How to get external coordinates of a polygon?

Question

JavaScript

Good afternoon!
I can't figure it out, please help. In general, the essence: you need to draw a polygon and check the occurrence of coordinates in the area. I check the entry (in PHP), everything is fine, but when I draw an external polygon (through the constructor), it literally does not exist, i.e. I get coordinates only from the main polygon ...
Returning coordinates:

polygon.geometry.getCoordinates(); // нет координат внешних полигонов