Reconnect Edge

import React, { useCallback } from 'react';
import {
  ReactFlow,
  Background,
  useNodesState,
  useEdgesState,
  Controls,
  reconnectEdge,
  addEdge,
} from '@xyflow/react';
 
import '@xyflow/react/dist/style.css';
 
 
const initialNodes = [
  {
    id: '1',
    type: 'input',
    data: {
      label: (
        <>
          Node <strong>A</strong>
        </>
      ),
    },
    position: { x: 250, y: 0 },
  },
  {
    id: '2',
    data: {
      label: (
        <>
          Node <strong>B</strong>
        </>
      ),
    },
    position: { x: 75, y: 0 },
  },
  {
    id: '3',
    data: {
      label: (
        <>
          Node <strong>C</strong>
        </>
      ),
    },
    position: { x: 400, y: 100 },
    style: {
      background: '#D6D5E6',
      color: '#333',
      width: 180,
    },
  },
  {
    id: '4',
    data: {
      label: (
        <>
          Node <strong>D</strong>
        </>
      ),
    },
    position: { x: -75, y: 100 },
  },
  {
    id: '5',
    data: {
      label: (
        <>
          Node <strong>E</strong>
        </>
      ),
    },
    position: { x: 150, y: 100 },
  },
  {
    id: '6',
    data: {
      label: (
        <>
          Node <strong>F</strong>
        </>
      ),
    },
    position: { x: 150, y: 250 },
  },
];
 
const initialEdges = [
  {
    id: 'e1-3',
    source: '1',
    target: '3',
    label: 'This edge can only be updated from source',
    reconnectable: 'source',
  },
  {
    id: 'e2-4',
    source: '2',
    target: '4',
    label: 'This edge can only be updated from target',
    reconnectable: 'target',
  },
  {
    id: 'e5-6',
    source: '5',
    target: '6',
    label: 'This edge can be updated from both sides',
  },
];
 
const EdgeReconnect = () => {
  const [nodes, setNodes, onNodesChange] = useNodesState(initialNodes);
  const [edges, setEdges, onEdgesChange] = useEdgesState(initialEdges);
  // gets called after end of edge gets dragged to another source or target
  const onReconnect = useCallback(
    (oldEdge, newConnection) =>
      setEdges((els) => reconnectEdge(oldEdge, newConnection, els)),
    [],
  );
  const onConnect = useCallback(
    (params) => setEdges((els) => addEdge(params, els)),
    [],
  );
 
  return (
    <ReactFlow
      nodes={nodes}
      edges={edges}
      onNodesChange={onNodesChange}
      onEdgesChange={onEdgesChange}
      snapToGrid
      onReconnect={onReconnect}
      onConnect={onConnect}
      fitView
      attributionPosition="top-right"
      style={{ backgroundColor: "#F7F9FB" }}
      >
        <Controls />
        <Background />
      </ReactFlow>
  );
};
 
export default EdgeReconnect;