When using Angular, the Zone can be accessed through VSCode intelligence, but it appears as undefined when running in

Upon attempting to utilize Zone within the ngOnInit function in my Angular application, I placed a breakpoint on line 11. However, when inspecting the function Zone(parent, zoneSpec){....}, it returns undefined upon launching in Chrome browser. Here is the code I am working with: (https://stackblitz.com/edit/angular-c98byw)

export class AppComponent implements OnInit{
    ngOnInit(): void {
        // RootZone is ambient and identical to no Zone.
        console.dir(Zone)
        let rootZone = Zone.current;
        // We create a new zone by forking an existing one.
        let zoneA = rootZone.fork({name: 'zoneA'});

        // Each zone has a name for debugging
        console.log(rootZone.name);
        
  }
  title = 'app';
  @ViewChild('vc', {read: ViewContainerRef}) vc: ViewContainerRef;

constructor(private zone:NgZone,
  private _compiler: Compiler,
            private _injector: Injector,
            private _m: NgModuleRef<any>) {
}

During debugging in VSCode: I can access via the VSCode intelligence. However, an error is thrown from Chrome:

AppComponent_Host.ngfactory.js? [sm]:1 ERROR TypeError: Cannot read property 'current' of undefined
    at AppComponent.push../src/app/app.component.ts.AppComponent.ngOnInit (app.component.ts:12)
    at checkAndUpdateDirectiveInline (core.js:9035)
...
(core.js:3077 Angular is running in development mode. Call enableProdMode() to switch to production mode.

Answer №1

To identify where it is located, you must indicate that it is within the window object.

By utilizing console.dir(window["Zone"]), you will observe that the function gets displayed in the console as intended.

Alternatively, you have the option to include let Zone = window["Zone"] at the start of ngOnInit.

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