Feature: Draggable edge

example/src/DraggableEdge/index.js

@@ -0,0 +1,87 @@
+import React, { useState } from 'react';
+
+import ReactFlow, { MiniMap, Controls, Background, updateEdge } from 'react-flow-renderer';
+
+const onLoad = (reactFlowInstance) => {
+  console.log('flow loaded:', reactFlowInstance);
+  reactFlowInstance.fitView();
+};
+
+const initialElements = [
+  {
+    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: 100, y: 100 },
+  },
+  {
+    id: '3',
+    data: {
+      label: (
+        <>
+          Node <strong>C</strong>
+        </>
+      ),
+    },
+    position: { x: 400, y: 100 },
+    style: { background: '#D6D5E6', color: '#333', border: '1px solid #222138', width: 180 },
+  },
+  { id: 'e1-2', source: '1', target: '2', label: 'This is a draggable edge' },
+];
+
+const snapGrid = [16, 16];
+
+const DragEdge = () => {
+  const [elements, setElements] = useState(initialElements);
+  const onEdgeUpdate = (oldEdge, newConnection) => {
+    setElements((els) => updateEdge(oldEdge, newConnection, els));
+  }
+
+  return (
+    <ReactFlow
+      elements={elements}
+      onLoad={onLoad}
+      snapToGrid={true}
+      snapGrid={snapGrid}
+      onEdgeUpdate={onEdgeUpdate}
+    >
+      <MiniMap
+        nodeStrokeColor={(n) => {
+          if (n.style?.background) return n.style.background;
+          if (n.type === 'input') return '#0041d0';
+          if (n.type === 'output') return '#ff0072';
+          if (n.type === 'default') return '#1a192b';
+
+          return '#eee';
+        }}
+        nodeColor={(n) => {
+          if (n.style?.background) return n.style.background;
+
+          return '#fff';
+        }}
+        borderRadius={2}
+      />
+      <Controls />
+      <Background color="#aaa" gap={16} />
+    </ReactFlow>
+  );
+};
+
+export default DragEdge;

example/src/index.js

@@ -16,6 +16,7 @@ import Hidden from './Hidden';
 import EdgeTypes from './EdgeTypes';
 import CustomConnectionLine from './CustomConnectionLine';
 import NodeTypeChange from './NodeTypeChange';
+import DraggableEdge from './DraggableEdge';
 
 import './index.css';
 
@@ -84,6 +85,11 @@ const routes = [
     path: '/nodetype-change',
     component: NodeTypeChange,
   },
+  {
+    path: '/draggable-edge',
+    component: DraggableEdge,
+    label: 'Draggable Edge',
+  },
 ];
 
 const navLinks = routes.filter((route) => route.label);