Leaflet.MousePosition is a simple mouse position control that you can drop into your leaflet map. It displays geographic coordinates of the mouse pointer, as it is moved about the map.
Insert the following line:
...
L.control.mousePosition().addTo(map);
...
These are the available options:
position: The standard Leaflet.Control position parameter. Defaults to 'bottomleft'
separator: To separate longitude\latitude values. Defaults to ' : '
emptystring: Initial text to display. Defaults to 'Unavailable'
numDigits: Number of digits. Defaults to 5
lngFirst: Weather to put the longitude first or not. Defaults to false
lngFormatter: Custom function to format the longitude value. Defaults to undefined
latFormatter: Custom function to format the latitude value. Defaults to undefined
prefix: A string to be prepended to the coordinates. Defaults to the empty string ‘’.