beginning of map layer control

website/src/lib/components/custom-control/CustomControl.ts

@@ -0,0 +1,20 @@
+import { type Map, type IControl } from 'mapbox-gl';
+
+export default class CustomControl implements IControl {
+    _map: Map | undefined;
+    _container: HTMLElement;
+
+    constructor(container: HTMLElement) {
+        this._container = container;
+    }
+
+    onAdd(map: Map): HTMLElement {
+        this._map = map;
+        return this._container;
+    }
+
+    onRemove() {
+        this._container?.parentNode?.removeChild(this._container);
+        this._map = undefined;
+    }
+}