improved drag listener

src/js/pannellum.js

@@ -1713,21 +1713,21 @@ function createHotSpot(hs) {
         span.style.cursor = 'pointer';
     }
     if(hs.draggable){
-	 var dragListener = function(e){
-		var coords = mouseEventToCoords(e);
-		hs.pitch = coords[0];
-		hs.yaw = coords[1];
-		renderHotSpot(hs);
-	}
-	div.addEventListener('mousedown', (e) => {
-        div.addEventListener('mouseleave', (e) => {
-            div.removeEventListener('mousemove', dragListener);
+        var dragListener = function (e) {
+            var coords = mouseEventToCoords(e);
+            hs.pitch = coords[0];
+            hs.yaw = coords[1];
+            renderHotSpot(hs);
+        }
+        div.addEventListener('mousedown', (e) => {
+            div.addEventListener('mouseleave', (e) => {
+                div.removeEventListener('mousemove', dragListener);
+            });
+            div.addEventListener('mouseup', (e) => {
+                div.removeEventListener('mousemove', dragListener);
+            });
+            div.addEventListener('mousemove', dragListener);
         });
-        div.addEventListener('mouseup', (e) => {
-			div.removeEventListener('mousemove', dragListener);
-		});
-		div.addEventListener('mousemove', dragListener);
-	});
     }
     
     hs.div = div;