Feat: add hooks and functions for computed flows (#3688)

Feat: add hooks for computed flows

examples/react/src/App/routes.ts

@@ -44,7 +44,9 @@ import CancelConnection from '../examples/CancelConnection';
 import InteractiveMinimap from '../examples/InteractiveMinimap';
 import UseOnSelectionChange from '../examples/UseOnSelectionChange';
 import NodeToolbar from '../examples/NodeToolbar';
-import useNodesInitialized from '../examples/UseNodesInit';
+import UseNodesInitialized from '../examples/UseNodesInit';
+import UseNodesData from '../examples/UseNodesData';
+import UseHandleConnections from '../examples/UseHandleConnections';
 
 export interface IRoute {
   name: string;
@@ -261,7 +263,7 @@ const routes: IRoute[] = [
   {
     name: 'useNodesInitialized',
     path: 'use-nodes-initialized',
-    component: useNodesInitialized,
+    component: UseNodesInitialized,
   },
   {
     name: 'useOnSelectionChange',
@@ -273,6 +275,16 @@ const routes: IRoute[] = [
     path: 'usereactflow',
     component: UseReactFlow,
   },
+  {
+    name: 'useHandleConnections',
+    path: 'usehandleconnections',
+    component: UseHandleConnections,
+  },
+  {
+    name: 'useNodesData',
+    path: 'usenodesdata',
+    component: UseNodesData,
+  },
   {
     name: 'useUpdateNodeInternals',
     path: 'useupdatenodeinternals',

examples/react/src/examples/CustomNode/ColorSelectorNode.tsx

@@ -1,4 +1,4 @@
-import React, { memo, FC, CSSProperties, useCallback } from 'react';
+import React, { memo, FC, CSSProperties, useCallback, useEffect } from 'react';
 import { Handle, Position, NodeProps, Connection, Edge, useOnViewportChange, Viewport } from '@xyflow/react';
 
 const targetHandleStyle: CSSProperties = { background: '#555' };

examples/react/src/examples/UpdateNode/index.tsx

@@ -1,5 +1,5 @@
 import { useEffect, useState } from 'react';
-import { ReactFlow, Node, Edge, useNodesState, useEdgesState } from '@xyflow/react';
+import { ReactFlow, Node, Edge, useNodesState, useEdgesState, ReactFlowProvider, useReactFlow } from '@xyflow/react';
 
 import styles from './updatenode.module.css';
 
@@ -13,6 +13,7 @@ const initialEdges: Edge[] = [{ id: 'e1-2', source: '1', target: '2' }];
 const UpdateNode = () => {
   const [nodes, setNodes, onNodesChange] = useNodesState(initialNodes);
   const [edges, setEdges, onEdgesChange] = useEdgesState(initialEdges);
+  const { updateNode } = useReactFlow();
 
   const [nodeName, setNodeName] = useState<string>('Node 1');
   const [nodeBg, setNodeBg] = useState<string>('#eee');
@@ -80,9 +81,19 @@ const UpdateNode = () => {
           <label>hidden:</label>
           <input type="checkbox" checked={nodeHidden} onChange={(evt) => setNodeHidden(evt.target.checked)} />
         </div>
+
+        <button
+          onClick={() => updateNode('1', (node) => ({ position: { x: node.position.x + 10, y: node.position.y } }))}
+        >
+          update position
+        </button>
       </div>
     </ReactFlow>
   );
 };
 
-export default UpdateNode;
+export default () => (
+  <ReactFlowProvider>
+    <UpdateNode />
+  </ReactFlowProvider>
+);

examples/react/src/examples/UseHandleConnections/MultiHandleNode.tsx

@@ -0,0 +1,39 @@
+import { memo, FC, useEffect, useCallback } from 'react';
+import { Handle, Position, NodeProps, useHandleConnections, Connection, HandleComponentProps } from '@xyflow/react';
+
+function CustomHandle({ nodeId, ...handleProps }: HandleComponentProps & { nodeId: string }) {
+  const onConnect = useCallback(
+    (connections: Connection[]) => console.log('onConnect handler, node id:', nodeId, connections),
+    [nodeId]
+  );
+
+  const onDisconnect = useCallback(
+    (connections: Connection[]) => console.log('onDisconnect handler, node id:', nodeId, connections),
+    [nodeId]
+  );
+  const connections = useHandleConnections({
+    handleType: handleProps.type,
+    handleId: handleProps.id,
+    onConnect,
+    onDisconnect,
+  });
+
+  useEffect(() => {
+    console.log('useEffect, node id:', nodeId, handleProps.type, connections);
+  }, [connections]);
+
+  return <Handle {...handleProps} />;
+}
+
+const CustomNode: FC<NodeProps> = ({ id }) => {
+  return (
+    <div style={{ background: '#333', color: '#fff', padding: 10, fontSize: 12, borderRadius: 10 }}>
+      <CustomHandle nodeId={id} type="target" position={Position.Left} />
+      <div>node {id}</div>
+      <CustomHandle nodeId={id} type="source" position={Position.Right} id="a" style={{ top: 10 }} />
+      <CustomHandle nodeId={id} type="source" position={Position.Right} id="b" style={{ top: 20 }} />
+    </div>
+  );
+};
+
+export default memo(CustomNode);

examples/react/src/examples/UseHandleConnections/SingleHandleNode.tsx

@@ -0,0 +1,41 @@
+import { memo, FC, useEffect, useCallback } from 'react';
+import { Handle, Position, NodeProps, useHandleConnections, Connection, HandleComponentProps } from '@xyflow/react';
+
+function CustomHandle({ nodeId, ...handleProps }: HandleComponentProps & { nodeId: string }) {
+  const onConnect = useCallback(
+    (connections: Connection[]) => {
+      console.log('onConnect handler, node id:', nodeId, connections);
+    },
+    [nodeId]
+  );
+  const onDisconnect = useCallback(
+    (connections: Connection[]) => {
+      console.log('onDisconnect handler, node id:', nodeId, connections);
+    },
+    [nodeId]
+  );
+  const connections = useHandleConnections({
+    handleType: handleProps.type,
+    handleId: handleProps.id,
+    onConnect,
+    onDisconnect,
+  });
+
+  useEffect(() => {
+    console.log('useEffect, node id:', nodeId, handleProps.type, connections);
+  }, [connections]);
+
+  return <Handle {...handleProps} />;
+}
+
+const CustomNode: FC<NodeProps> = ({ id }) => {
+  return (
+    <div style={{ background: '#333', color: '#fff', padding: 10, fontSize: 12, borderRadius: 10 }}>
+      <CustomHandle nodeId={id} type="target" position={Position.Left} />
+      <div>node {id}</div>
+      <CustomHandle nodeId={id} type="source" position={Position.Right} />
+    </div>
+  );
+};
+
+export default memo(CustomNode);

examples/react/src/examples/UseHandleConnections/index.tsx

@@ -0,0 +1,118 @@
+import { useCallback } from 'react';
+import {
+  ReactFlow,
+  MiniMap,
+  Controls,
+  addEdge,
+  Connection,
+  useNodesState,
+  useEdgesState,
+  Background,
+} from '@xyflow/react';
+
+import MultiHandleNode from './MultiHandleNode';
+import SingleHandleNode from './SingleHandleNode';
+
+const nodeTypes = {
+  multi: MultiHandleNode,
+  single: SingleHandleNode,
+};
+
+const initNodes = [
+  {
+    id: '1',
+    type: 'single',
+    data: {},
+    position: { x: 0, y: 0 },
+  },
+  {
+    id: '2',
+    type: 'single',
+    data: {},
+    position: { x: 200, y: -100 },
+  },
+  {
+    id: '3',
+    type: 'single',
+    data: {},
+    position: { x: 200, y: 100 },
+  },
+
+  {
+    id: '4',
+    type: 'multi',
+    data: {},
+    position: { x: 400, y: 0 },
+  },
+  {
+    id: '5',
+    type: 'multi',
+    data: {},
+    position: { x: 600, y: -100 },
+  },
+  {
+    id: '6',
+    type: 'multi',
+    data: {},
+    position: { x: 600, y: 100 },
+  },
+];
+
+const initEdges = [
+  {
+    id: 'e1-2',
+    source: '1',
+    target: '2',
+  },
+  {
+    id: 'e1-3',
+    source: '1',
+    target: '3',
+  },
+
+  {
+    id: 'e4a-5',
+    source: '4',
+    sourceHandle: 'a',
+    target: '5',
+  },
+  {
+    id: 'e4b-5',
+    source: '4',
+    sourceHandle: 'b',
+    target: '6',
+  },
+];
+
+const defaultEdgeOptions = {
+  animated: true,
+};
+
+const CustomNodeFlow = () => {
+  const [nodes, setNodes, onNodesChange] = useNodesState(initNodes);
+  const [edges, setEdges, onEdgesChange] = useEdgesState(initEdges);
+
+  const onConnect = useCallback((connection: Connection) => setEdges((eds) => addEdge(connection, eds)), [setEdges]);
+
+  return (
+    <ReactFlow
+      nodes={nodes}
+      edges={edges}
+      onNodesChange={onNodesChange}
+      onEdgesChange={onEdgesChange}
+      onConnect={onConnect}
+      nodeTypes={nodeTypes}
+      fitView
+      minZoom={0.3}
+      maxZoom={2}
+      colorMode="dark"
+      defaultEdgeOptions={defaultEdgeOptions}
+    >
+      <MiniMap />
+      <Controls />
+      <Background />
+    </ReactFlow>
+  );
+};
+
+export default CustomNodeFlow;

examples/react/src/examples/UseNodesData/ResultNode.tsx

@@ -0,0 +1,22 @@
+import { memo } from 'react';
+import { Handle, Position, useHandleConnections, useNodesData } from '@xyflow/react';
+
+function ResultNode() {
+  const connections = useHandleConnections({
+    type: 'target',
+  });
+  const nodesData = useNodesData(connections.map((connection) => connection.source));
+
+  return (
+    <div style={{ background: '#eee', color: '#222', padding: 10, fontSize: 12, borderRadius: 10 }}>
+      <Handle type="target" position={Position.Left} />
+      <div>
+        incoming texts:{' '}
+        {nodesData?.filter((nodeData) => nodeData.text !== undefined).map(({ text }, i) => <div key={i}>{text}</div>) ||
+          'none'}
+      </div>
+    </div>
+  );
+}
+
+export default memo(ResultNode);

examples/react/src/examples/UseNodesData/TextNode.tsx

@@ -0,0 +1,20 @@
+import { memo, ChangeEventHandler } from 'react';
+import { Position, NodeProps, Handle, useReactFlow } from '@xyflow/react';
+
+function TextNode({ id, data }: NodeProps) {
+  const { updateNodeData } = useReactFlow();
+
+  const onChange: ChangeEventHandler<HTMLInputElement> = (evt) => updateNodeData(id, { text: evt.target.value });
+
+  return (
+    <div style={{ background: '#eee', color: '#222', padding: 10, fontSize: 12, borderRadius: 10 }}>
+      <div>node {id}</div>
+      <div>
+        <input onChange={onChange} value={data.text} />
+      </div>
+      <Handle type="source" position={Position.Right} />
+    </div>
+  );
+}
+
+export default memo(TextNode);

examples/react/src/examples/UseNodesData/UppercaseNode.tsx

@@ -0,0 +1,24 @@
+import { memo, useEffect } from 'react';
+import { Position, NodeProps, useReactFlow, Handle, useHandleConnections, useNodesData } from '@xyflow/react';
+
+function UppercaseNode({ id }: NodeProps) {
+  const { updateNodeData } = useReactFlow();
+  const connections = useHandleConnections({
+    type: 'target',
+  });
+  const nodeData = useNodesData(connections[0]?.source);
+
+  useEffect(() => {
+    updateNodeData(id, { text: nodeData?.text.toUpperCase() });
+  }, [nodeData]);
+
+  return (
+    <div style={{ background: '#eee', color: '#222', padding: 10, fontSize: 12, borderRadius: 10 }}>
+      <Handle type="target" position={Position.Left} isConnectable={connections.length === 0} />
+      <div>uppercase transform</div>
+      <Handle type="source" position={Position.Right} />
+    </div>
+  );
+}
+
+export default memo(UppercaseNode);

