Revert optional chaining to enhance life

To close #252

CHANGELOG.md

@@ -1,5 +1,6 @@
 ### Change Log for Node-RED Worldmap
 
+ - v4.2.1 - Revert use of optional chaining to extend life slightly. Issue #252
  - v4.2.0 - Let icons also be inline images data:image... 
  - v4.1.0 - Add optional SOG, COG, altft, altm input properties.
  - v4.0.0 - Breaking - Better context menu variable substitution and retention

README.md

@@ -13,6 +13,7 @@ Feel free to [![](https://img.shields.io/static/v1?label=Sponsor&message=%E2%9D%
 
 ### Updates
 
+- v4.2.1  - Revert use of optional chaining to extend life slightly. Issue #252
 - v4.2.0  - Let icons also be inline images data:image... 
 - v4.1.0  - Add optional SOG, COG, altft, altm input properties.
 - v4.0.0  - Breaking - Better context menu variable substitution and retention

package.json

@@ -1,6 +1,6 @@
 {
     "name": "node-red-contrib-web-worldmap",
-    "version": "4.2.0",
+    "version": "4.2.1",
     "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.js

@@ -126,7 +126,7 @@ module.exports = function(RED) {
                 if (message.action === "draw") {
                     delete message.action;
                     delete message.type;
-                    delete message.options?.pane;
+                    if (message.options) { delete message.options.pane; }
                     allPoints[message.name] = RED.util.cloneMessage(message);
                     sendToRest(message,client.id);
                 }