I’ve created a custom directive called ngForFlTrackByIndex to be used inside ngFor. Everything is fine in vscode but in WebStorm complains Expression expected.

Also the directive code:

@Directive({
  selector: '[ngForFlTrackByIndex]',
  standalone: true,
})
export class TrackByIndexDirective<T> {
  constructor(@Host() private readonly _ngFor: NgForOf<T>) {
    this._ngFor.ngForTrackBy = (index: number): number => index;
  }
}

Any idea?