applyNodeChanges()

Source on GitHub (opens in a new tab)

Various events on the <ReactFlow /> component can produce an NodeChange that describes how to update the edges of your flow in some way. If you don't need any custom behaviour, this util can be used to take an array of these changes and apply them to your edges.

import { useState, useCallback } from 'react';
import ReactFlow, { applyNodeChanges } from 'reactflow';
 
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} />
  );
}

Signature

Name	Type
#Params
#`changes`	`NodeChange[]`
#`nodes`	`Node[]`
#Returns
#	`Node[]`

Notes

If you don't need any custom behaviour, the useNodesState hook conviniently wraps this util and React's useState hook for you and might be simpler to use.

applyEdgeChanges()getBezierPath()