expressionchangedafterithasbeencheckederror ngonchanges viewchild code example
Example: ExpressionChangedAfterItHasBeenCheckedError:
import { ChangeDetectorRef, AfterContentChecked} from '@angular/core';
constructor(
private cdref: ChangeDetectorRef) { }
ngAfterContentChecked() {
this.cdref.detectChanges();
}