matplotlib
diff --git a/‎lib/matplotlib/backends/backend_webagg_core.py
Copy file name to clipboardExpand all lines: lib/matplotlib/backends/backend_webagg_core.py
+2-1Lines changed: 2 additions & 1 deletion b/‎lib/matplotlib/backends/backend_webagg_core.py
Copy file name to clipboardExpand all lines: lib/matplotlib/backends/backend_webagg_core.py
+2-1Lines changed: 2 additions & 1 deletion
@@ -343,7 +343,8 @@ def handle_set_dpi_ratio(self, event):
             self.draw_idle()
 
     def send_event(self, event_type, **kwargs):
-        self.manager._send_event(event_type, **kwargs)
+        if self.manager:
+            self.manager._send_event(event_type, **kwargs)
 
 
 _JQUERY_ICON_CLASSES = {