What is the easiest way to add a component that is not in the DOM on an event on another component in Angular2?

Question

Angular

Good afternoon! Can you please tell me how easy it is to add a component that is not in the DOM on an event on another component in Angular2 (something like popup)?
Let's say there is a component that is described and declared in app.module, but is not displayed anywhere in the warm. I want this component to appear in the root app component (well, or in another component) with a certain event on another (existing in the DOM) component. This can be somehow implemented without using the ngIf structural directive.
Thank you!

Answer 1

either use a modal or toast( https://github.com/PointInside/ng2-toastr). I use this and that

Answer 2

See how ngIf
is implemented. Based on this, you can make your own bicycle.
But in general, I think you should use a router for such operations.