Where is the error when creating a component in Angular 2.2?

Question

Angular

I want to create a component in Angular 2 (2.2)

import { CommonModule } from '@angular/common';
import { NgModule } from '@angular/core';
import { SpinnerComponent } from './components/spinner';

@NgModule({
  declarations: [SpinnerComponent],
  imports: [CommonModule],
  providers: [],
})
export class SpinnerModule {}

import { ChangeDetectionStrategy, Component } from '@angular/core';

@Component({
  changeDetection: ChangeDetectionStrategy.OnPush,
  selector: 'app-spinner',
  template: require('./spinner.html'),
})
export class SpinnerComponent {
 
}

It throws this error:

'app-spinner' is not a known element:
1. If 'app-spinner' is an Angular component, then verify that it is part of this module.
2. If 'app-spinner' is a Web Component then add "CUSTOM_ELEMENTS_SCHEMA" to the '@NgModule.schemas' of this component to suppress this message. ("[ERROR ->]