Hi every one i am trying to select an option in a page written ing angularjs via javascript

i need append div element contains p and h3 after compenent tag in Angular

When put it inside window.onLoad()
Works only when reload and refresh
That approach isn’t used in single page app
How can do that?

I have angular reusable select component that accepts formControlName as @Input. and renders select component and options are passed as child component and rendered inside <ng-content>.