javascript - Leaflet - Possible to catch exception thrown from application -


i'm working on app user can upload kml file , renders paths on screen using leaflet, togeojson & angular-leaflet-directive.

i use togeojson.kml() transform kml text geojson object , pass leaflet rendering. works great if kml valid. however, if kml malformed, doesn't work great. togeojson continues render data object, ignoring errors occur.

var pathdata = togeojson.kml(kmldom); var latlng = [];  (var feature in pathdata.features) {     var paths = pathdata.features[feature].geometry.coordinates;     if (paths.length > 1) {         (var path in paths) {            var prospectivecoords = pathdata.features[feature].geometry.coordinates[path];            var coordinate = l.geojson.coordstolatlng(prospectivecoords);             latlng.push(coordinate);         }     } } try {     map.fitbounds(latlng); //instance of l.getmap()      angular.extend($scope, {         geojson : {             data : pathdata,             style : {                 stroke : true,                 weight : 5             }         }     });  } catch (e) {     $log.error(e.message);     $window.alert(e.message); }

in specific issue, if there error in pathdata variable, triggers exception in latlng line 7:

l.latlng = function (lat, lng, alt) {     if (isnan(lat) || isnan(lng)) {         throw new error('invalid latlng object: (' + lat + ', ' + lng +   ')');     }       ...

unfortunately, error not trapped catch block , leaflet continues render map tiles without path overlay, , notice user gets inside console. goal have more visible user notice when invalid file uploaded.

is possible intercept error @ application level?

is code inside callback function or so? geojson data through ajax call? asynchronous callback methods error trapping tricky , not in order expected. previous post interesting: catch statement not catch thrown error


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