feat(node-resizer): add onBeforeResize handler

examples/vite-app/src/examples/NodeResizer/CustomResizer.tsx

@@ -1,7 +1,7 @@
-import { memo, FC, CSSProperties } from 'react';
+import { memo, FC } from 'react';
 import { Handle, Position, NodeProps } from 'reactflow';
 
-import { NodeResizer, NodeResizeControl } from '@reactflow/node-resizer';
+import { NodeResizeControl } from '@reactflow/node-resizer';
 import '@reactflow/node-resizer/dist/style.css';
 import ResizeIcon from './ResizeIcon';
 

examples/vite-app/src/examples/NodeResizer/CustomResizer2.tsx

@@ -1,14 +1,14 @@
 import { memo, FC } from 'react';
 import { Handle, Position, NodeProps } from 'reactflow';
 
-import { NodeResizer, NodeResizeControl } from '@reactflow/node-resizer';
+import { NodeResizeControl } from '@reactflow/node-resizer';
 import '@reactflow/node-resizer/dist/style.css';
 
 const CustomNode: FC<NodeProps> = ({ id, data }) => {
   return (
     <>
-      <NodeResizeControl color="red" position="top" />
-      <NodeResizeControl color="red" position="bottom" />
+      <NodeResizeControl color="red" position={Position.Top} />
+      <NodeResizeControl color="red" position={Position.Bottom} />
       <Handle type="target" position={Position.Left} />
       <div style={{ padding: 10 }}>{data.label}</div>
       <Handle type="source" position={Position.Right} />

examples/vite-app/src/examples/NodeResizer/CustomResizer3.tsx

@@ -0,0 +1,31 @@
+import { memo, FC } from 'react';
+import { Handle, Position, NodeProps } from 'reactflow';
+
+import { NodeResizeControl, ResizeDragEvent, ResizeEventParams } from '@reactflow/node-resizer';
+import '@reactflow/node-resizer/dist/style.css';
+
+const onBeforeResize = (event: ResizeDragEvent, params: ResizeEventParams) => {
+  console.log('before resize', params);
+
+  if (params.width > 100) {
+    return false;
+  }
+};
+
+const onResize = (event: ResizeDragEvent, params: ResizeEventParams) => {
+  console.log('resize', params);
+};
+
+const CustomNode: FC<NodeProps> = ({ id, data }) => {
+  return (
+    <>
+      <NodeResizeControl color="red" position={Position.Left} />
+      <NodeResizeControl color="red" position={Position.Right} onBeforeResize={onBeforeResize} onResize={onResize} />
+      <Handle type="target" position={Position.Top} />
+      <div style={{ padding: 10 }}>{data.label}</div>
+      <Handle type="source" position={Position.Bottom} />
+    </>
+  );
+};
+
+export default memo(CustomNode);

examples/vite-app/src/examples/NodeResizer/NodeResizerNode.tsx

@@ -8,6 +8,10 @@ const onResizeStart = (_: ResizeDragEvent, params: ResizeEventParams) => {
   console.log('resize start', params);
 };
 
+const onBeforeResize = (_: ResizeDragEvent, params: ResizeEventParams) => {
+  console.log('before resize', params);
+};
+
 const onResize = (_: ResizeDragEvent, params: ResizeEventParams) => {
   console.log('resize', params);
 };
@@ -24,6 +28,7 @@ const CustomNode: FC<NodeProps> = ({ data, selected }) => {
         minHeight={100}
         isVisible={selected}
         onResizeStart={onResizeStart}
+        onBeforeResize={onBeforeResize}
         onResize={onResize}
         onResizeEnd={onResizeEnd}
       />

examples/vite-app/src/examples/NodeResizer/index.tsx

@@ -4,11 +4,13 @@ import ReactFlow, { Controls, addEdge, Position, Connection, useNodesState, useE
 import NodeResizerNode from './NodeResizerNode';
 import CustomResizer from './CustomResizer';
 import CustomResizer2 from './CustomResizer2';
+import CustomResizer3 from './CustomResizer3';
 
 const nodeTypes = {
   resizer: NodeResizerNode,
   customResizer: CustomResizer,
   customResizer2: CustomResizer2,
+  customResizer3: CustomResizer3,
 };
 
 const initialEdges = [
@@ -60,6 +62,13 @@ const initialNodes = [
     position: { x: 250, y: 250 },
     style: { border: '1px solid #222', fontSize: 10 },
   },
+  {
+    id: '6',
+    type: 'customResizer3',
+    data: { label: 'resize controls' },
+    position: { x: 400, y: 200 },
+    style: { border: '1px solid #222', fontSize: 10 },
+  },
 ];
 
 const CustomNodeFlow = () => {
@@ -87,7 +96,7 @@ const CustomNodeFlow = () => {
     >
       <Controls />
       <Panel position="bottom-right">
-        <button onClick={() => setSnapToGrid(!snapToGrid)}>snapToGrid: {snapToGrid ? 'on' : 'off'}</button>
+        <button onClick={() => setSnapToGrid((s) => !s)}>snapToGrid: {snapToGrid ? 'on' : 'off'}</button>
       </Panel>
     </ReactFlow>
   );