examples/react/src/examples/UseNodesData/index.tsx

@@ -0,0 +1,102 @@
+import { useCallback } from 'react';
+import {
+  ReactFlow,
+  Controls,
+  addEdge,
+  Connection,
+  useNodesState,
+  useEdgesState,
+  Background,
+  Node,
+  Edge,
+} from '@xyflow/react';
+
+import TextNode from './TextNode';
+import ResultNode from './ResultNode';
+import UppercaseNode from './UppercaseNode';
+
+export type TextNode = Node<{ text: string }, 'text'>;
+export type ResultNode = Node<{}, 'result'>;
+export type UppercaseNode = Node<{}, 'uppercase'>;
+export type MyNode = Node<{ text: string }, 'text'> | Node<{}, 'result'> | Node<{}, 'uppercase'>;
+
+const nodeTypes = {
+  text: TextNode,
+  result: ResultNode,
+  uppercase: UppercaseNode,
+};
+
+const initNodes: MyNode[] = [
+  {
+    id: '1',
+    type: 'text',
+    data: {
+      text: 'hello',
+    },
+    position: { x: -100, y: -50 },
+  },
+  {
+    id: '1a',
+    type: 'uppercase',
+    data: {},
+    position: { x: 100, y: 0 },
+  },
+
+  {
+    id: '2',
+    type: 'text',
+    data: {
+      text: 'world',
+    },
+    position: { x: 0, y: 100 },
+  },
+
+  {
+    id: '3',
+    type: 'result',
+    data: {},
+    position: { x: 300, y: 50 },
+  },
+];
+
+const initEdges: Edge[] = [
+  {
+    id: 'e1-1a',
+    source: '1',
+    target: '1a',
+  },
+  {
+    id: 'e1a-3',
+    source: '1a',
+    target: '3',
+  },
+  {
+    id: 'e2-3',
+    source: '2',
+    target: '3',
+  },
+];
+
+const CustomNodeFlow = () => {
+  const [nodes, setNodes, onNodesChange] = useNodesState(initNodes);
+  const [edges, setEdges, onEdgesChange] = useEdgesState(initEdges);
+
+  const onConnect = useCallback((connection: Connection) => setEdges((eds) => addEdge(connection, eds)), [setEdges]);
+
+  return (
+    <ReactFlow
+      nodes={nodes}
+      edges={edges}
+      onNodesChange={onNodesChange}
+      onEdgesChange={onEdgesChange}
+      onConnect={onConnect}
+      nodeTypes={nodeTypes}
+      fitView
+    >
+      <Controls />
+      <Background />
+    </ReactFlow>
+  );
+};
+
+export default CustomNodeFlow;

examples/svelte/src/components/Header/Header.svelte

@@ -11,6 +11,7 @@
 		'drag-n-drop',
 		'edges',
 		'figma',
+		'handle-connect',
 		'interaction',
 		'intersections',
 		'node-toolbar',
@@ -18,6 +19,7 @@
 		'stress',
 		'subflows',
 		'two-way-viewport',
+		'usenodesdata',
 		'usesvelteflow',
 		'useupdatenodeinternals',
 		'validation'

examples/svelte/src/routes/examples/add-node-on-drop/Flow.svelte

@@ -1,6 +1,12 @@
 <script lang="ts">
 	import { writable } from 'svelte/store';
-	import { SvelteFlow, useSvelteFlow, type Edge, type Node } from '@xyflow/svelte';
+	import {
+		SvelteFlow,
+		useSvelteFlow,
+		type Edge,
+		type Node,
+		type OnConnectEnd
+	} from '@xyflow/svelte';
 
 	import '@xyflow/svelte/dist/style.css';
 
@@ -16,16 +22,18 @@
 	const nodes = writable<Node[]>(initialNodes);
 	const edges = writable<Edge[]>([]);
 
-	let connectingNodeId: string = '0';
+	let connectingNodeId: string | null = '0';
 	let rect: DOMRectReadOnly;
 	let id = 1;
 	const getId = () => `${id++}`;
 
 	const { screenToFlowPosition, flowToScreenPosition } = useSvelteFlow();
 
-	function handleConnectEnd({ detail: { event } }: { detail: { event: MouseEvent | TouchEvent } }) {
+	const handleConnectEnd: OnConnectEnd = (event) => {
+		if (!connectingNodeId) return;
+
 		// See of connection landed inside the flow pane
-		const targetIsPane = event.target?.classList.contains('svelte-flow__pane');
+		const targetIsPane = (event.target as HTMLDivElement)?.classList.contains('svelte-flow__pane');
 		if (targetIsPane) {
 			const id = getId();
 			const position = {
@@ -58,7 +66,7 @@
 			$nodes = $nodes;
 			$edges = $edges;
 		}
-	}
+	};
 </script>
 
 <svelte:window />
@@ -69,11 +77,11 @@
 		{edges}
 		fitView
 		fitViewOptions={{ padding: 2 }}
-		on:connectstart={({ detail: { nodeId } }) => {
+		onconnectstart={(_, { nodeId }) => {
 			// Memorize the nodeId you start draggin a connection line from a node
 			connectingNodeId = nodeId;
 		}}
-		on:connectend={handleConnectEnd}
+		onconnectend={handleConnectEnd}
 	/>
 </div>
 

examples/svelte/src/routes/examples/customnode/+page.svelte

@@ -87,7 +87,7 @@
 	{nodeTypes}
 	style="--xy-background-color: {$bgColor}"
 	fitView
-	on:connect={onConnect}
+	onconnect={onConnect}
 >
 	<Controls />
 	<Background variant={BackgroundVariant.Dots} />

examples/svelte/src/routes/examples/customnode/CustomNode.svelte

@@ -1,6 +1,6 @@
 <script lang="ts">
 	import type { Writable } from 'svelte/store';
-	import { Handle, Position, type NodeProps, BezierEdge, SmoothStepEdge } from '@xyflow/svelte';
+	import { Handle, Position, type NodeProps } from '@xyflow/svelte';
 
 	type $$Props = NodeProps;
 
@@ -10,7 +10,7 @@
 </script>
 
 <div class="custom">
-	<Handle type="target" position={Position.Left} on:connect />
+	<Handle type="target" position={Position.Left} />
 	<div>
 		Custom Color Picker Node: <strong>{$colorStore}</strong>
 	</div>
@@ -20,14 +20,8 @@
 		on:input={(evt) => colorStore.set(evt.currentTarget.value)}
 		value={$colorStore}
 	/>
-	<Handle type="source" position={Position.Right} id="a" style="top: 20px;" on:connect />
+	<Handle type="source" position={Position.Right} id="a" style="top: 20px;" />
-	<Handle
+	<Handle type="source" position={Position.Right} id="b" style="top: auto; bottom: 10px;" />
-		type="source"
-		position={Position.Right}
-		id="b"
-		style="top: auto; bottom: 10px;"
-		on:connect
-	/>
 </div>
 
 <style>

examples/svelte/src/routes/examples/handle-connect/+page.svelte

@@ -0,0 +1,94 @@
+<script lang="ts">
+	import { writable } from 'svelte/store';
+	import {
+		SvelteFlow,
+		Controls,
+		Background,
+		BackgroundVariant,
+		MiniMap,
+		type Node,
+		type NodeTypes,
+		type Edge
+	} from '@xyflow/svelte';
+	import SingleHandleNode from './SingleHandleNode.svelte';
+	import MultiHandleNode from './MultiHandleNode.svelte';
+
+	import '@xyflow/svelte/dist/style.css';
+
+	const nodeTypes: NodeTypes = {
+		single: SingleHandleNode,
+		multi: MultiHandleNode
+	};
+
+	const nodes = writable<Node[]>([
+		{
+			id: '1',
+			type: 'single',
+			data: {},
+			position: { x: 0, y: 0 }
+		},
+		{
+			id: '2',
+			type: 'single',
+			data: {},
+			position: { x: 200, y: -100 }
+		},
+		{
+			id: '3',
+			type: 'single',
+			data: {},
+			position: { x: 200, y: 100 }
+		},
+
+		{
+			id: '4',
+			type: 'multi',
+			data: {},
+			position: { x: 400, y: 0 }
+		},
+		{
+			id: '5',
+			type: 'multi',
+			data: {},
+			position: { x: 600, y: -100 }
+		},
+		{
+			id: '6',
+			type: 'multi',
+			data: {},
+			position: { x: 600, y: 100 }
+		}
+	]);
+
+	const edges = writable<Edge[]>([
+		{
+			id: 'e1-2',
+			source: '1',
+			target: '2'
+		},
+		{
+			id: 'e1-3',
+			source: '1',
+			target: '3'
+		},
+
+		{
+			id: 'e4a-5',
+			source: '4',
+			sourceHandle: 'a',
+			target: '5'
+		},
+		{
+			id: 'e4b-5',
+			source: '4',
+			sourceHandle: 'b',
+			target: '6'
+		}
+	]);
+</script>
+
+<SvelteFlow {nodes} {edges} {nodeTypes} fitView colorMode="dark">
+	<Controls />
+	<Background variant={BackgroundVariant.Dots} />
+	<MiniMap />
+</SvelteFlow>

examples/svelte/src/routes/examples/handle-connect/MultiHandleNode.svelte

@@ -0,0 +1,110 @@
+<script lang="ts">
+	import {
+		Handle,
+		Position,
+		type NodeProps,
+		type Connection,
+		useHandleConnections
+	} from '@xyflow/svelte';
+
+	type $$Props = NodeProps;
+
+	export let id: $$Props['id'];
+
+	function onConnectTarget(connection: Connection[]) {
+		console.log('connect target', connection);
+	}
+
+	function onConnectSource(handleId: string, connection: Connection[]) {
+		console.log('connect source', handleId, connection);
+	}
+
+	function onDisconnectTarget(connection: Connection[]) {
+		console.log('disconnect target', connection);
+	}
+
+	function onDisconnectSource(handleId: string, connection: Connection[]) {
+		console.log('disconnect source', handleId, connection);
+	}
+
+	const connections = useHandleConnections({ nodeId: id, type: 'target' });
+
+	$: {
+		console.log('connections', id, $connections);
+	}
+
+	export let data: $$Props['data'];
+	export let targetPosition: $$Props['targetPosition'] = Position.Top;
+	export let sourcePosition: $$Props['sourcePosition'] = Position.Bottom;
+	export let width: $$Props['width'] = undefined;
+	export let height: $$Props['height'] = undefined;
+	export let selected: $$Props['selected'] = undefined;
+	export let type: $$Props['type'] = undefined;
+	export let zIndex: $$Props['zIndex'] = undefined;
+	export let dragging: $$Props['dragging'] = false;
+	export let dragHandle: $$Props['dragHandle'] = undefined;
+	export let positionAbsolute: $$Props['positionAbsolute'] = {
+		x: 0,
+		y: 0
+	};
+	export let isConnectable: $$Props['isConnectable'] = undefined;
+
+	data;
+	targetPosition;
+	sourcePosition;
+	width;
+	height;
+	selected;
+	type;
+	zIndex;
+	dragging;
+	dragHandle;
+	positionAbsolute;
+	isConnectable;
+</script>
+
+<div class="custom">
+	<Handle
+		type="target"
+		position={Position.Left}
+		onconnect={onConnectTarget}
+		ondisconnect={onDisconnectTarget}
+	/>
+	<div>node {id}</div>
+	<Handle
+		id="a"
+		type="source"
+		position={Position.Right}
+		onconnect={(connections) => onConnectSource('a', connections)}
+		ondisconnect={(connections) => onDisconnectSource('a', connections)}
+		class="source-a"
+	/>
+	<Handle
+		id="b"
+		type="source"
+		position={Position.Right}
+		onconnect={(connections) => onConnectSource('b', connections)}
+		ondisconnect={(connections) => onDisconnectSource('b', connections)}
+		class="source-b"
+	/>
+</div>
+
+<style>
+	.custom {
+		background-color: #333;
+		padding: 10px;
+		border-radius: 10px;
+		color: #fff;
+	}
+
+	.custom :global(.source-a) {
+		top: 5px;
+		transform: translate(50%, 0);
+	}
+
+	.custom :global(.source-b) {
+		bottom: 5px;
+		top: auto;
+		transform: translate(50%, 0);
+	}
+</style>

examples/svelte/src/routes/examples/handle-connect/SingleHandleNode.svelte

@@ -0,0 +1,77 @@
+<script lang="ts">
+	import { Handle, Position, type NodeProps, type Connection } from '@xyflow/svelte';
+
+	type $$Props = NodeProps;
+
+	export let id: $$Props['id'];
+
+	function onConnectTarget(connection: Connection[]) {
+		console.log('connect target', connection);
+	}
+
+	function onConnectSource(connection: Connection[]) {
+		console.log('connect source', connection);
+	}
+
+	function onDisconnectTarget(connection: Connection[]) {
+		console.log('disconnect target', connection);
+	}
+
+	function onDisconnectSource(connection: Connection[]) {
+		console.log('disconnect source', connection);
+	}
+
+	export let data: $$Props['data'];
+	export let targetPosition: $$Props['targetPosition'] = Position.Top;
+	export let sourcePosition: $$Props['sourcePosition'] = Position.Bottom;
+	export let width: $$Props['width'] = undefined;
+	export let height: $$Props['height'] = undefined;
+	export let selected: $$Props['selected'] = undefined;
+	export let type: $$Props['type'] = undefined;
+	export let zIndex: $$Props['zIndex'] = undefined;
+	export let dragging: $$Props['dragging'] = false;
+	export let dragHandle: $$Props['dragHandle'] = undefined;
+	export let positionAbsolute: $$Props['positionAbsolute'] = {
+		x: 0,
+		y: 0
+	};
+	export let isConnectable: $$Props['isConnectable'] = undefined;
+
+	data;
+	targetPosition;
+	sourcePosition;
+	width;
+	height;
+	selected;
+	type;
+	zIndex;
+	dragging;
+	dragHandle;
+	positionAbsolute;
+	isConnectable;
+</script>
+
+<div class="custom">
+	<Handle
+		type="target"
+		position={Position.Left}
+		onconnect={onConnectTarget}
+		ondisconnect={onDisconnectTarget}
+	/>
+	<div>node {id}</div>
+	<Handle
+		type="source"
+		position={Position.Right}
+		onconnect={onConnectSource}
+		ondisconnect={onDisconnectSource}
+	/>
+</div>
+
+<style>
+	.custom {
+		background-color: #333;
+		padding: 10px;
+		border-radius: 10px;
+		color: #fff;
+	}
+</style>

