Use typescript

.gitignore

@@ -1,2 +1,3 @@
 *.xdc
-
+node_modules*
+dist/*

README.md

@@ -28,6 +28,17 @@ it is not bound to Leaflet.
 
 ## Building
 
+first time run:
+
+```sh
+npm install
+```
+After changes run
+
+```sh
+npm run build
+```
+
 to create `maps.xdc` file, execute:
 
 ```sh

create-xdc.sh

@@ -14,7 +14,7 @@ case "$1" in
 esac
 
 rm "$PACKAGE_NAME.xdc" 2> /dev/null
-zip -9 --recurse-paths "$PACKAGE_NAME.xdc" * --exclude LICENSE README.md webxdc.js webxdc.d.ts icon.png "*screenshot*" "*marker-*png" "*-src*" "*.map" "*.sh" "*.xdc" *.DS_Store
+zip -9 --recurse-paths "$PACKAGE_NAME.xdc" * -x "node_modules/*" @ --exclude index.ts LICENSE README.md webxdc.js webxdc.d.ts icon.png "*screenshot*" "*marker-*png" "*-src*" "*.map" "*.sh" "*.xdc" *.DS_Store package.json package-lock.json tsconfig.json types.d.ts
 
 echo "success, archive contents:"
 unzip -l "$PACKAGE_NAME.xdc"

index.html

@@ -253,7 +253,7 @@ <h3>Points of Interest</h3>
             <div class="no-items">No POIs yet</div>
         </div>
     </div>
-    <script src="index.js"></script>
+    <script src="dist/index.js" type="module"></script>
 </body>
 
 </html>