I have a leaflet map in which map.locate() can be called in two ways: 1. Easybutton location button, 2. A regular call every minute using setTimeout.

Each has their own locationfound listener, or at least I would like them to have - this is the problem: clicking the easybutton triggers both the control._map.on('locationfound'..) easybutton listener, AND the map.on('locationfound'..) listener inside getLocation().

The regular call to getLocation() only triggers the map.on('locationfound'..) listener. Is this something to do with scope? How do I get it so the easybutton only triggers its intended listener and the setTimeout call to map.locate() only triggers the listener in getLocation()?

  L.easyButton({
    position: easy_position,
    states:[
      {
        stateName: 'unloaded',
        icon: 'fa-location-arrow',
        title: 'load image',
        onClick: function(control){
          control.state("loading");
          control._map.on('locationfound', function(e){
            alert('location found - easybutton');
            this.setView(e.latlng,18); // go to current location
            control.state('loaded');
            setTimeout(function(){
              control.state('unloaded');
            }, 3000);
          });
          control._map.on('locationerror', function(){
            control.state('error');
            setTimeout(function(){
              control.state('unloaded');
            }, 3000);
          });
          control._map.locate();
          setTimeout(function(){
            control.state('unloaded');
          }, 10000);  // give it ten seconds to find the location
        }
      }, {
        stateName: 'loading',
        icon: 'fa-spinner fa-spin'
      }, {
        stateName: 'loaded',
        icon: 'fa-thumbs-up'
      }, {
        stateName: 'error',
        icon: 'fa-frown-o',
        title: 'location not found'
      }
    ]
  }).addTo(map);

  function updateLocation() {
    getLocation(false);
    setTimeout(updateLocation, 60000);
  }

  getLocation = function(goToLocation) {
    map.on('locationfound', function(e) {
      alert('location found - getLocation()');
      var lat = e.latitude;
      var lng = e.longitude;
      if(goToLocation) {
        pan_to(lat,lng,0.5);
      }
    });
    map.on('locationerror', function(e) {
      console.log(e);
    });
    map.locate({
      setView: false,
      maxZoom: 16
    });
  }