Best way to send event from AngularJS parent component to Angular 7 child component? (ngUpgrade)

I have an AngularJS (1.7) app which is being migrated to Angular 7, using ngUpgrade. So the AngularJS and Angular frameworks are running at the same time, new components are written in Angular, and sometimes these modern Angular components are used inside of legacy AngularJS components.In my case, the parent component needs to communicate with the child component in certain circumstances. The ngUpgrade docs clearly show how to pass data and propagate events from the child Angular component to the parent AngularJS component:<legacy-angularjs...Read more