Is it possible to catch exceptions thrown in a JavaScript async callback?

Question

Is there a way to catch exceptions in JavaScript callbacks? Is it even possible?

Uncaught Error: Invalid value for property <address> 

Here is the jsfiddle: http://jsfiddle.net/kjy112/yQhhy/

try {     // this will cause an exception in google.maps.Geocoder().geocode()      // since it expects a string.     var zipcode = 30045;      var map = new google.maps.Map(document.getElementById('map_canvas'), {         zoom: 5,         center: new google.maps.LatLng(35.137879, -82.836914),         mapTypeId: google.maps.MapTypeId.ROADMAP     });     // exception in callback:     var geo = new google.maps.Geocoder().geocode({ 'address': zipcode },         function(geoResult, geoStatus) {           if (geoStatus != google.maps.GeocoderStatus.OK) console.log(geoStatus);        }     ); } catch (e) {     if(e instanceof TypeError)        alert('TypeError');     else        alert(e); }​ 

Answer 1

The reason it won't catch anything in your example is because once the geocode() callback is called, the try/catch block is over. Therefore the geocode() callback is executed outside the scope of the try block and thus not catchable by it.

As far as I know, it is not possible to catch exceptions thrown in JavaScript callbacks (at least, not in any straightforward manner).