Creating Multiple Edges Between Nodes in React Flow: A 2026 Guide

React Flow is a powerful library for building diagrams and visualizations in React applications. It provides a flexible and intuitive way to create flowcharts, process diagrams, and other node-based structures. However, when it comes to creating multiple edges between two nodes, users often encounter issues where only one edge is rendered. In this guide, we'll explore how to solve this problem and ensure that all edges are displayed correctly.

Key Takeaways

• Understand the structure and configuration of nodes and edges in React Flow.
• Learn to properly configure multiple edges between two nodes.
• Identify common pitfalls and errors when rendering multiple edges.
• Gain insights into troubleshooting and customizing React Flow for advanced use cases.

Introduction

In this tutorial, you'll learn how to create multiple edges between two nodes in React Flow. This is a common requirement when visualizing complex relationships and workflows where a single connection is insufficient. Understanding how to handle this scenario is crucial for building accurate and effective diagrams.

We will cover the basics of setting up nodes and edges in React Flow, discuss the issues that may arise when rendering multiple edges, and provide solutions to ensure all edges are displayed as intended. By the end of this tutorial, you'll be equipped to tackle similar challenges in your projects.

Prerequisites

• Basic knowledge of React and JavaScript.
• Familiarity with React Flow library (version 10.0+ as of 2026).
• Node.js and npm installed on your development environment.

Step 1: Set Up Your React Flow Project

First, let's set up a new React project and install React Flow. Ensure you have Node.js and npm installed on your machine.

npx create-react-app react-flow-example
cd react-flow-example
npm install reactflow

After setting up the project, create a new component called MyFlow where we will implement our flowchart.

Step 2: Define Nodes and Edges

In React Flow, nodes and edges are defined as arrays of objects. Each object represents a node or an edge with specific properties. Let's define two nodes and multiple edges between them.

import React from 'react';
import ReactFlow, { MiniMap, Controls, Background } from 'reactflow';
import 'reactflow/dist/style.css';

const initialNodes = [
  { id: '1', position: { x: 0, y: 0 }, data: { label: 'Node 1' } },
  { id: '2', position: { x: 200, y: 100 }, data: { label: 'Node 2' } },
];

const initialEdges = [
  { id: 'e1-2a', source: '1', target: '2', label: 'Edge A' },
  { id: 'e1-2b', source: '1', target: '2', label: 'Edge B' },
  { id: 'e1-2c', source: '1', target: '2', label: 'Edge C' },
];

Here, we have defined three edges between Node 1 and Node 2, each with a unique ID and label. This is crucial for React Flow to differentiate between multiple edges.

Step 3: Render the Flow

Now, let's render the nodes and edges using the ReactFlow component. This component will automatically handle the layout and interaction of the nodes and edges.

function MyFlow() {
  return (
    
      
        
        
        
      
    
  );
}

export default MyFlow;

In this setup, the MiniMap, Controls, and Background components are optional but provide additional functionality like navigation and zooming.

Step 4: Customize Edge Styles

Customizing the appearance of edges can help distinguish them visually. React Flow allows you to style edges using CSS classes or inline styles.

const customEdgeStyles = {
  stroke: '#ff6c00',
  strokeWidth: 2,
};

const initialEdges = [
  { id: 'e1-2a', source: '1', target: '2', type: 'smoothstep', style: customEdgeStyles },
  { id: 'e1-2b', source: '1', target: '2', type: 'smoothstep', style: customEdgeStyles },
  { id: 'e1-2c', source: '1', target: '2', type: 'smoothstep', style: customEdgeStyles },
];

This example uses the 'smoothstep' type for edges, which provides a curved connection line. Adjust the stroke and strokeWidth to fit your design needs.

Common Errors/Troubleshooting

• Unique ID Requirement: Ensure each edge has a unique ID. Duplicate IDs will lead to rendering issues.
• Incorrect Node IDs: Double-check the source and target IDs in your edges to ensure they match the node IDs.
• Render Order: Sometimes, the order of nodes and edges in their respective arrays can affect rendering. Experiment with different orders if issues arise.

Conclusion

By following this guide, you should be able to create multiple edges between two nodes in React Flow without any issues. This capability is essential for accurately representing complex workflows and relationships in your applications. Remember to always define unique IDs for your edges and nodes to avoid rendering conflicts.

Frequently Asked Questions

Can I add additional properties to edges?

Yes, you can add custom properties to edges and use them for styling or interaction logic.

How can I customize the node appearance?

You can use the data property of nodes to pass custom styles or components for rendering nodes.

Why are my edges not displaying?

Check for duplicate IDs or incorrect source and target node IDs in your edge definitions.

Frequently Asked Questions

Can I add additional properties to edges?

Yes, you can add custom properties to edges and use them for styling or interaction logic.

How can I customize the node appearance?

You can use the data property of nodes to pass custom styles or components for rendering nodes.

Why are my edges not displaying?

Check for duplicate IDs or incorrect source and target node IDs in your edge definitions.