feat(onError): add onError prop #2772

packages/core/src/store/initialState.ts

@@ -1,3 +1,4 @@
+import { devWarn } from '../utils';
 import { ConnectionMode } from '../types';
 import type { CoordinateExtent, ReactFlowStore } from '../types';
 
@@ -59,6 +60,7 @@ const initialState: ReactFlowStore = {
   autoPanOnConnect: true,
   autoPanOnNodeDrag: true,
   connectionRadius: 20,
+  onError: devWarn,
 };
 
 export default initialState;