NgbNavbar is not documented

[jnizet]

Bug description:

For dropdowns to look correctly inside a collapsed navbar, the NgbNavbar directive is necessary. It's automatically applied when importing NgbDropdownModule (because its selector is simply .navbar), but when using standalone components, it's far from obvious that this directive needs to be imported, since it's not even documented.

[bastienmoulia]

Demo: https://stackblitz.com/edit/angular-pzelbe?file=src%2Fapp%2Fdropdown-navbar.ts

Should we import NgbNavbar in NgbDropdown?

[maxokorokov]

Maybe simply replace it with closest()?

This is literally the only place it is used for:

ng-bootstrap/src/dropdown/dropdown.ts

Line 260 in 25f2319

this.display = ngbNavbar ? 'static' : 'dynamic';

This would work just fine:

this.display = this._elementRef.nativeElement.closest('.navbar') ? 'static' : 'dynamic';