Get Angular Type<> from component instance in Angular 5

Question

First of all, I wanted to make clear that what I want is the Angular Type instance of a component, not the TypeScript definition of that component.

The context is the following: I'm inside a service and I receive in input the instance of a component ( HomeComponent with all the component properties specified). I can also access the ViewContainerRef and the TemplateRef . However, I didn't find anything that I can pass to resolveComponentFactory to obtain a new instance of the object.

I tried:

component = *component instance*
componentFactoryResolver.resolveComponentFactory(component)

But it throws the following error:

No component factory found for [object Object]. Did you add it to @NgModule.entryComponents?

Obviously the component is correctly imported (I've an instance of it.).

I tried different combinations with the same result, but I still can't get the Type instance that Angular wants.

I don't know a priori the list of possible components, so I can't use a map or import them in the service. How can I obtained the wanted instance?

I'm currently using Angular5, so I still need the ComponentFactoryResolver.

Answer 1

Through experimentation, I found out that the Angular Type instance is actually a string representing the constructor of the component.

For this reason, it was as easy as:

componentFactoryResolver.resolveComponentFactory(component.constructor)