examples/svelte/src/routes/examples/overview/+page.svelte

@@ -12,7 +12,8 @@
 		type EdgeTypes,
 		type Node,
 		type Edge,
-		ConnectionMode
+		ConnectionMode,
+		useSvelteFlow
 	} from '@xyflow/svelte';
 
 	import CustomNode from './CustomNode.svelte';
@@ -150,9 +151,9 @@
 	on:nodemouseenter={(event) => console.log('on node enter', event)}
 	on:nodemouseleave={(event) => console.log('on node leave', event)}
 	on:edgeclick={(event) => console.log('edge click', event)}
-	on:connectstart={(event) => console.log('on connect start', event)}
+	onconnectstart={(event) => console.log('on connect start', event)}
-	on:connect={(event) => console.log('on connect', event)}
+	onconnect={(event) => console.log('on connect', event)}
-	on:connectend={(event) => console.log('on connect end', event)}
+	onconnectend={(event) => console.log('on connect end', event)}
 	on:paneclick={(event) => console.log('on pane click', event)}
 	on:panecontextmenu={(event) => {
 		console.log('on pane contextmenu', event);

examples/svelte/src/routes/examples/usenodesdata/+page.svelte

@@ -0,0 +1,80 @@
+<script lang="ts">
+	import { writable } from 'svelte/store';
+	import {
+		SvelteFlow,
+		Controls,
+		Background,
+		BackgroundVariant,
+		MiniMap,
+		type Node,
+		type NodeTypes,
+		type Edge
+	} from '@xyflow/svelte';
+	import '@xyflow/svelte/dist/style.css';
+
+	import TextNode from './TextNode.svelte';
+	import UppercaseNode from './UppercaseNode.svelte';
+	import ResultNode from './ResultNode.svelte';
+
+	const nodeTypes: NodeTypes = {
+		text: TextNode,
+		uppercase: UppercaseNode,
+		result: ResultNode
+	};
+
+	const nodes = writable<Node[]>([
+		{
+			id: '1',
+			type: 'text',
+			data: {
+				text: 'hello'
+			},
+			position: { x: -100, y: -50 }
+		},
+		{
+			id: '1a',
+			type: 'uppercase',
+			data: {},
+			position: { x: 100, y: 0 }
+		},
+		{
+			id: '2',
+			type: 'text',
+			data: {
+				text: 'world'
+			},
+			position: { x: 0, y: 100 }
+		},
+
+		{
+			id: '3',
+			type: 'result',
+			data: {},
+			position: { x: 300, y: 50 }
+		}
+	]);
+
+	const edges = writable<Edge[]>([
+		{
+			id: 'e1-1a',
+			source: '1',
+			target: '1a'
+		},
+		{
+			id: 'e1a-3',
+			source: '1a',
+			target: '3'
+		},
+		{
+			id: 'e2-3',
+			source: '2',
+			target: '3'
+		}
+	]);
+</script>
+
+<SvelteFlow {nodes} {edges} {nodeTypes} fitView>
+	<Controls />
+	<Background variant={BackgroundVariant.Dots} />
+	<MiniMap />
+</SvelteFlow>

examples/svelte/src/routes/examples/usenodesdata/ResultNode.svelte

@@ -0,0 +1,37 @@
+<script lang="ts">
+	import {
+		Handle,
+		Position,
+		useHandleConnections,
+		useNodesData,
+		type NodeProps
+	} from '@xyflow/svelte';
+
+	type $$Props = NodeProps;
+
+	export let id: $$Props['id'];
+
+	const connections = useHandleConnections({
+		nodeId: id,
+		type: 'target'
+	});
+
+	$: nodeData = useNodesData($connections.map((connection) => connection.source));
+</script>
+
+<div class="custom">
+	<Handle type="target" position={Position.Left} />
+	<div>incoming texts:</div>
+
+	{#each $nodeData as data}
+		<div>{data.text}</div>
+	{/each}
+</div>
+
+<style>
+	.custom {
+		background-color: #eee;
+		padding: 10px;
+		border-radius: 10px;
+	}
+</style>

examples/svelte/src/routes/examples/usenodesdata/TextNode.svelte

@@ -0,0 +1,29 @@
+<script lang="ts">
+	import { Handle, Position, type NodeProps, useSvelteFlow } from '@xyflow/svelte';
+
+	type $$Props = NodeProps;
+
+	export let id: $$Props['id'];
+	export let data: $$Props['data'];
+
+	const { updateNodeData } = useSvelteFlow();
+</script>
+
+<div class="custom">
+	<div>node {id}</div>
+	<div>
+		<input
+			value={data.text}
+			on:input={(evt) => updateNodeData(id, { text: evt.currentTarget.value })}
+		/>
+	</div>
+	<Handle type="source" position={Position.Right} />
+</div>
+
+<style>
+	.custom {
+		background-color: #eee;
+		padding: 10px;
+		border-radius: 10px;
+	}
+</style>

examples/svelte/src/routes/examples/usenodesdata/UppercaseNode.svelte

@@ -0,0 +1,40 @@
+<script lang="ts">
+	import {
+		Handle,
+		Position,
+		useHandleConnections,
+		useNodesData,
+		useSvelteFlow,
+		type NodeProps
+	} from '@xyflow/svelte';
+
+	type $$Props = NodeProps;
+
+	export let id: $$Props['id'];
+
+	const { updateNodeData } = useSvelteFlow();
+	const connections = useHandleConnections({
+		nodeId: id,
+		type: 'target'
+	});
+
+	$: nodeData = useNodesData($connections[0]?.source);
+
+	$: {
+		updateNodeData(id, { text: $nodeData?.text?.toUpperCase() || '' });
+	}
+</script>
+
+<div class="custom">
+	<Handle type="target" position={Position.Left} isConnectable={$connections.length === 0} />
+	<div>uppercase transform</div>
+	<Handle type="source" position={Position.Right} />
+</div>
+
+<style>
+	.custom {
+		background-color: #eee;
+		padding: 10px;
+		border-radius: 10px;
+	}
+</style>

examples/svelte/src/routes/examples/useupdatenodeinternals/CustomNode.svelte

@@ -15,15 +15,9 @@
 	};
 </script>
 
-<Handle type="target" position={Position.Top} on:connect />
+<Handle type="target" position={Position.Top} />
 <button on:click={onClick}>add handle</button>
 
 {#each Array.from({ length: handleCount }) as handle, i}
-	<Handle
+	<Handle type="source" position={Position.Bottom} id={`${i}`} style={`left: ${i * 10}px;`} />
-		type="source"
-		position={Position.Bottom}
-		id={`${i}`}
-		style={`left: ${i * 10}px;`}
-		on:connect
-	/>
 {/each}

examples/svelte/src/routes/examples/useupdatenodeinternals/Flow.svelte

@@ -6,7 +6,9 @@
 		Background,
 		BackgroundVariant,
 		MiniMap,
-		type NodeTypes
+		type NodeTypes,
+		useSvelteFlow,
+		Panel
 	} from '@xyflow/svelte';
 
 	import CustomNode from './CustomNode.svelte';
@@ -50,6 +52,12 @@
 			target: '3'
 		}
 	]);
+
+	const { updateNode } = useSvelteFlow();
+
+	const updateNodePosition = () => {
+		updateNode('1', (node) => ({ position: { x: node.position.x + 10, y: node.position.y } }));
+	};
 </script>
 
 <main>
@@ -57,6 +65,8 @@
 		<Controls />
 		<Background variant={BackgroundVariant.Dots} />
 		<MiniMap />
+
+		<Panel><button on:click={updateNodePosition}>update node</button></Panel>
 	</SvelteFlow>
 </main>
 

packages/react/src/components/Handle/index.tsx

@@ -171,7 +171,7 @@ const Handle = forwardRef<HTMLDivElement, HandleComponentProps>(
         lib,
       });
 
-      if (isValid) {
+      if (isValid && connection) {
         onConnectExtended(connection);
       }
 

packages/react/src/hooks/useHandleConnections.ts

@@ -0,0 +1,54 @@
+import { useEffect, useMemo, useRef } from 'react';
+import { Connection, HandleType, areConnectionMapsEqual, handleConnectionChange } from '@xyflow/system';
+
+import { useStore } from './useStore';
+import { useNodeId } from '../contexts/NodeIdContext';
+
+type useHandleConnectionsParams = {
+  type: HandleType;
+  id?: string | null;
+  nodeId?: string;
+  onConnect?: (connections: Connection[]) => void;
+  onDisconnect?: (connections: Connection[]) => void;
+};
+
+/**
+ *  Hook to check if a <Handle /> is connected to another <Handle /> and get the connections.
+ *
+ * @public
+ * @param param.type - handle type 'source' or 'target'
+ * @param param.id - the handle id (this is only needed if the node has multiple handles of the same type)
+ * @param param.nodeId - node id - if not provided, the node id from the NodeIdContext is used
+ * @param param.onConnect - gets called when a connection is established
+ * @param param.onDisconnect - gets called when a connection is removed
+ * @returns an array with connections
+ */
+export function useHandleConnections({
+  type,
+  id = null,
+  nodeId,
+  onConnect,
+  onDisconnect,
+}: useHandleConnectionsParams): Connection[] {
+  const _nodeId = useNodeId();
+  const prevConnections = useRef<Map<string, Connection> | null>(null);
+  const currentNodeId = nodeId || _nodeId;
+
+  const connections = useStore(
+    (state) => state.connectionLookup.get(`${currentNodeId}-${type}-${id}`),
+    areConnectionMapsEqual
+  );
+
+  useEffect(() => {
+    // @todo dicuss if onConnect/onDisconnect should be called when the component mounts/unmounts
+    if (prevConnections.current && prevConnections.current !== connections) {
+      const _connections = connections ?? new Map();
+      handleConnectionChange(prevConnections.current, _connections, onDisconnect);
+      handleConnectionChange(_connections, prevConnections.current, onConnect);
+    }
+
+    prevConnections.current = connections ?? new Map();
+  }, [connections, onConnect, onDisconnect]);
+
+  return useMemo(() => Array.from(connections?.values() ?? []), [connections]);
+}

packages/react/src/hooks/useNodesData.ts

@@ -0,0 +1,40 @@
+import { useCallback } from 'react';
+import { shallow } from 'zustand/shallow';
+
+import { useStore } from '../hooks/useStore';
+import type { Node } from '../types';
+
+export function useNodesData<NodeType extends Node = Node>(nodeId: string): NodeType['data'] | null;
+export function useNodesData<NodeType extends Node = Node>(nodeIds: string[]): NodeType['data'][];
+export function useNodesData<NodeType extends Node = Node>(
+  nodeIds: string[],
+  guard: (node: Node) => node is NodeType
+): NodeType['data'][];
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+export function useNodesData(nodeIds: any): any {
+  const nodesData = useStore(
+    useCallback(
+      (s) => {
+        if (!Array.isArray(nodeIds)) {
+          return s.nodeLookup.get(nodeIds)?.data || null;
+        }
+
+        const data = [];
+
+        for (const nodeId of nodeIds) {
+          const nodeData = s.nodeLookup.get(nodeId)?.data;
+
+          if (nodeData) {
+            data.push(nodeData);
+          }
+        }
+
+        return data;
+      },
+      [nodeIds]
+    ),
+    shallow
+  );
+
+  return nodesData;
+}

packages/react/src/hooks/useReactFlow.ts

@@ -10,7 +10,7 @@ import {
 } from '@xyflow/system';
 
 import useViewportHelper from './useViewportHelper';
-import { useStoreApi } from '../hooks/useStore';
+import { useStoreApi } from './useStore';
 import type {
   ReactFlowInstance,
   Instance,
@@ -24,6 +24,7 @@ import type {
   Node,
   Edge,
 } from '../types';
+import { isNode } from '../utils';
 
 /* eslint-disable-next-line @typescript-eslint/no-explicit-any */
 export default function useReactFlow<NodeData = any, EdgeData = any>(): ReactFlowInstance<NodeData, EdgeData> {
@@ -271,6 +272,36 @@ export default function useReactFlow<NodeData = any, EdgeData = any>(): ReactFlo
     return getOutgoersBase(node, nodes, edges);
   }, []);
 
