sync

node_modules/@react-leaflet/core/lib/control.js

@@ -0,0 +1,30 @@
+import { useEffect, useRef } from 'react';
+import { useLeafletContext } from './context.js';
+export function createControlHook(useElement) {
+    return function useLeafletControl(props) {
+        const context = useLeafletContext();
+        const elementRef = useElement(props, context);
+        const { instance  } = elementRef.current;
+        const positionRef = useRef(props.position);
+        const { position  } = props;
+        useEffect(function addControl() {
+            instance.addTo(context.map);
+            return function removeControl() {
+                instance.remove();
+            };
+        }, [
+            context.map,
+            instance
+        ]);
+        useEffect(function updateControl() {
+            if (position != null && position !== positionRef.current) {
+                instance.setPosition(position);
+                positionRef.current = position;
+            }
+        }, [
+            instance,
+            position
+        ]);
+        return elementRef;
+    };
+}