Why is change detection called twice?

Question

I have a simple test-component with no logic. I render this component. Why is the DoCheck hook called twice?

So far I understand, DoCheck is called for every change detection. But there is no change. I just render the component and DoCheck is already called two times. Also ngAfterContentChecked and ngAfterViewChecked.

Answer 1

Angular Change Detection - How Does It Really Work?

... Angular always running change detection twice, the second time for detecting this type of cases. In production mode change detection is only run once