How to add marker to cursor in leaflet on button click?

Question

JavaScript

Question on leaflet js
I press the button to add a marker.
Now when you click on a point on the map, a marker is added - it works.
But I want that when hovering over the map (when the mouseover event fires)
, make sure that the cursor immediately has a marker at that moment, which only needs to be placed on the map.
Here's what it looks like:

Here's what I want to get:
-I'm doing it on drug and drop (don't pay attention to building the route)