refactor(errors): show error when user drags uninitialized node #5014

examples/react/src/App/routes.ts

@@ -1,5 +1,6 @@
 import Basic from '../examples/Basic';
 import Backgrounds from '../examples/Backgrounds';
+import BrokenNodes from '../examples/BrokenNodes';
 import ColorMode from '../examples/ColorMode';
 import ClickDistance from '../examples/ClickDistance';
 import ControlledUncontrolled from '../examples/ControlledUncontrolled';
@@ -77,6 +78,11 @@ const routes: IRoute[] = [
     path: 'backgrounds',
     component: Backgrounds,
   },
+  {
+    name: 'Broken Nodes',
+    path: 'broken-nodes',
+    component: BrokenNodes,
+  },
   {
     name: 'Color Mode',
     path: 'color-mode',

examples/react/src/examples/BrokenNodes/index.tsx

@@ -0,0 +1,80 @@
+import { useCallback, useState } from 'react';
+import { ReactFlow, addEdge, Node, Connection, Edge, OnNodeDrag } from '@xyflow/react';
+
+const nodesInit: Node[] = [
+  {
+    id: '1a',
+    type: 'input',
+    data: { label: 'Node 1' },
+    position: { x: 250, y: 5 },
+    className: 'light',
+    ariaLabel: 'Input Node 1',
+  },
+  {
+    id: '2a',
+    data: { label: 'Node 2' },
+    position: { x: 100, y: 100 },
+    className: 'light',
+    ariaLabel: 'Default Node 2',
+  },
+  {
+    id: '3a',
+    data: { label: 'Node 3' },
+    position: { x: 400, y: 100 },
+    className: 'light',
+  },
+  {
+    id: '4a',
+    data: { label: 'Node 4' },
+    position: { x: 400, y: 200 },
+    className: 'light',
+  },
+];
+
+const edgesInit: Edge[] = [
+  { id: 'e1-2', source: '1a', target: '2a', ariaLabel: undefined },
+  { id: 'e1-3', source: '1a', target: '3a' },
+];
+
+const onNodesChange = () => {};
+const onEdgesChange = () => {};
+const BasicFlow = () => {
+  const [nodes, setNodes] = useState(nodesInit);
+  const [edges, setEdges] = useState(edgesInit);
+
+  const onConnect = useCallback((params: Connection | Edge) => setEdges((eds) => addEdge(params, eds)), [setEdges]);
+
+  const onNodeDrag: OnNodeDrag = useCallback((e, node) => {
+    if (isNaN(node.position.x) || isNaN(node.position.y)) {
+      console.log('received NaN', node.position);
+    }
+
+    setNodes((nds) => {
+      return nds.map((item) => {
+        if (item.id === node.id) {
+          return {
+            ...item,
+            position: {
+              x: node.position.x,
+              y: node.position.y,
+            },
+          };
+        }
+        return item;
+      });
+    });
+  }, []);
+
+  return (
+    <ReactFlow
+      nodes={nodes}
+      edges={edges}
+      onNodesChange={onNodesChange}
+      onEdgesChange={onEdgesChange}
+      onConnect={onConnect}
+      onNodeDrag={onNodeDrag}
+    ></ReactFlow>
+  );
+};
+
+export default BasicFlow;