feat(edgeUpdate): add onEdgeUpdateStart handler closes #1120

src/container/EdgeRenderer/index.tsx

@@ -34,6 +34,7 @@ interface EdgeRendererProps {
   onEdgeMouseEnter?: (event: React.MouseEvent, edge: Edge) => void;
   onEdgeMouseMove?: (event: React.MouseEvent, edge: Edge) => void;
   onEdgeMouseLeave?: (event: React.MouseEvent, edge: Edge) => void;
+  onEdgeUpdateStart?: (event: React.MouseEvent, edge: Edge) => void;
   edgeUpdaterRadius?: number;
 }
 
@@ -175,6 +176,7 @@ const Edge = ({
       onMouseLeave={props.onEdgeMouseLeave}
       edgeUpdaterRadius={props.edgeUpdaterRadius}
       onEdgeDoubleClick={props.onEdgeDoubleClick}
+      onEdgeUpdateStart={props.onEdgeUpdateStart}
     />
   );
 };