Cannot add property “X”, object is not extensible angular 9

Question

I have encountered this issue on many places after some days of updating from Angular 8 to Angular 9. Earlier it was working fine.

Can anyone help me what\'s the pro

Answer 1

If you are getting this error after using NgRx in Angular. Try implementing below code it will help on a global level. Otherwise you can utilize deep cloning of Object or Array to eradicate the problem.

@NgModule({
  imports: [
  StoreModule.forRoot(reducers, {
    runtimeChecks: {
      strictStateImmutability: false,
      strictActionImmutability: false,
    },
  }),
 ],
})
export class AppModule {}