Update app.py

app.py

@@ -31,17 +31,16 @@ def main():
                 var lng = event.latLng.lng();
                 var message = 'Selected Coordinates: ' + lat + ', ' + lng;
                 document.getElementById('selected-coordinates').innerHTML = message;
-                Streamlit.setComponentValue({{ lat: lat, lng: lng }});
+                Streamlit.setSessionState({{ lat: lat, lng: lng }});
             }}
         </script>
     """
-    result = st.components.v1.html(map_code, height=600, scrolling=True)
+    st.components.v1.html(map_code, height=600, scrolling=True)
 
-    # Get the selected coordinates from the JavaScript callback
-    if result:
-        selected_coordinates = st.session_state.lat, st.session_state.lng
-        if selected_coordinates:
-            st.write(f"Selected Coordinates: {selected_coordinates[0]}, {selected_coordinates[1]}")
+    # Get the selected coordinates from the session state
+    selected_coordinates = st.session_state.lat, st.session_state.lng
+    if selected_coordinates[0] is not None and selected_coordinates[1] is not None:
+        st.write(f"Selected Coordinates: {selected_coordinates[0]}, {selected_coordinates[1]}")
 
 if __name__ == "__main__":
     main()