Technical how to Enable Map Mouse Zoom In and Zoom Out
For Google Maps
To enable map mouse zoom in and zoom out edit the following files
In mapbase.js change false to true for scrollwheel and change ‘cooperative’ with ‘greedy‘ for gestureHandling. Do this change at line 245 and 981.
For map from agency or developer page make the same change also in function wpestate_agency_map_function from mapfunctions.js file – In mapfunctions.js at line 48 and 216
Change false to true for scrollwheel and change ‘cooperative’ with ‘greedy’ for gestureHandling
For the map from front end submit property page make the same change in google_map_submit.js file
Change false to true for scrollwheel and add gestureHandling: ‘greedy’
For OpenStreet Maps
To enable zoom on mouse scroll for open street maps just delete/comment this line of code
map.scrollWheelZoom.disable();
and from js\openstreet\google_map_code_listing_openstreet.js line 24