ngModel isn't a known property code example

Example 1: Can't bind to 'ngModel' since it isn't a known property of 'input'.

import { FormsModule } from '@angular/forms';

[...]

@NgModule({
  imports: [
    [...]
    FormsModule
  ],
  [...]
})

Example 2: can't bind to 'ngmodeloptions' since it isn't a known property of 'input'

import { FormsModule } from '@angular/forms';

@NgModule({ imports: [ FormsModule ], })