make map.ts compliant to latest leaflet version

Author: maurerle

lib/map.ts

@@ -138,28 +138,34 @@ export const Map = function (linkScale: (t: any) => any, sidebar: ReturnType<typ
     labelLayer.redraw();
   });
 
-  map.on("baselayerchange", function (e) {
-    map.options.maxZoom = e.layer.options.maxZoom;
-    clientLayer.options.maxZoom = map.options.maxZoom;
-    labelLayer.options.maxZoom = map.options.maxZoom;
-    if (map.getZoom() > map.options.maxZoom) {
-      map.setZoom(map.options.maxZoom);
+  map.on("baselayerchange", function (e: any & { name: string }) {
+    const selectedLayer = baseLayers[e.name];
+    if (selectedLayer && selectedLayer.options.maxZoom !== undefined) {
+      const maxZoom = selectedLayer.options.maxZoom;
+      map.options.maxZoom = maxZoom;
+      clientLayer.options.maxZoom = maxZoom;
+      labelLayer.options.maxZoom = maxZoom;
+
+      if (map.getZoom() > maxZoom) {
+        map.setZoom(maxZoom);
+      }
     }
 
     let html_tag: Element = document.querySelector("html");
     let class_list = html_tag.classList;
+    const mode = selectedLayer?.options?.mode;
     class_list.forEach(function (item) {
       if (item.startsWith("theme_")) {
         class_list.remove(item);
       }
     });
     if (
       html_tag &&
-      e.layer.options.mode &&
-      e.layer.options.mode !== "" &&
-      !html_tag.classList.contains(e.layer.options.mode)
+      mode &&
+      mode !== "" &&
+      !html_tag.classList.contains(mode)
     ) {
-      class_list.add("theme_" + e.layer.options.mode);
+      class_list.add("theme_" + mode);
       labelLayer.updateLayer();
     }
   });

package-lock.json

@@ -30,7 +30,7 @@
     "@types/d3-selection": "^3.0.11",
     "@types/d3-timer": "^3.0.2",
     "@types/d3-zoom": "^3.0.8",
-    "@types/leaflet": "^1.7.1",
+    "@types/leaflet": "^1.9.4",
     "@types/node-polyglot": "^2.4.4",
     "@types/rbush": "^4.0.0",
     "d3-collection": "^1.0.7",
@@ -41,7 +41,7 @@
     "d3-selection": "^3.0.0",
     "d3-timer": "^3.0.1",
     "d3-zoom": "^3.0.0",
-    "leaflet": "^1.7.1",
+    "leaflet": "^1.9.4",
     "moment": "^2.30.1",
     "navigo": "^7.1.3",
     "node-polyglot": "2.5.0",