Reactive Forms - App Module

app.module.ts

@NgModule({
  declarations: [...],
  imports: [
    BrowserModule,
    AppRoutingModule,
    /*
    ** Important to Include FormsModule & ReactiveFormsModule
    */
    FormsModule,
    ReactiveFormsModule,
    BrowserAnimationsModule,
    MaterialModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }