javascript Access parent from event listener

Question

I am trying to create a wrapper for google map api. The following function is part of an object. I keep getting "self is undefined". Typically the listener only has function(event), I tried adding self to the parameter list to get access to the parent object.

var self = this;

google.maps.event.addListener(this.geoMarker, 'dragend', function( event, self ){

      //update input 
      self.lat = event.latLng.lat(); //ERROR: self is undefined
      self.lng = event.latLng.lng();


      //udpate any fields that were set
      self.updateDisplay();  

      self.geoMarker.setTitle("Lat: " + event.latLng.lat() + '   Lng: ' + event.latLng.lat() );

});

Alnitak · Accepted Answer · 2012-03-12 13:51:08Z

3

You should remove the declaration of self from the callback's parameter list - it's over-riding the external declaration.

answered Mar 12, 2012 at 13:51

Alnitak

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1 Comment

Jim Over a year ago

perfect thanks, you'll get the check after the waiting period ends.

Nemoy · Accepted Answer · 2012-03-12 13:53:20Z

0

Remove the second parameter (self) from the callback function

answered Mar 12, 2012 at 13:53

Nemoy

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