fix hang on layer change

CHANGELOG.md

@@ -1,5 +1,6 @@
 ### Change Log for Node-RED Worldmap
 
+ - v2.37.3 - Fix hang on layer change
  - v2.37.2 - If custom layer is only layer then show it automatically. Issue #230
  - v2.37.1 - Warn (and drop) messages that are missing a payload. Issue #229
  - v2.37.0 - Allow fly instead of fit option when using command to move view window. (PR #225)

README.md

@@ -11,6 +11,7 @@ map web page for plotting "things" on.
 
 ### Updates
 
+- v2.37.3 - Fix hang on layer change
 - v2.37.2 - If custom layer is only layer then show it automatically. Issue #230
 - v2.37.1 - Warn (and drop) messages that are missing a payload. Issue #229
 - v2.37.0 - Allow fly instead of fit option when using command to move view window. (PR #225)

package.json

@@ -1,6 +1,6 @@
 {
     "name": "node-red-contrib-web-worldmap",
-    "version": "2.37.2",
+    "version": "2.37.3",
     "description": "A Node-RED node to provide a web page of a world map for plotting things on.",
     "dependencies": {
         "@turf/bezier-spline": "~6.5.0",

worldmap/worldmap.js

@@ -389,7 +389,7 @@ var edgeAware = function() {
 
 	var viewBounds = L.latLngBounds(map.options.crs.pointToLatLng(L.point(pSW.x - (pCenter.x - pSW.x ), pSW.y - (pCenter.y - pSW.y )), map.getZoom()) , map.options.crs.pointToLatLng(L.point(pNE.x + (pNE.x - pCenter.x) , pNE.y + (pNE.y - pCenter.y) ), map.getZoom()) );
 	for (var id in markers) {
-        if (allData[id].hasOwnProperty("SIDC")) {
+        if (allData[id] && allData[id].hasOwnProperty("SIDC")) {
             markerLatLng = markers[id].getLatLng();
             if ( viewBounds.contains(markerLatLng) && !mapBounds.contains(markerLatLng) ) {
                 var k = (markerLatLng.lat - mapBoundsCenter.lat) / (markerLatLng.lng - mapBoundsCenter.lng);