@robwormald , I would like to fix this one and add integration test for it. And I just created a new project with angular/cli and

• remove zone.js from polyfill.ts.
• bootstrap with ngZone: 'noop'.

everything work file, could you provide a reproduce repo? thank you.

@JiaLiPassion see https://stackblitz.com/edit/angular-branw3?file=app%2Fapp.component.ts - I think this will only surface on v6+?

@robwormald , yes, you are right, thank you for the reproduce link.

@robwormald , I have created a PR #23452 to fix this one, please review, thank you.

@JiaLiPassion Is there any workaround for this error while we wait for your PR to merged?

@oliverdavidt , I believe you can define this line in polifills.ts to avoid the error for now.

(window as any)['Zone'] = {
  current: {
    get: function() {}
  }
};

@JiaLiPassion That worked. Thank you.

what should we do in angular ssr in server.ts?

Another workaround could be:

providers: [{ provide: Testability, useValue: null }]

(window as any)['Zone'] = { current: { get: function() {} } };

does it matter where this goes on the polyfill.ts file? Is it best on top or bottom of the file?

@maylortaylor, you can put this code anywhere in polyfill.ts.

Fixed by @kara in ee12e725.

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