Edge Label Renderer

If you want to escape SVG world within an edge, you can use the <EdgeLabelRenderer />. It’s a portal component that lets you render edge labels as divs on top of the edges. If you want to add mouse interactions you need to set pointer-events: all on the label.

import React, { useCallback } from 'react';
import {
  ReactFlow,
  Controls,
  Background,
  addEdge,
  useEdgesState,
  useNodesState,
  type EdgeTypes,
  type Edge,
  type OnConnect,
  type Node,
} from '@xyflow/react';
 
import '@xyflow/react/dist/style.css';
 
 
import CustomEdge from './CustomEdge';
import CustomEdgeStartEnd from './CustomEdgeStartEnd';
 
const initialNodes: Node[] = [
  {
    id: '1',
    type: 'input',
    data: { label: 'Node 1' },
    position: { x: 0, y: 0 },
  },
  { id: '2', data: { label: 'Node 2' }, position: { x: 0, y: 300 } },
  { id: '3', data: { label: 'Node 3' }, position: { x: 200, y: 0 } },
  { id: '4', data: { label: 'Node 4' }, position: { x: 200, y: 300 } },
];
 
const initialEdges: Edge[] = [
  {
    id: 'e1-2',
    source: '1',
    target: '2',
    data: {
      label: 'edge label',
    },
    type: 'custom',
  },
  {
    id: 'e3-4',
    source: '3',
    target: '4',
    data: {
      startLabel: 'start edge label',
      endLabel: 'end edge label',
    },
    type: 'start-end',
  },
];
 
const edgeTypes: EdgeTypes = {
  custom: CustomEdge,
  'start-end': CustomEdgeStartEnd,
};
 
const EdgesFlow = () => {
  const [nodes, , onNodesChange] = useNodesState(initialNodes);
  const [edges, setEdges, onEdgesChange] = useEdgesState(initialEdges);
  const onConnect: OnConnect = useCallback(
    (params) => setEdges((eds) => addEdge(params, eds)),
    [setEdges],
  );
 
  return (
    <ReactFlow
      nodes={nodes}
      edges={edges}
      onNodesChange={onNodesChange}
      onEdgesChange={onEdgesChange}
      onConnect={onConnect}
      edgeTypes={edgeTypes}
      fitView
      style={{ backgroundColor: "#F7F9FB" }}
      >
        <Controls />
        <Background />
      </ReactFlow>
  );
};
 
export default EdgesFlow;

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