polygondraw | Javascript polygon editor for vector game development

I am drawing polygon on leaflet map

I'm using google-map-react (not react-google-maps), and is able to insert polygons by calling a function polygonDraw within my main Component (not using drawingManager). My function polygonDraw can be seen below.

I can immediately delete the newest polygon by adding polygon.setMap(null) inside my polygonDraw function.

But here is the problem: I can't delete previously added polygons or all polygons. My need is to be able to delete all polygons and do this without dependency on event handlers (like a click event on a polygon).

I tried different approaches, but had no successful implementation, including: I'm not able to construct a Polygon component that render new google.maps.Polygon({.etc.}) objects (based on state/props).

As I'm able to insert polygons with my polygonDraw function my current thinking for strategy is: To establish a reference for each added polygon. I tried implementing React references, including Callback refs and using React.createRef. But no success. My polygonDraw is inside the main component, but outside the render. I can't figure out if it's possible to establish and store a reference to each added polygon, so reference.setMap(null) can be called for each. And if it is possible I don't know how to establish the reference (code inside constructor?, code inside polygonDraw?, code inside render including GoogleMapReact?)

Any help/advice is appreciated :-)

I am using Leaflet and Leaflet.Draw, and I am letting the user from my code to draw polygon (NOT using the Leaflet Draw Controls).

While the user is drawing the polygon I need to change the color of its first vertex, for example: green, so that user knows that he needs to click on the first point in order to close the polygon and finish drawing.

How can I change color of first vertex while drawing polygon using Leaflet.Draw?

The following image for elaboration, meaning it's fixed with a Paint Software.

P.S. Here is my code

i have a method submitAdd() that get value from another method polygonDrawer() The issue is that I get undefined value at the submitAdd() method. it seems to be a this problem.