+  const updateNode = useCallback<Instance.UpdateNode>(
+    (id, nodeUpdate, options = { replace: true }) => {
+      setNodes((prevNodes) =>
+        prevNodes.map((node) => {
+          if (node.id === id) {
+            const nextNode = typeof nodeUpdate === 'function' ? nodeUpdate(node as Node) : nodeUpdate;
+            return options.replace && isNode(nextNode) ? nextNode : { ...node, ...nextNode };
+          }
+
+          return node;
+        })
+      );
+    },
+    [setNodes]
+  );
+
+  const updateNodeData = useCallback<Instance.UpdateNodeData>(
+    (id, dataUpdate, options = { replace: false }) => {
+      updateNode(
+        id,
+        (node) => {
+          const nextData = typeof dataUpdate === 'function' ? dataUpdate(node) : dataUpdate;
+          return options.replace ? { ...node, data: nextData } : { ...node, data: { ...node.data, ...nextData } };
+        },
+        options
+      );
+    },
+    [updateNode]
+  );
+
   return useMemo(() => {
     return {
       ...viewportHelper,
@@ -289,6 +320,8 @@ export default function useReactFlow<NodeData = any, EdgeData = any>(): ReactFlo
       getConnectedEdges,
       getIncomers,
       getOutgoers,
+      updateNode,
+      updateNodeData,
     };
   }, [
     viewportHelper,

packages/react/src/index.ts

@@ -1,5 +1,5 @@
 export { default as ReactFlow } from './container/ReactFlow';
-export { default as Handle } from './components/Handle';
+export { default as Handle, type HandleComponentProps } from './components/Handle';
 export { default as EdgeText } from './components/Edges/EdgeText';
 export { StraightEdge } from './components/Edges/StraightEdge';
 export { StepEdge } from './components/Edges/StepEdge';
@@ -22,6 +22,8 @@ export { useStore, useStoreApi } from './hooks/useStore';
 export { default as useOnViewportChange, type UseOnViewportChangeOptions } from './hooks/useOnViewportChange';
 export { default as useOnSelectionChange, type UseOnSelectionChangeOptions } from './hooks/useOnSelectionChange';
 export { default as useNodesInitialized, type UseNodesInitializedOptions } from './hooks/useNodesInitialized';
+export { useHandleConnections } from './hooks/useHandleConnections';
+export { useNodesData } from './hooks/useNodesData';
 export { useNodeId } from './contexts/NodeIdContext';
 
 export { applyNodeChanges, applyEdgeChanges, handleParentExpand } from './utils/changes';

packages/react/src/store/index.ts

@@ -7,6 +7,7 @@ import {
   panBy as panBySystem,
   Dimensions,
   updateNodeDimensions as updateNodeDimensionsSystem,
+  updateConnectionLookup,
 } from '@xyflow/system';
 
 import { applyNodeChanges, createSelectionChange, getSelectionChanges } from '../utils/changes';
@@ -49,8 +50,12 @@ const createRFStore = ({
         set({ nodes: nextNodes });
       },
       setEdges: (edges: Edge[]) => {
-        const { defaultEdgeOptions = {} } = get();
+        const { defaultEdgeOptions = {}, connectionLookup } = get();
-        set({ edges: edges.map((e) => ({ ...defaultEdgeOptions, ...e })) });
+        const nextEdges = edges.map((e) => ({ ...defaultEdgeOptions, ...e }));
+
+        updateConnectionLookup(connectionLookup, nextEdges);
+
+        set({ edges: nextEdges });
       },
       // when the user works with an uncontrolled flow,
       // we set a flag `hasDefaultNodes` / `hasDefaultEdges`
@@ -326,6 +331,7 @@ const createRFStore = ({
 
         set(currentConnection);
       },
+
       reset: () => {
         // @todo: what should we do about this? Do we still need it?
         // if you are on a SPA with multiple flows, we want to make sure that the store gets resetted

packages/react/src/store/initialState.ts

@@ -5,6 +5,7 @@ import {
   getNodesBounds,
   getViewportForBounds,
   Transform,
+  updateConnectionLookup,
 } from '@xyflow/system';
 
 import type { Edge, Node, ReactFlowStore } from '../types';
@@ -22,7 +23,8 @@ const getInitialState = ({
   height?: number;
   fitView?: boolean;
 } = {}): ReactFlowStore => {
-  const nodeLookup = new Map<string, Node>();
+  const nodeLookup = new Map();
+  const connectionLookup = updateConnectionLookup(new Map(), edges);
   const nextNodes = updateNodes(nodes, nodeLookup, { nodeOrigin: [0, 0], elevateNodesOnSelect: false });
 
   let transform: Transform = [0, 0, 1];
@@ -42,6 +44,7 @@ const getInitialState = ({
     nodes: nextNodes,
     nodeLookup,
     edges: edges,
+    connectionLookup,
     onNodesChange: null,
     onEdgesChange: null,
     hasDefaultNodes: false,

packages/react/src/types/instance.ts

@@ -45,6 +45,17 @@ export namespace Instance {
   export type getConnectedEdges = (id: string | (Node | { id: Node['id'] })[]) => Edge[];
   export type getIncomers = (node: string | Node | { id: Node['id'] }) => Node[];
   export type getOutgoers = (node: string | Node | { id: Node['id'] }) => Node[];
+
+  export type UpdateNode = (
+    id: string,
+    dataUpdate: Partial<Node> | ((node: Node) => Partial<Node>),
+    options?: { replace: boolean }
+  ) => void;
+  export type UpdateNodeData = (
+    id: string,
+    dataUpdate: object | ((node: Node) => object),
+    options?: { replace: boolean }
+  ) => void;
 }
 
 export type ReactFlowInstance<NodeData = any, EdgeData = any> = {
@@ -60,5 +71,7 @@ export type ReactFlowInstance<NodeData = any, EdgeData = any> = {
   deleteElements: Instance.DeleteElements;
   getIntersectingNodes: Instance.GetIntersectingNodes<NodeData>;
   isNodeIntersecting: Instance.IsNodeIntersecting<NodeData>;
+  updateNode: Instance.UpdateNode;
+  updateNodeData: Instance.UpdateNodeData;
   viewportInitialized: boolean;
 } & Omit<ViewportHelperFunctions, 'initialized'>;

packages/react/src/types/store.ts

@@ -24,6 +24,7 @@ import {
   type OnMoveEnd,
   type IsValidConnection,
   type UpdateConnection,
+  Connection,
 } from '@xyflow/system';
 
 import type {
@@ -49,6 +50,8 @@ export type ReactFlowStore = {
   nodes: Node[];
   nodeLookup: Map<string, Node>;
   edges: Edge[];
+  connectionLookup: Map<string, Map<string, Connection>>;
+
   onNodesChange: OnNodesChange | null;
   onEdgesChange: OnEdgesChange | null;
   hasDefaultNodes: boolean;

packages/react/src/utils/general.ts

@@ -10,8 +10,8 @@ import {
 
 import type { Edge, Node } from '../types';
 
-export const isNode = isNodeBase<Node, Edge>;
+export const isNode = isNodeBase<Node>;
-export const isEdge = isEdgeBase<Node, Edge>;
+export const isEdge = isEdgeBase<Edge>;
 export const getOutgoers = getOutgoersBase<Node, Edge>;
 export const getIncomers = getIncomersBase<Node, Edge>;
 export const addEdge = addEdgeBase<Edge>;

packages/svelte/package.json

@@ -41,7 +41,7 @@
     "access": "public"
   },
   "dependencies": {
-    "@svelte-put/shortcut": "^3.0.0",
+    "@svelte-put/shortcut": "^3.1.0",
     "@xyflow/system": "workspace:*",
     "classcat": "^5.0.4"
   },

packages/svelte/src/lib/components/Handle/Handle.svelte

@@ -1,17 +1,18 @@
 <script lang="ts">
-  import { getContext, createEventDispatcher } from 'svelte';
+  import { getContext } from 'svelte';
+  import type { Writable } from 'svelte/store';
   import cc from 'classcat';
   import {
     Position,
     XYHandle,
     isMouseEvent,
     type Connection,
-    type HandleType
+    areConnectionMapsEqual,
+    handleConnectionChange
   } from '@xyflow/system';
 
   import { useStore } from '$lib/store';
   import type { HandleComponentProps } from '$lib/types';
-  import type { Writable } from 'svelte/store';
 
   type $$Props = HandleComponentProps;
 
@@ -20,6 +21,8 @@
   export let position: $$Props['position'] = Position.Top;
   export let style: $$Props['style'] = undefined;
   export let isConnectable: $$Props['isConnectable'] = undefined;
+  export let onconnect: $$Props['onconnect'] = undefined;
+  export let ondisconnect: $$Props['ondisconnect'] = undefined;
   // export let isConnectableStart: $$Props['isConnectableStart'] = undefined;
   // export let isConnectableEnd: $$Props['isConnectableEnd'] = undefined;
 
@@ -32,18 +35,6 @@
   $: handleConnectable = isConnectable !== undefined ? isConnectable : $connectable;
 
   const handleId = id || null;
-  const dispatch = createEventDispatcher<{
-    connect: { connection: Connection };
-    connectstart: {
-      event: MouseEvent | TouchEvent;
-      nodeId: string | null;
-      handleId: string | null;
-      handleType: HandleType | null;
-    };
-    connectend: {
-      event: MouseEvent | TouchEvent;
-    };
-  }>();
 
   const store = useStore();
   const {
@@ -59,7 +50,12 @@
     panBy,
     cancelConnection,
     updateConnection,
-    autoPanOnConnect
+    autoPanOnConnect,
+    edges,
+    connectionLookup,
+    onconnect: onConnectAction,
+    onconnectstart: onConnectStartAction,
+    onconnectend: onConnectEndAction
   } = store;
 
   function onPointerDown(event: MouseEvent | TouchEvent) {
@@ -88,26 +84,43 @@
           }
 
           addEdge(edge);
-          // @todo: should we change/ improve the stuff we are passing here?
+          $onConnectAction?.(connection);
-          // instead of source/target we could pass fromNodeId, fromHandleId, etc
-          dispatch('connect', { connection });
         },
         onConnectStart: (event, startParams) => {
-          dispatch('connectstart', {
+          $onConnectStartAction?.(event, {
-            event,
             nodeId: startParams.nodeId,
             handleId: startParams.handleId,
             handleType: startParams.handleType
           });
         },
         onConnectEnd: (event) => {
-          dispatch('connectend', { event });
+          $onConnectEndAction?.(event);
         },
         getTransform: () => [$viewport.x, $viewport.y, $viewport.zoom]
       });
     }
   }
 
+  let prevConnections: Map<string, Connection> | null = null;
+  let connections: Map<string, Connection> | undefined;
+
+  $: if (onconnect || ondisconnect) {
+    // connectionLookup is not reactive, so we use edges to get notified about updates
+    $edges;
+    connections = $connectionLookup.get(`${nodeId}-${type}-${id || null}`);
+  }
+
+  $: {
+    if (prevConnections && !areConnectionMapsEqual(connections, prevConnections)) {
+      const _connections = connections ?? new Map();
+
+      handleConnectionChange(prevConnections, _connections, ondisconnect);
+      handleConnectionChange(_connections, prevConnections, onconnect);
+    }
+
+    prevConnections = connections ?? new Map();
+  }
+
   // @todo implement connectablestart, connectableend
 </script>
 

packages/svelte/src/lib/components/KeyHandler/KeyHandler.svelte

@@ -1,10 +1,10 @@
 <script lang="ts">
   import { shortcut, type ShortcutModifierDefinition } from '@svelte-put/shortcut';
+  import { isInputDOMNode, isMacOs } from '@xyflow/system';
 
   import { useStore } from '$lib/store';
   import type { KeyHandlerProps } from './types';
   import type { KeyDefinition, KeyDefinitionObject } from '$lib/types';
-  import { isMacOs } from '@xyflow/system';
 
   type $$Props = KeyHandlerProps;
 
