feat(popover): add functionality of displaying/attaching popover without using the directive

[pgeyman]

Is it possible to display/attach a popover to an element without using the directive?

I have occasions where I end up having to use non-angular 2 components (like fullcalendar) and I have an element I want to have a popup from, but am not able to add the angular 2 directives as I don't have an angular template.
I would rather not have to add and use some jquery popover component.

[valorkin]

@pgeyman how you will pass a selector?
we are finishing to work on modals service, and it is very similar to what popover service could look like

[pgeyman]

@valorkin Assuming it is what you mean by a selector, I would be passing a DOM element or elementRef.

[sapariyaravi]

have anyone found the solution for how to pass DOM element or ElementRef to dynamically created popover without using directive.
Because I am using the d3 chart and all the elements of d3 created dynamically.