applyNodeChanges()

import { useState, useCallback } from 'react';
import { ReactFlow, applyNodeChanges } from '@xyflow/react';
 
export default function Flow() {
  const [nodes, setNodes] = useState([]);
  const [edges, setEdges] = useState([]);
  const onNodesChange = useCallback(
    (changes) => {
      setNodes((oldNodes) => applyNodeChanges(changes, oldNodes));
    },
    [setNodes],
  );
 
  return (
    <ReactFlow nodes={nodes} edges={edges} onNodesChange={onNodesChange} />
  );
}