@@ -23,7 +23,7 @@
   } = useStore();
 
   function isKeyObject(key?: KeyDefinition | null): key is KeyDefinitionObject {
-    return typeof key === 'object';
+    return key !== null && typeof key === 'object';
   }
 
   function getModifier(key?: KeyDefinition | null): ShortcutModifierDefinition {
@@ -71,16 +71,19 @@
     trigger: [
       {
         ...selectionKeyDefinition,
-        callback: () => selectionKeyDefinition.key && selectionKeyPressed.set(true)
+        enabled: selectionKeyDefinition.key !== null,
+        callback: () => selectionKeyPressed.set(true)
       }
     ],
+
     type: 'keydown'
   }}
   use:shortcut={{
     trigger: [
       {
         ...selectionKeyDefinition,
-        callback: () => selectionKeyDefinition.key && selectionKeyPressed.set(false)
+        enabled: selectionKeyDefinition.key !== null,
+        callback: () => selectionKeyPressed.set(false)
       }
     ],
     type: 'keyup'
@@ -89,7 +92,8 @@
     trigger: [
       {
         ...multiSelectionKeyDefinition,
-        callback: () => multiSelectionKeyDefinition.key && multiselectionKeyPressed.set(true)
+        enabled: multiSelectionKeyDefinition.key !== null,
+        callback: () => multiselectionKeyPressed.set(true)
       }
     ],
     type: 'keydown'
@@ -98,7 +102,8 @@
     trigger: [
       {
         ...multiSelectionKeyDefinition,
-        callback: () => multiSelectionKeyDefinition.key && multiselectionKeyPressed.set(false)
+        enabled: multiSelectionKeyDefinition.key !== null,
+        callback: () => multiselectionKeyPressed.set(false)
       }
     ],
     type: 'keyup'
@@ -107,7 +112,8 @@
     trigger: [
       {
         ...deleteKeyDefinition,
-        callback: () => deleteKeyDefinition.key && deleteKeyPressed.set(true)
+        enabled: deleteKeyDefinition.key !== null,
+        callback: (detail) => !isInputDOMNode(detail.originalEvent) && deleteKeyPressed.set(true)
       }
     ],
     type: 'keydown'
@@ -116,7 +122,8 @@
     trigger: [
       {
         ...deleteKeyDefinition,
-        callback: () => deleteKeyDefinition.key && deleteKeyPressed.set(false)
+        enabled: deleteKeyDefinition.key !== null,
+        callback: () => deleteKeyPressed.set(false)
       }
     ],
     type: 'keyup'
@@ -125,7 +132,8 @@
     trigger: [
       {
         ...panActivationKeyDefinition,
-        callback: () => panActivationKeyDefinition.key && panActivationKeyPressed.set(true)
+        enabled: panActivationKeyDefinition.key !== null,
+        callback: () => panActivationKeyPressed.set(true)
       }
     ],
     type: 'keydown'
@@ -134,7 +142,8 @@
     trigger: [
       {
         ...panActivationKeyDefinition,
-        callback: () => panActivationKeyDefinition.key && panActivationKeyPressed.set(false)
+        enabled: panActivationKeyDefinition.key !== null,
+        callback: () => panActivationKeyPressed.set(false)
       }
     ],
     type: 'keyup'
@@ -143,7 +152,8 @@
     trigger: [
       {
         ...zoomActivationKeyDefinition,
-        callback: () => zoomActivationKeyDefinition.key && zoomActivationKeyPressed.set(true)
+        enabled: zoomActivationKeyDefinition.key !== null,
+        callback: () => zoomActivationKeyPressed.set(true)
       }
     ],
     type: 'keydown'
@@ -152,7 +162,8 @@
     trigger: [
       {
         ...zoomActivationKeyDefinition,
-        callback: () => zoomActivationKeyDefinition.key && zoomActivationKeyPressed.set(false)
+        enabled: zoomActivationKeyDefinition.key !== null,
+        callback: () => zoomActivationKeyPressed.set(false)
       }
     ],
     type: 'keyup'

packages/svelte/src/lib/components/NodeWrapper/NodeWrapper.svelte

@@ -194,9 +194,6 @@
       positionAbsolute={{ x: positionX, y: positionY }}
       {width}
       {height}
-      on:connectstart
-      on:connect
-      on:connectend
     />
   </div>
 {/if}

packages/svelte/src/lib/components/nodes/DefaultNode.svelte

@@ -37,6 +37,6 @@
   isConnectable;
 </script>
 
-<Handle type="target" position={targetPosition} on:connectstart on:connect on:connectend />
+<Handle type="target" position={targetPosition} />
 {data?.label}
-<Handle type="source" position={sourcePosition} on:connectstart on:connect on:connectend />
+<Handle type="source" position={sourcePosition} />

packages/svelte/src/lib/components/nodes/InputNode.svelte

@@ -39,4 +39,4 @@
 </script>
 
 {data?.label}
-<Handle type="source" position={sourcePosition} on:connectstart on:connect on:connectend />
+<Handle type="source" position={sourcePosition} />

packages/svelte/src/lib/components/nodes/OutputNode.svelte

@@ -36,4 +36,4 @@
 </script>
 
 {data?.label}
-<Handle type="target" position={targetPosition} on:connectstart on:connect on:connectend />
+<Handle type="target" position={targetPosition} />

packages/svelte/src/lib/container/NodeRenderer/NodeRenderer.svelte

@@ -83,9 +83,6 @@
       on:nodemouseenter
       on:nodemousemove
       on:nodemouseleave
-      on:connectstart
-      on:connect
-      on:connectend
       on:nodedrag
       on:nodedragstart
       on:nodedragstop

packages/svelte/src/lib/container/SvelteFlow/SvelteFlow.svelte

@@ -78,6 +78,9 @@
   export let width: $$Props['width'] = undefined;
   export let height: $$Props['height'] = undefined;
   export let colorMode: $$Props['colorMode'] = 'light';
+  export let onconnect: $$Props['onconnect'] = undefined;
+  export let onconnectstart: $$Props['onconnectstart'] = undefined;
+  export let onconnectend: $$Props['onconnectend'] = undefined;
 
   export let defaultMarkerColor = '#b1b1b7';
 
@@ -152,7 +155,10 @@
       ondelete,
       onedgecreate,
       connectionMode,
-      nodeDragThreshold
+      nodeDragThreshold,
+      onconnect,
+      onconnectstart,
+      onconnectend
     };
 
     updateStoreByKeys(store, updatableProps);
@@ -217,9 +223,6 @@
           on:nodemouseenter
           on:nodemousemove
           on:nodemouseleave
-          on:connectstart
-          on:connect
-          on:connectend
           on:nodedragstart
           on:nodedrag
           on:nodedragstop

packages/svelte/src/lib/container/SvelteFlow/types.ts

@@ -15,7 +15,10 @@ import type {
   ConnectionMode,
   PanelPosition,
   ProOptions,
-  ColorMode
+  ColorMode,
+  OnConnect,
+  OnConnectStart,
+  OnConnectEnd
 } from '@xyflow/system';
 
 import type {
@@ -92,4 +95,8 @@ export type SvelteFlowProps = DOMAttributes<HTMLDivElement> & {
   ondelete?: OnDelete;
 
   onedgecreate?: OnEdgeCreate;
+
+  onconnect?: OnConnect;
+  onconnectstart?: OnConnectStart;
+  onconnectend?: OnConnectEnd;
 };

packages/svelte/src/lib/container/SvelteFlow/utils.ts

@@ -66,6 +66,9 @@ export type UpdatableStoreProps = {
   ondelete?: UnwrapWritable<SvelteFlowStore['ondelete']>;
   onedgecreate?: UnwrapWritable<SvelteFlowStore['onedgecreate']>;
   nodeDragThreshold?: UnwrapWritable<SvelteFlowStore['nodeDragThreshold']>;
+  onconnect?: UnwrapWritable<SvelteFlowStore['onconnect']>;
+  onconnectstart?: UnwrapWritable<SvelteFlowStore['onconnectstart']>;
+  onconnectend?: UnwrapWritable<SvelteFlowStore['onconnectend']>;
 };
 
 export function updateStoreByKeys(store: SvelteFlowStore, keys: UpdatableStoreProps) {

packages/svelte/src/lib/hooks/useHandleConnections.ts

@@ -0,0 +1,30 @@
+import { derived } from 'svelte/store';
+import { areConnectionMapsEqual, type Connection, type HandleType } from '@xyflow/system';
+
+import { useStore } from '$lib/store';
+
+export type useHandleConnectionsParams = {
+  nodeId: string;
+  type: HandleType;
+  id?: string | null;
+};
+
+const initialConnections: Connection[] = [];
+
+export function useHandleConnections({ nodeId, type, id = null }: useHandleConnectionsParams) {
+  const { edges, connectionLookup } = useStore();
+  let prevConnections: Map<string, Connection> | undefined = undefined;
+
+  return derived(
+    [edges, connectionLookup],
+    ([, connectionLookup], set) => {
+      const nextConnections = connectionLookup.get(`${nodeId}-${type}-${id || null}`);
+
+      if (!areConnectionMapsEqual(nextConnections, prevConnections)) {
+        prevConnections = nextConnections;
+        set(Array.from(prevConnections?.values() || []));
+      }
+    },
+    initialConnections
+  );
+}

packages/svelte/src/lib/hooks/useNodesData.ts

@@ -0,0 +1,64 @@
+import { derived, type Readable } from 'svelte/store';
+
+import type { Node } from '$lib/types';
+import { useStore } from '$lib/store';
+
+function areNodesDataEqual(a: Node['data'][] | null, b: Node['data'][] | null) {
+  if ((!a && !b) || (!a?.length && !b?.length)) {
+    true;
+  }
+
+  if (!a || !b || a.length !== b.length) {
+    return false;
+  }
+
+  for (let i = 0; i < a.length; i++) {
+    if (a[i] !== b[i]) {
+      return false;
+    }
+  }
+
+  return true;
+}
+
+export function useNodesData<NodeType extends Node = Node>(
+  nodeId: string
+): Readable<NodeType['data'] | null>;
+export function useNodesData<NodeType extends Node = Node>(
+  nodeIds: string[]
+): Readable<NodeType['data'][]>;
+export function useNodesData<NodeType extends Node = Node>(
+  nodeIds: string[],
+  guard: (node: Node) => node is NodeType
+): Readable<NodeType['data'][]>;
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+export function useNodesData(nodeIds: any): any {
+  const { nodes, nodeLookup } = useStore();
+  let prevNodesData: (Node['data'] | null)[] | null = null;
+
+  return derived([nodes, nodeLookup], ([, nodeLookup], set) => {
+    let nextNodesData: (Node['data'] | null)[] | null = null;
+    const nodeIdArray = Array.isArray(nodeIds);
+
+    if (!nodeIdArray) {
+      nextNodesData = [nodeLookup.get(nodeIds)?.data || null];
+    } else {
+      const data = [];
+
+      for (const nodeId of nodeIds) {
+        const nodeData = nodeLookup.get(nodeId)?.data;
+
+        if (nodeData) {
+          data.push(nodeData);
+        }
+      }
+
+      nextNodesData = data;
+    }
+
+    if (!areNodesDataEqual(nextNodesData, prevNodesData)) {
+      prevNodesData = nextNodesData;
+      set(nodeIdArray ? nextNodesData : nextNodesData[0]);
+    }
+  });
+}

packages/svelte/src/lib/hooks/useSvelteFlow.ts

@@ -1,7 +1,5 @@
 import { get, type Writable } from 'svelte/store';
 import {
-  getIncomersBase,
-  getOutgoersBase,
   getOverlappingArea,
   isRectObject,
   nodeToRect,
@@ -20,6 +18,7 @@ import {
 
 import { useStore } from '$lib/store';
 import type { Edge, FitViewOptions, Node } from '$lib/types';
+import { isNode } from '$lib/utils';
 
 export function useSvelteFlow(): {
   zoomIn: ZoomInOut;
@@ -48,9 +47,16 @@ export function useSvelteFlow(): {
   screenToFlowPosition: (position: XYPosition) => XYPosition;
   flowToScreenPosition: (position: XYPosition) => XYPosition;
   viewport: Writable<Viewport>;
-  getConnectedEdges: (id: string | (Node | { id: Node['id'] })[]) => Edge[];
+  updateNode: (
-  getIncomers: (node: string | Node | { id: Node['id'] }) => Node[];
+    id: string,
-  getOutgoers: (node: string | Node | { id: Node['id'] }) => Node[];
+    nodeUpdate: Partial<Node> | ((node: Node) => Partial<Node>),
+    options?: { replace: boolean }
+  ) => void;
+  updateNodeData: (
+    id: string,
+    dataUpdate: object | ((node: Node) => object),
+    options?: { replace: boolean }
+  ) => void;
   toObject: () => { nodes: Node[]; edges: Edge[]; viewport: Viewport };
 } {
   const {
@@ -84,6 +90,24 @@ export function useSvelteFlow(): {
     return [nodeRect, node, isRect];
   };
 
+  const updateNode = (
+    id: string,
+    nodeUpdate: Partial<Node> | ((node: Node) => Partial<Node>),
+    options: { replace: boolean } = { replace: false }
+  ) => {
+    nodes.update((nds) =>
+      nds.map((node) => {
+        if (node.id === id) {
+          const nextNode = typeof nodeUpdate === 'function' ? nodeUpdate(node as Node) : nodeUpdate;
+
+          return options.replace && isNode(nextNode) ? nextNode : { ...node, ...nextNode };
+        }
+
+        return node;
+      })
+    );
+  };
+
   return {
     zoomIn,
     zoomOut,
@@ -232,29 +256,6 @@ export function useSvelteFlow(): {
         y: rendererPosition.y + domY
       };
     },
-    getConnectedEdges: (node) => {
-      const nodeIds = new Set();
-
-      if (typeof node === 'string') {
-        nodeIds.add(node);
-      } else if (node.length >= 1) {
-        node.forEach((n) => {
-          nodeIds.add(n.id);
-        });
-      }
-
-      return get(edges).filter((edge) => nodeIds.has(edge.source) || nodeIds.has(edge.target));
-    },
-    getIncomers: (node) => {
-      const _node = typeof node === 'string' ? { id: node } : node;
-
-      return getIncomersBase(_node, get(nodes), get(edges));
-    },
-    getOutgoers: (node) => {
-      const _node = typeof node === 'string' ? { id: node } : node;
-
-      return getOutgoersBase(_node, get(nodes), get(edges));
-    },
     toObject: () => {
       return {
         nodes: get(nodes).map((node) => ({
@@ -268,6 +269,16 @@ export function useSvelteFlow(): {
         viewport: { ...get(viewport) }
       };
     },
+    updateNode,
+    updateNodeData: (id, dataUpdate, options) => {
+      updateNode(id, (node) => {
+        const nextData = typeof dataUpdate === 'function' ? dataUpdate(node) : dataUpdate;
+
+        return options?.replace
+          ? { ...node, data: nextData }
+          : { ...node, data: { ...node.data, ...nextData } };
+      });
+    },
     viewport
   };
 }

packages/svelte/src/lib/index.ts

@@ -27,6 +27,8 @@ export * from '$lib/hooks/useSvelteFlow';
 export * from '$lib/hooks/useUpdateNodeInternals';
 export * from '$lib/hooks/useConnection';
 export * from '$lib/hooks/useNodesEdges';
+export * from '$lib/hooks/useHandleConnections';
+export * from '$lib/hooks/useNodesData';
 
