Ng serve throwing @angular/core/core has no exported member 'eeFactoryDef'

Question

Im getting like 50 errors that all say that angular/core/core has no exported member \'eeFactoryDef\'.

They come from different node_modules, for example angular/cdk

Answer 1

Main project had Angular 8 and I got this issue when some packages with Angular 9 were installed. Use this for upgrade steps: https://update.angular.io - specifically upgrade to latest version of 8 ng update @angular/core@8 @angular/cli@8 then to 9 ng update @angular/core@9 @angular/cli@9.