CODE EXAMPLE FOR JAVASCRIPT

close div when click outside angular 7

@Component({
  host: {
    '(document:click)': 'onClick($event)',
  },
})
class SomeComponent() {
  constructor(private _eref: ElementRef) { }

  onClick(event) {
   if (!this._eref.nativeElement.contains(event.target)) // or some similar check
     doSomething();
  }
}