 // types
 export type {

packages/svelte/src/lib/store/initial-store.ts

@@ -17,7 +17,12 @@ import {
   type Viewport,
   updateNodes,
   getNodesBounds,
-  getViewportForBounds
+  getViewportForBounds,
+  updateConnectionLookup,
+  type ConnectionLookup,
+  type OnConnect,
+  type OnConnectStart,
+  type OnConnectEnd
 } from '@xyflow/system';
 
 import DefaultNode from '$lib/components/nodes/DefaultNode.svelte';
@@ -72,11 +77,12 @@ export const getInitialStore = ({
   height?: number;
   fitView?: boolean;
 }) => {
-  const nodeLookup = new Map<string, Node>();
+  const nodeLookup = new Map();
   const nextNodes = updateNodes(nodes, nodeLookup, {
     nodeOrigin: [0, 0],
     elevateNodesOnSelect: false
   });
+  const connectionLookup = updateConnectionLookup(new Map(), edges);
 
   let viewport: Viewport = { x: 0, y: 0, zoom: 1 };
 
@@ -91,8 +97,9 @@ export const getInitialStore = ({
     nodes: createNodesStore(nextNodes, nodeLookup),
     nodeLookup: readable<Map<string, Node>>(nodeLookup),
     visibleNodes: readable<Node[]>([]),
-    edges: createEdgesStore(edges),
+    edges: createEdgesStore(edges, connectionLookup),
     edgeTree: readable<GroupedEdges<EdgeLayouted>[]>([]),
+    connectionLookup: readable<ConnectionLookup>(connectionLookup),
     height: writable<number>(500),
     width: writable<number>(500),
     minZoom: writable<number>(0.5),
@@ -136,6 +143,9 @@ export const getInitialStore = ({
     onlyRenderVisibleElements: writable<boolean>(false),
     onerror: writable<OnError>(devWarn),
     ondelete: writable<OnDelete>(undefined),
-    onedgecreate: writable<OnEdgeCreate>(undefined)
+    onedgecreate: writable<OnEdgeCreate>(undefined),
+    onconnect: writable<OnConnect>(undefined),
+    onconnectstart: writable<OnConnectStart>(undefined),
+    onconnectend: writable<OnConnectEnd>(undefined)
   };
 };

packages/svelte/src/lib/store/utils.ts

@@ -6,7 +6,13 @@ import {
   type Writable,
   get
 } from 'svelte/store';
-import { updateNodes, type Viewport, type PanZoomInstance } from '@xyflow/system';
+import {
+  updateNodes,
+  type Viewport,
+  type PanZoomInstance,
+  type ConnectionLookup,
+  updateConnectionLookup
+} from '@xyflow/system';
 
 import type { DefaultEdgeOptions, DefaultNodeOptions, Edge, Node } from '$lib/types';
 
@@ -168,6 +174,7 @@ export const createNodesStore = (
 
 export const createEdgesStore = (
   edges: Edge[],
+  connectionLookup: ConnectionLookup,
   defaultOptions?: DefaultEdgeOptions
 ): Writable<Edge[]> & { setDefaultOptions: (opts: DefaultEdgeOptions) => void } => {
   const { subscribe, set, update } = writable<Edge[]>([]);
@@ -176,6 +183,9 @@ export const createEdgesStore = (
 
   const _set: typeof set = (eds: Edge[]) => {
     const nextEdges = defaults ? eds.map((edge) => ({ ...defaults, ...edge })) : eds;
+
+    updateConnectionLookup(connectionLookup, nextEdges);
+
     value = nextEdges;
     set(value);
   };

packages/svelte/src/lib/types/general.ts

@@ -31,6 +31,8 @@ export type HandleComponentProps = {
   isConnectable?: boolean;
   isConnectableStart?: boolean;
   isConnectableEnd?: boolean;
+  onconnect?: (connections: Connection[]) => void;
+  ondisconnect?: (connections: Connection[]) => void;
 };
 
 export type FitViewOptions = FitViewOptionsBase<Node>;

packages/svelte/src/lib/utils/index.ts

@@ -10,8 +10,8 @@ import {
 
 import type { Edge, Node } from '$lib/types';
 
-export const isNode = isNodeBase<Node, Edge>;
+export const isNode = isNodeBase<Node>;
-export const isEdge = isEdgeBase<Node, Edge>;
+export const isEdge = isEdgeBase<Edge>;
 export const getOutgoers = getOutgoersBase<Node, Edge>;
 export const getIncomers = getIncomersBase<Node, Edge>;
 export const addEdge = addEdgeBase<Edge>;

packages/system/src/types/general.ts

@@ -22,8 +22,8 @@ export type SetCenter = (x: number, y: number, options?: SetCenterOptions) => vo
 export type FitBounds = (bounds: Rect, options?: FitBoundsOptions) => void;
 
 export type Connection = {
-  source: string | null;
+  source: string;
-  target: string | null;
+  target: string;
   sourceHandle: string | null;
   targetHandle: string | null;
 };
@@ -139,3 +139,5 @@ export type UpdateConnection = (params: {
 
 export type ColorModeClass = 'light' | 'dark';
 export type ColorMode = ColorModeClass | 'system';
+
+export type ConnectionLookup = Map<string, Map<string, Connection>>;

packages/system/src/utils/connections.ts

@@ -0,0 +1,53 @@
+import { Connection } from '../types';
+
+/**
+ * @internal
+ */
+export function areConnectionMapsEqual(a?: Map<string, Connection>, b?: Map<string, Connection>) {
+  if (!a && !b) {
+    return true;
+  }
+
+  if (!a || !b || a.size !== b.size) {
+    return false;
+  }
+
+  if (!a.size && !b.size) {
+    return true;
+  }
+
+  for (const key of a.keys()) {
+    if (!b.has(key)) {
+      return false;
+    }
+  }
+
+  return true;
+}
+
+/**
+ * We call the callback for all connections in a that are not in b
+ *
+ * @internal
+ */
+export function handleConnectionChange(
+  a: Map<string, Connection>,
+  b: Map<string, Connection>,
+  cb?: (diff: Connection[]) => void
+) {
+  if (!cb) {
+    return;
+  }
+
+  const diff: Connection[] = [];
+
+  a.forEach((connection, key) => {
+    if (!b?.has(key)) {
+      diff.push(connection);
+    }
+  });
+
+  if (diff.length) {
+    cb(diff);
+  }
+}

packages/system/src/utils/graph.ts

@@ -11,7 +11,6 @@ import {
   getViewportForBounds,
 } from './general';
 import {
-  type Connection,
   type Transform,
   type XYPosition,
   type Rect,
@@ -26,13 +25,11 @@ import {
 } from '../types';
 import { errorMessages } from '../constants';
 
-export const isEdgeBase = <NodeType extends NodeBase = NodeBase, EdgeType extends EdgeBase = EdgeBase>(
+export const isEdgeBase = <EdgeType extends EdgeBase = EdgeBase>(element: any): element is EdgeType =>
-  element: NodeType | Connection | EdgeType
+  'id' in element && 'source' in element && 'target' in element;
-): element is EdgeType => 'id' in element && 'source' in element && 'target' in element;
 
-export const isNodeBase = <NodeType extends NodeBase = NodeBase, EdgeType extends EdgeBase = EdgeBase>(
+export const isNodeBase = <NodeType extends NodeBase = NodeBase>(element: any): element is NodeType =>
-  element: NodeType | Connection | EdgeType
+  'id' in element && !('source' in element) && !('target' in element);
-): element is NodeType => 'id' in element && !('source' in element) && !('target' in element);
 
 export const getOutgoersBase = <NodeType extends NodeBase = NodeBase, EdgeType extends EdgeBase = EdgeBase>(
   node: NodeType | { id: string },

packages/system/src/utils/index.ts

@@ -1,3 +1,4 @@
+export * from './connections';
 export * from './dom';
 export * from './edges';
 export * from './graph';

packages/system/src/utils/store.ts

@@ -9,6 +9,8 @@ import {
   Transform,
   XYPosition,
   XYZPosition,
+  ConnectionLookup,
+  EdgeBase,
 } from '../types';
 import { getDimensions, getHandleBounds } from './dom';
 import { isNumeric } from './general';
@@ -71,11 +73,13 @@ export function updateNodes<NodeType extends NodeBase>(
     defaults: {},
   }
 ): NodeType[] {
+  const tmpLookup = new Map(nodeLookup);
+  nodeLookup.clear();
   const parentNodes: ParentNodes = {};
   const selectedNodeZ: number = options?.elevateNodesOnSelect ? 1000 : 0;
 
   const nextNodes = nodes.map((n) => {
-    const currentStoreNode = nodeLookup.get(n.id);
+    const currentStoreNode = tmpLookup.get(n.id);
     const node: NodeType = {
       ...options.defaults,
       ...n,
@@ -233,3 +237,23 @@ export function panBy({
 
   return transformChanged;
 }
+
+export function updateConnectionLookup(lookup: ConnectionLookup, edges: EdgeBase[]) {
+  lookup.clear();
+
+  edges.forEach(({ source, target, sourceHandle = null, targetHandle = null }) => {
+    if (source && target) {
+      const sourceKey = `${source}-source-${sourceHandle}`;
+      const targetKey = `${target}-target-${targetHandle}`;
+
+      const prevSource = lookup.get(sourceKey) || new Map();
+      const prevTarget = lookup.get(targetKey) || new Map();
+      const connection = { source, target, sourceHandle, targetHandle };
+
+      lookup.set(sourceKey, prevSource.set(`${target}-${targetHandle}`, connection));
+      lookup.set(targetKey, prevTarget.set(`${source}-${sourceHandle}`, connection));
+    }
+  });
+
+  return lookup;
+}

packages/system/src/xyhandle/XYHandle.ts

@@ -58,12 +58,10 @@ export type XYHandleInstance = {
 type Result = {
   handleDomNode: Element | null;
   isValid: boolean;
-  connection: Connection;
+  connection: Connection | null;
   endHandle: ConnectingHandle | null;
 };
 
-const nullConnection: Connection = { source: null, target: null, sourceHandle: null, targetHandle: null };
-
 const alwaysValid = () => true;
 
 let connectionStartHandle: ConnectingHandle | null = null;
@@ -197,7 +195,7 @@ function onPointerDown(
       return resetRecentHandle(prevActiveHandle, lib);
     }
 
-    if (connection.source !== connection.target && handleDomNode) {
+    if (connection?.source !== connection?.target && handleDomNode) {
       resetRecentHandle(prevActiveHandle, lib);
       prevActiveHandle = handleDomNode;
       handleDomNode.classList.add('connecting', `${lib}-flow__handle-connecting`);
@@ -269,7 +267,7 @@ function isValidHandle(
   const result: Result = {
     handleDomNode: handleToCheck,
     isValid: false,
-    connection: nullConnection,
+    connection: null,
     endHandle: null,
   };
 
@@ -280,6 +278,10 @@ function isValidHandle(
     const connectable = handleToCheck.classList.contains('connectable');
     const connectableEnd = handleToCheck.classList.contains('connectableend');
 
