node_modules/typescript/lib/lib.webworker.d.ts(1074,5): error TS2375: Duplicate number index signature.
node_modules/typescript/lib/lib.webworker.d.ts(1360,5): error TS2375: Duplicate number index signature.
node_modules/typescript/lib/lib.webworker.d.ts(1434,13): error TS2403: Subsequent variable declarations must have the same type.  Variable 'FormData' must be of type '{ new (form?: HTMLFormElement): FormData; prototype: FormData; }', but here has type '{ new (): FormData; prototype: FormData; }'.
node_modules/typescript/lib/lib.webworker.d.ts(2170,13): error TS2403: Subsequent variable declarations must have the same type.  Variable 'Notification' must be of type '{ new (title: string, options?: NotificationOptions): Notification; prototype: Notification; readonly maxActions: number; readonly permission: NotificationPermission; requestPermission(deprecatedCallback?: NotificationPermissionCallback): Promise<...>; }', but here has type '{ new (title: string, options?: NotificationOptions): Notification; prototype: Notification; readonly maxActions: number; readonly permission: NotificationPermission; }'.
node_modules/typescript/lib/lib.webworker.d.ts(4322,13): error TS2403: Subsequent variable declarations must have the same type.  Variable 'onmessage' must be of type '(this: Window, ev: MessageEvent) => any', but here has type '(this: DedicatedWorkerGlobalScope, ev: MessageEvent) => any'.
node_modules/typescript/lib/lib.webworker.d.ts(4332,13): error TS2403: Subsequent variable declarations must have the same type.  Variable 'location' must be of type 'Location', but here has type 'WorkerLocation'.
node_modules/typescript/lib/lib.webworker.d.ts(4333,13): error TS2403: Subsequent variable declarations must have the same type.  Variable 'onerror' must be of type 'OnErrorEventHandlerNonNull', but here has type '(this: DedicatedWorkerGlobalScope, ev: ErrorEvent) => any'.
node_modules/typescript/lib/lib.webworker.d.ts(4335,13): error TS2403: Subsequent variable declarations must have the same type.  Variable 'self' must be of type 'Window', but here has type 'WorkerGlobalScope'.
node_modules/typescript/lib/lib.webworker.d.ts(4344,13): error TS2403: Subsequent variable declarations must have the same type.  Variable 'navigator' must be of type 'Navigator', but here has type 'WorkerNavigator'.

Here is my package.json file:

    {
  "name": "app-name",
  "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": "^8.0.0",
    "@angular/cdk": "^8.0.0",
    "@angular/common": "^8.0.0",
    "@angular/compiler": "^8.0.0",
    "@angular/core": "^8.0.0",
    "@angular/fire": "^5.1.3",
    "@angular/forms": "^8.0.0",
    "@angular/material": "^8.0.0",
    "@angular/platform-browser": "^8.0.0",
    "@angular/platform-browser-dynamic": "^8.0.0",
    "@angular/router": "^8.0.0",
    "bootstrap": "^4.3.1",
    "classlist.js": "^1.1.20150312",
    "core-js": "^2.5.4",
    "firebase": "^5.11.1",
    "hammerjs": "^2.0.8",
    "material-design-icons": "^3.0.1",
    "rxjs": "^6.5.2",
    "save": "^2.3.3",
    "smoothscroll-polyfill": "^0.4.3",
    "tslib": "^1.9.0",
    "web-animations-js": "github:angular/web-animations-js#release_pr208",
    "zone.js": "~0.9.1"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "~0.800.1",
    "@angular/cli": "^8.0.1",
    "@angular/compiler-cli": "^8.0.0",
    "@angular/language-service": "^8.0.0",
    "@types/jasmine": "~3.3.0",
    "@types/jasminewd2": "~2.0.6",
    "@types/node": "~12.0.3",
    "codelyzer": "^5.0.1",
    "jasmine-core": "~3.3.0",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "^4.0.1",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "~2.0.4",
    "karma-jasmine": "~2.0.1",
    "karma-jasmine-html-reporter": "^1.4.0",
    "protractor": "~5.4.1",
    "ts-node": "~7.0.1",
    "tslint": "~5.11.0",
    "typescript": "^3.4.5"
  }
}

Thanks.

Solution

I had this issue too, and noticed that in a new Angular 8 project, all tsconfig.*.json files are in the root directory, and there is only the root tslint.json file.

Here's what I did:

Copied tslint.json, tsconfig.app.json, and tsconfig.spec.json from a newly generated CLI 8 project to my project root.
Deleted tslint.json, tsconfig.app.json, and tsconfig.spec.json from the src directory.
Edited tsConfig values in angular.json to look for tsconfig files in project root, instead of in src directory.

If you made any modifications to the tsconfig files generated by the CLI, it might be easier to move them from src to the root, and edit the paths in them. I didn't change the generated files, so I just copied from a new project.

I have no idea what it is about generating a Web Worker and the addition of the tsconfig.worker.json that throws a wrench in an upgraded Angular project. Upgrading from 7 worked fine until I added a worker.