Angular ivy patching life-cycle hook doesn't work

Question

I have a function that takes a component instance and overrides the ngOnDestroy hook:

export function patch(instance) {
 instance['ngOnDestroy'] = function() {
   console.log('ngOnDestroy');
  }
}

And in the component:

  ngOnInit() {
    patch(this);
  }

But I don't see the log when the component is destroyed. Why it's not working?

Answer 1

The ViewEnging runs methods directly from the component instance. On the opposite Ivy collect all life cycle methods in the view of the component at the beginning of the component creation so future changes will not have affect at all.