+    if (!handleNodeId) {
+      return result;
+    }
+
     const connection: Connection = {
       source: isTarget ? handleNodeId : fromNodeId,
       sourceHandle: isTarget ? handleId : fromHandleId,

pnpm-lock.yaml

@@ -61,10 +61,10 @@ importers:
     dependencies:
       '@astrojs/react':
         specifier: ^3.0.2
-        version: registry.npmjs.org/@astrojs/react@3.0.2(@types/react-dom@18.2.8)(@types/react@18.2.24)(react-dom@18.2.0)(react@18.2.0)(vite@4.5.0)
+        version: registry.npmjs.org/@astrojs/react@3.0.2(@types/react-dom@18.2.8)(@types/react@18.2.24)(react-dom@18.2.0)(react@18.2.0)(vite@4.5.1)
       '@astrojs/svelte':
         specifier: ^4.0.2
-        version: registry.npmjs.org/@astrojs/svelte@4.0.2(astro@3.2.2)(svelte@4.2.1)(typescript@5.2.2)(vite@4.5.0)
+        version: registry.npmjs.org/@astrojs/svelte@4.0.2(astro@3.2.2)(svelte@4.2.1)(typescript@5.3.3)(vite@4.5.1)
       '@types/react':
         specifier: ^18.2.24
         version: registry.npmjs.org/@types/react@18.2.24
@@ -291,8 +291,8 @@ importers:
   packages/svelte:
     dependencies:
       '@svelte-put/shortcut':
-        specifier: ^3.0.0
+        specifier: ^3.1.0
-        version: registry.npmjs.org/@svelte-put/shortcut@3.0.0
+        version: registry.npmjs.org/@svelte-put/shortcut@3.1.0
       '@xyflow/system':
         specifier: workspace:*
         version: link:../system
@@ -305,7 +305,7 @@ importers:
         version: registry.npmjs.org/@sveltejs/adapter-auto@2.1.0(@sveltejs/kit@1.22.6)
       '@sveltejs/kit':
         specifier: ^1.22.6
-        version: registry.npmjs.org/@sveltejs/kit@1.22.6(svelte@4.2.1)(vite@4.5.0)
+        version: registry.npmjs.org/@sveltejs/kit@1.22.6(svelte@4.2.1)(vite@4.5.1)
       '@sveltejs/package':
         specifier: ^2.2.1
         version: registry.npmjs.org/@sveltejs/package@2.2.1(svelte@4.2.1)(typescript@5.1.3)
@@ -417,7 +417,7 @@ importers:
     dependencies:
       '@playwright/experimental-ct-react':
         specifier: ^1.39.0
-        version: registry.npmjs.org/@playwright/experimental-ct-react@1.39.0(@types/node@18.7.16)(vite@4.5.0)
+        version: registry.npmjs.org/@playwright/experimental-ct-react@1.39.0(@types/node@18.7.16)(vite@4.5.1)
       '@types/react':
         specifier: ^18.2.31
         version: registry.npmjs.org/@types/react@18.2.31
@@ -551,7 +551,7 @@ packages:
       prismjs: registry.npmjs.org/prismjs@1.29.0
     dev: false
 
-  registry.npmjs.org/@astrojs/react@3.0.2(@types/react-dom@18.2.8)(@types/react@18.2.24)(react-dom@18.2.0)(react@18.2.0)(vite@4.5.0):
+  registry.npmjs.org/@astrojs/react@3.0.2(@types/react-dom@18.2.8)(@types/react@18.2.24)(react-dom@18.2.0)(react@18.2.0)(vite@4.5.1):
     resolution: {integrity: sha512-aooNIuQxTg+IWGMZPuIEwBeBi4/TCPCMsr3714zuLjAjukVd5ZrX/bCNxJqDWU4HNwUm4XFU1OhcEvYOHa5uMQ==, registry: https://registry.npmjs.com/, tarball: https://registry.npmjs.org/@astrojs/react/-/react-3.0.2.tgz}
     id: registry.npmjs.org/@astrojs/react/3.0.2
     name: '@astrojs/react'
@@ -565,7 +565,7 @@ packages:
     dependencies:
       '@types/react': registry.npmjs.org/@types/react@18.2.24
       '@types/react-dom': registry.npmjs.org/@types/react-dom@18.2.8
-      '@vitejs/plugin-react': registry.npmjs.org/@vitejs/plugin-react@4.1.1(vite@4.5.0)
+      '@vitejs/plugin-react': registry.npmjs.org/@vitejs/plugin-react@4.1.1(vite@4.5.1)
       react: registry.npmjs.org/react@18.2.0
       react-dom: registry.npmjs.org/react-dom@18.2.0(react@18.2.0)
       ultrahtml: registry.npmjs.org/ultrahtml@1.5.2
@@ -574,7 +574,7 @@ packages:
       - vite
     dev: false
 
-  registry.npmjs.org/@astrojs/svelte@4.0.2(astro@3.2.2)(svelte@4.2.1)(typescript@5.2.2)(vite@4.5.0):
+  registry.npmjs.org/@astrojs/svelte@4.0.2(astro@3.2.2)(svelte@4.2.1)(typescript@5.3.3)(vite@4.5.1):
     resolution: {integrity: sha512-XB9Sexq+iW5aUpctDk6zuKHbWIAuPlAnZKbfgaS9VOaOUtx1t12crP9YoKEVcTifXYgoRuWWfeEAm2I8pYlLIQ==, registry: https://registry.npmjs.com/, tarball: https://registry.npmjs.org/@astrojs/svelte/-/svelte-4.0.2.tgz}
     id: registry.npmjs.org/@astrojs/svelte/4.0.2
     name: '@astrojs/svelte'
@@ -584,10 +584,10 @@ packages:
       astro: ^3.0.11
       svelte: ^3.55.0 || ^4.0.0
     dependencies:
-      '@sveltejs/vite-plugin-svelte': registry.npmjs.org/@sveltejs/vite-plugin-svelte@2.4.6(svelte@4.2.1)(vite@4.5.0)
+      '@sveltejs/vite-plugin-svelte': registry.npmjs.org/@sveltejs/vite-plugin-svelte@2.4.6(svelte@4.2.1)(vite@4.5.1)
       astro: registry.npmjs.org/astro@3.2.2
       svelte: registry.npmjs.org/svelte@4.2.1
-      svelte2tsx: registry.npmjs.org/svelte2tsx@0.6.23(svelte@4.2.1)(typescript@5.2.2)
+      svelte2tsx: registry.npmjs.org/svelte2tsx@0.6.23(svelte@4.2.1)(typescript@5.3.3)
     transitivePeerDependencies:
       - supports-color
       - typescript
@@ -1938,7 +1938,7 @@ packages:
       - terser
     dev: false
 
-  registry.npmjs.org/@playwright/experimental-ct-react@1.39.0(@types/node@18.7.16)(vite@4.5.0):
+  registry.npmjs.org/@playwright/experimental-ct-react@1.39.0(@types/node@18.7.16)(vite@4.5.1):
     resolution: {integrity: sha512-6GaDVVo6x8P9Jdw3yPbVaEP59nesRsETn3kznHAy+2493VsP3IaVATat2G28z0Sivf/K9Tkh5xRYjiawN0ebgw==, registry: https://registry.npmjs.com/, tarball: https://registry.npmjs.org/@playwright/experimental-ct-react/-/experimental-ct-react-1.39.0.tgz}
     id: registry.npmjs.org/@playwright/experimental-ct-react/1.39.0
     name: '@playwright/experimental-ct-react'
@@ -1947,7 +1947,7 @@ packages:
     hasBin: true
     dependencies:
       '@playwright/experimental-ct-core': registry.npmjs.org/@playwright/experimental-ct-core@1.39.0(@types/node@18.7.16)
-      '@vitejs/plugin-react': registry.npmjs.org/@vitejs/plugin-react@4.1.1(vite@4.5.0)
+      '@vitejs/plugin-react': registry.npmjs.org/@vitejs/plugin-react@4.1.1(vite@4.5.1)
     transitivePeerDependencies:
       - '@types/node'
       - less
@@ -2120,10 +2120,10 @@ packages:
     version: 2.0.0
     dev: true
 
-  registry.npmjs.org/@svelte-put/shortcut@3.0.0:
+  registry.npmjs.org/@svelte-put/shortcut@3.1.0:
-    resolution: {integrity: sha512-nZg3pwpTi9wUsvQPlqOzEsxZcF2jmY5j+VBq/20IUjjd2OpM92XqZAga0PCCjE6OuEobOt58UMnC2QZgOvk0tQ==, registry: https://registry.npmjs.com/, tarball: https://registry.npmjs.org/@svelte-put/shortcut/-/shortcut-3.0.0.tgz}
+    resolution: {integrity: sha512-EWMEDkZ0+O3yMhb9yrqe5UYisV9CNRKX6Pl/JW3x62t74CiN+3COu1L9NzZUG0omagc2Z3J14PZNYxs77IC9NA==, registry: https://registry.npmjs.com/, tarball: https://registry.npmjs.org/@svelte-put/shortcut/-/shortcut-3.1.0.tgz}
     name: '@svelte-put/shortcut'
-    version: 3.0.0
+    version: 3.1.0
     dev: false
 
   registry.npmjs.org/@sveltejs/adapter-auto@2.1.0(@sveltejs/kit@1.22.6):
@@ -2134,7 +2134,7 @@ packages:
     peerDependencies:
       '@sveltejs/kit': ^1.0.0
     dependencies:
-      '@sveltejs/kit': registry.npmjs.org/@sveltejs/kit@1.22.6(svelte@4.2.1)(vite@4.5.0)
+      '@sveltejs/kit': registry.npmjs.org/@sveltejs/kit@1.22.6(svelte@4.2.1)(vite@4.5.1)
       import-meta-resolve: registry.npmjs.org/import-meta-resolve@3.0.0
     dev: true
 
@@ -2150,7 +2150,7 @@ packages:
       import-meta-resolve: registry.npmjs.org/import-meta-resolve@4.0.0
     dev: true
 
-  registry.npmjs.org/@sveltejs/kit@1.22.6(svelte@4.2.1)(vite@4.5.0):
+  registry.npmjs.org/@sveltejs/kit@1.22.6(svelte@4.2.1)(vite@4.5.1):
     resolution: {integrity: sha512-SDKxI/QpsReCwIn5czjT53fKlPBybbmMk67d317gUqfeORroBAFN1Z6s/x0E1JYi+04i7kKllS+Sz9wVfmUkAQ==, registry: https://registry.npmjs.com/, tarball: https://registry.npmjs.org/@sveltejs/kit/-/kit-1.22.6.tgz}
     id: registry.npmjs.org/@sveltejs/kit/1.22.6
     name: '@sveltejs/kit'
@@ -2162,7 +2162,7 @@ packages:
       svelte: ^3.54.0 || ^4.0.0-next.0
       vite: ^4.0.0
     dependencies:
-      '@sveltejs/vite-plugin-svelte': registry.npmjs.org/@sveltejs/vite-plugin-svelte@2.4.6(svelte@4.2.1)(vite@4.5.0)
+      '@sveltejs/vite-plugin-svelte': registry.npmjs.org/@sveltejs/vite-plugin-svelte@2.4.6(svelte@4.2.1)(vite@4.5.1)
       '@types/cookie': registry.npmjs.org/@types/cookie@0.5.3
       cookie: registry.npmjs.org/cookie@0.5.0
       devalue: registry.npmjs.org/devalue@4.3.2
@@ -2175,7 +2175,7 @@ packages:
       sirv: registry.npmjs.org/sirv@2.0.3
       svelte: registry.npmjs.org/svelte@4.2.1
       undici: registry.npmjs.org/undici@5.23.0
-      vite: registry.npmjs.org/vite@4.5.0(@types/node@18.7.16)
+      vite: registry.npmjs.org/vite@4.5.1(@types/node@18.7.16)
     transitivePeerDependencies:
       - supports-color
     dev: true
@@ -2231,7 +2231,7 @@ packages:
       - typescript
     dev: true
 
-  registry.npmjs.org/@sveltejs/vite-plugin-svelte-inspector@1.0.4(@sveltejs/vite-plugin-svelte@2.4.6)(svelte@4.2.1)(vite@4.5.0):
+  registry.npmjs.org/@sveltejs/vite-plugin-svelte-inspector@1.0.4(@sveltejs/vite-plugin-svelte@2.4.6)(svelte@4.2.1)(vite@4.5.1):
     resolution: {integrity: sha512-zjiuZ3yydBtwpF3bj0kQNV0YXe+iKE545QGZVTaylW3eAzFr+pJ/cwK8lZEaRp4JtaJXhD5DyWAV4AxLh6DgaQ==, registry: https://registry.npmjs.com/, tarball: https://registry.npmjs.org/@sveltejs/vite-plugin-svelte-inspector/-/vite-plugin-svelte-inspector-1.0.4.tgz}
     id: registry.npmjs.org/@sveltejs/vite-plugin-svelte-inspector/1.0.4
     name: '@sveltejs/vite-plugin-svelte-inspector'
@@ -2242,10 +2242,10 @@ packages:
       svelte: ^3.54.0 || ^4.0.0
       vite: ^4.0.0
     dependencies:
-      '@sveltejs/vite-plugin-svelte': registry.npmjs.org/@sveltejs/vite-plugin-svelte@2.4.6(svelte@4.2.1)(vite@4.5.0)
+      '@sveltejs/vite-plugin-svelte': registry.npmjs.org/@sveltejs/vite-plugin-svelte@2.4.6(svelte@4.2.1)(vite@4.5.1)
       debug: registry.npmjs.org/debug@4.3.4(supports-color@8.1.1)
       svelte: registry.npmjs.org/svelte@4.2.1
-      vite: registry.npmjs.org/vite@4.5.0(@types/node@18.7.16)
+      vite: registry.npmjs.org/vite@4.5.1(@types/node@18.7.16)
     transitivePeerDependencies:
       - supports-color
 
