jquery - Execute event on first click only -

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i’m trying execute below click(function) on first click, executes whenever click on map. possible use one-click below code ? in advance 

var placedmarkers = 0; var availablemarkerstoplace = 1; settimeout( function(){     if(placedmarkers >= availablemarkerstoplace)          return;     placedmarkers++;     var map = appery("google_map").gmap;     google.maps.event.addlistener(map, 'click', function(event) {         localstorage.setitem('selectedlat', event.latlng.lat()); localstorage.setitem('selectedlng', event.latlng.lng());          placemarker(event.latlng,map);           alert(event.latlng);     });  }, 1000);

just create flag-value, decide, run function or skip:

var placedmarkers = 0; var availablemarkerstoplace = 1; var clicked = false;  settimeout( function(){     if(placedmarkers >= availablemarkerstoplace)         return;     placedmarkers++;     var map = appery("google_map").gmap;     google.maps.event.addlistener(map, 'click', function(event) {          if(!clicked) {             clicked = true;             localstorage.setitem('selectedlat', event.latlng.lat());             localstorage.setitem('selectedlng', event.latlng.lng());              placemarker(event.latlng,map);               alert(event.latlng);                     }      });  }, 1000);

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