@@ -2268,7 +2268,7 @@ packages:
       - supports-color
     dev: true
 
-  registry.npmjs.org/@sveltejs/vite-plugin-svelte@2.4.6(svelte@4.2.1)(vite@4.5.0):
+  registry.npmjs.org/@sveltejs/vite-plugin-svelte@2.4.6(svelte@4.2.1)(vite@4.5.1):
     resolution: {integrity: sha512-zO79p0+DZnXPnF0ltIigWDx/ux7Ni+HRaFOw720Qeivc1azFUrJxTl0OryXVibYNx1hCboGia1NRV3x8RNv4cA==, registry: https://registry.npmjs.com/, tarball: https://registry.npmjs.org/@sveltejs/vite-plugin-svelte/-/vite-plugin-svelte-2.4.6.tgz}
     id: registry.npmjs.org/@sveltejs/vite-plugin-svelte/2.4.6
     name: '@sveltejs/vite-plugin-svelte'
@@ -2278,15 +2278,15 @@ packages:
       svelte: ^3.54.0 || ^4.0.0
       vite: ^4.0.0
     dependencies:
-      '@sveltejs/vite-plugin-svelte-inspector': registry.npmjs.org/@sveltejs/vite-plugin-svelte-inspector@1.0.4(@sveltejs/vite-plugin-svelte@2.4.6)(svelte@4.2.1)(vite@4.5.0)
+      '@sveltejs/vite-plugin-svelte-inspector': registry.npmjs.org/@sveltejs/vite-plugin-svelte-inspector@1.0.4(@sveltejs/vite-plugin-svelte@2.4.6)(svelte@4.2.1)(vite@4.5.1)
       debug: registry.npmjs.org/debug@4.3.4(supports-color@8.1.1)
       deepmerge: registry.npmjs.org/deepmerge@4.3.1
       kleur: registry.npmjs.org/kleur@4.1.5
       magic-string: registry.npmjs.org/magic-string@0.30.5
       svelte: registry.npmjs.org/svelte@4.2.1
       svelte-hmr: registry.npmjs.org/svelte-hmr@0.15.3(svelte@4.2.1)
-      vite: registry.npmjs.org/vite@4.5.0(@types/node@18.7.16)
+      vite: registry.npmjs.org/vite@4.5.1(@types/node@18.7.16)
-      vitefu: registry.npmjs.org/vitefu@0.2.5(vite@4.5.0)
+      vitefu: registry.npmjs.org/vitefu@0.2.5(vite@4.5.1)
     transitivePeerDependencies:
       - supports-color
 
@@ -2972,6 +2972,12 @@ packages:
     version: 7.5.4
     dev: true
 
+  registry.npmjs.org/@types/semver@7.5.6:
+    resolution: {integrity: sha512-dn1l8LaMea/IjDoHNd9J52uBbInB796CDffS6VdIxvqYCPSG0V0DzHp76GpaWnlhg88uYyPbXCDIowa86ybd5A==, registry: https://registry.npmjs.com/, tarball: https://registry.npmjs.org/@types/semver/-/semver-7.5.6.tgz}
+    name: '@types/semver'
+    version: 7.5.6
+    dev: true
+
   registry.npmjs.org/@types/sinonjs__fake-timers@8.1.1:
     resolution: {integrity: sha512-0kSuKjAS0TrGLJ0M/+8MaFkGsQhZpB6pxOmvS3K8FYI72K//YmdfoW9X2qPsAKh1mkwxGD5zib9s1FIFed6E8g==, registry: https://registry.npmjs.com/, tarball: https://registry.npmjs.org/@types/sinonjs__fake-timers/-/sinonjs__fake-timers-8.1.1.tgz}
     name: '@types/sinonjs__fake-timers'
@@ -2996,10 +3002,10 @@ packages:
     version: 3.0.1
     dev: false
 
-  registry.npmjs.org/@types/yauzl@2.10.2:
+  registry.npmjs.org/@types/yauzl@2.10.3:
-    resolution: {integrity: sha512-Km7XAtUIduROw7QPgvcft0lIupeG8a8rdKL8RiSyKvlE7dYY31fEn41HVuQsRFDuROA8tA4K2UVL+WdfFmErBA==, registry: https://registry.npmjs.com/, tarball: https://registry.npmjs.org/@types/yauzl/-/yauzl-2.10.2.tgz}
+    resolution: {integrity: sha512-oJoftv0LSuaDZE3Le4DbKX+KS9G36NzOeSap90UIK0yMA/NhKJhqlSGtNDORNRaIbQfzjXDrQa0ytJ6mNRGz/Q==, registry: https://registry.npmjs.com/, tarball: https://registry.npmjs.org/@types/yauzl/-/yauzl-2.10.3.tgz}
     name: '@types/yauzl'
-    version: 2.10.2
+    version: 2.10.3
     requiresBuild: true
     dependencies:
       '@types/node': registry.npmjs.org/@types/node@18.7.16
@@ -3092,7 +3098,7 @@ packages:
       debug: registry.npmjs.org/debug@4.3.4(supports-color@8.1.1)
       eslint: registry.npmjs.org/eslint@8.43.0
       graphemer: registry.npmjs.org/graphemer@1.4.0
-      ignore: registry.npmjs.org/ignore@5.2.4
+      ignore: registry.npmjs.org/ignore@5.3.0
       natural-compare: registry.npmjs.org/natural-compare@1.4.0
       semver: registry.npmjs.org/semver@7.5.4
       ts-api-utils: registry.npmjs.org/ts-api-utils@1.0.3(typescript@5.1.3)
@@ -3398,7 +3404,7 @@ packages:
     dependencies:
       '@eslint-community/eslint-utils': registry.npmjs.org/@eslint-community/eslint-utils@4.4.0(eslint@8.53.0)
       '@types/json-schema': registry.npmjs.org/@types/json-schema@7.0.15
-      '@types/semver': registry.npmjs.org/@types/semver@7.5.4
+      '@types/semver': registry.npmjs.org/@types/semver@7.5.6
       '@typescript-eslint/scope-manager': registry.npmjs.org/@typescript-eslint/scope-manager@6.10.0
       '@typescript-eslint/types': registry.npmjs.org/@typescript-eslint/types@6.10.0
       '@typescript-eslint/typescript-estree': registry.npmjs.org/@typescript-eslint/typescript-estree@6.10.0(typescript@5.2.2)
@@ -3420,7 +3426,7 @@ packages:
     dependencies:
       '@eslint-community/eslint-utils': registry.npmjs.org/@eslint-community/eslint-utils@4.4.0(eslint@8.43.0)
       '@types/json-schema': registry.npmjs.org/@types/json-schema@7.0.15
-      '@types/semver': registry.npmjs.org/@types/semver@7.5.4
+      '@types/semver': registry.npmjs.org/@types/semver@7.5.6
       '@typescript-eslint/scope-manager': registry.npmjs.org/@typescript-eslint/scope-manager@6.8.0
       '@typescript-eslint/types': registry.npmjs.org/@typescript-eslint/types@6.8.0
       '@typescript-eslint/typescript-estree': registry.npmjs.org/@typescript-eslint/typescript-estree@6.8.0(typescript@5.1.3)
@@ -3498,6 +3504,26 @@ packages:
       vite: registry.npmjs.org/vite@4.5.0(@types/node@18.7.16)
     transitivePeerDependencies:
       - supports-color
+    dev: true
+
+  registry.npmjs.org/@vitejs/plugin-react@4.1.1(vite@4.5.1):
+    resolution: {integrity: sha512-Jie2HERK+uh27e+ORXXwEP5h0Y2lS9T2PRGbfebiHGlwzDO0dEnd2aNtOR/qjBlPb1YgxwAONeblL1xqLikLag==, registry: https://registry.npmjs.com/, tarball: https://registry.npmjs.org/@vitejs/plugin-react/-/plugin-react-4.1.1.tgz}
+    id: registry.npmjs.org/@vitejs/plugin-react/4.1.1
+    name: '@vitejs/plugin-react'
+    version: 4.1.1
+    engines: {node: ^14.18.0 || >=16.0.0}
+    peerDependencies:
+      vite: ^4.2.0
+    dependencies:
+      '@babel/core': registry.npmjs.org/@babel/core@7.23.2
+      '@babel/plugin-transform-react-jsx-self': registry.npmjs.org/@babel/plugin-transform-react-jsx-self@7.22.5(@babel/core@7.23.2)
+      '@babel/plugin-transform-react-jsx-source': registry.npmjs.org/@babel/plugin-transform-react-jsx-source@7.22.5(@babel/core@7.23.2)
+      '@types/babel__core': registry.npmjs.org/@types/babel__core@7.20.4
+      react-refresh: registry.npmjs.org/react-refresh@0.14.0
+      vite: registry.npmjs.org/vite@4.5.1(@types/node@18.7.16)
+    transitivePeerDependencies:
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       object-keys: registry.npmjs.org/object-keys@1.1.1
-      object.assign: registry.npmjs.org/object.assign@4.1.4
+      object.assign: registry.npmjs.org/object.assign@4.1.5
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       safe-array-concat: registry.npmjs.org/safe-array-concat@1.0.1
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     optionalDependencies:
-      '@types/yauzl': registry.npmjs.org/@types/yauzl@2.10.2
+      '@types/yauzl': registry.npmjs.org/@types/yauzl@2.10.3
     transitivePeerDependencies:
       - supports-color
     dev: true
@@ -6487,7 +6513,7 @@ packages:
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       fast-glob: registry.npmjs.org/fast-glob@3.3.2
-      ignore: registry.npmjs.org/ignore@5.2.4
+      ignore: registry.npmjs.org/ignore@5.3.0
       merge2: registry.npmjs.org/merge2@1.4.1
       slash: registry.npmjs.org/slash@3.0.0
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       fast-glob: registry.npmjs.org/fast-glob@3.3.2
-      ignore: registry.npmjs.org/ignore@5.2.4
+      ignore: registry.npmjs.org/ignore@5.3.0
       merge2: registry.npmjs.org/merge2@1.4.1
       slash: registry.npmjs.org/slash@4.0.0
     dev: true
@@ -6791,6 +6817,13 @@ packages:
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+  registry.npmjs.org/ignore@5.3.0:
+    resolution: {integrity: sha512-g7dmpshy+gD7mh88OC9NwSGTKoc3kyLAZQRU1mt53Aw/vnvfXnbC+F/7F7QoYVKbV+KNvJx8wArewKy1vXMtlg==, registry: https://registry.npmjs.com/, tarball: https://registry.npmjs.org/ignore/-/ignore-5.3.0.tgz}
+    name: ignore
+    version: 5.3.0
+    engines: {node: '>= 4'}
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+
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@@ -7431,7 +7464,7 @@ packages:
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       array.prototype.flat: registry.npmjs.org/array.prototype.flat@1.3.2
-      object.assign: registry.npmjs.org/object.assign@4.1.4
+      object.assign: registry.npmjs.org/object.assign@4.1.5
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@@ -8560,10 +8593,10 @@ packages:
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-  registry.npmjs.org/object.assign@4.1.4:
+  registry.npmjs.org/object.assign@4.1.5:
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+    resolution: {integrity: sha512-byy+U7gp+FVwmyzKPYhW2h5l3crpmGsxl7X2s8y43IgxvG4g3QZ6CffDtsNQy1WsmZpQbO+ybo0AlW7TY6DcBQ==, registry: https://registry.npmjs.com/, tarball: https://registry.npmjs.org/object.assign/-/object.assign-4.1.5.tgz}
     name: object.assign
-    version: 4.1.4
+    version: 4.1.5
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@@ -9487,6 +9520,16 @@ packages:
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       source-map-js: registry.npmjs.org/source-map-js@1.0.2
 
+  registry.npmjs.org/postcss@8.4.32:
+    resolution: {integrity: sha512-D/kj5JNu6oo2EIy+XL/26JEDTlIbB8hw85G8StOE6L74RQAVVP5rej6wxCNqyMbR4RkPfqvezVbPw81Ngd6Kcw==, registry: https://registry.npmjs.com/, tarball: https://registry.npmjs.org/postcss/-/postcss-8.4.32.tgz}
+    name: postcss
+    version: 8.4.32
+    engines: {node: ^10 || ^12 || >=14}
+    dependencies:
+      nanoid: registry.npmjs.org/nanoid@3.3.7
+      picocolors: registry.npmjs.org/picocolors@1.0.0
+      source-map-js: registry.npmjs.org/source-map-js@1.0.2
+
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@@ -11206,7 +11249,7 @@ packages:
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     dev: true
 
-  registry.npmjs.org/svelte2tsx@0.6.23(svelte@4.2.1)(typescript@5.2.2):
+  registry.npmjs.org/svelte2tsx@0.6.23(svelte@4.2.1)(typescript@5.3.3):
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@@ -11218,7 +11261,7 @@ packages:
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       svelte: registry.npmjs.org/svelte@4.2.1
-      typescript: registry.npmjs.org/typescript@5.2.2
+      typescript: registry.npmjs.org/typescript@5.3.3
     dev: false
 
   registry.npmjs.org/svelte@4.2.1:
@@ -11755,6 +11798,14 @@ packages:
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     hasBin: true
 
+  registry.npmjs.org/typescript@5.3.3:
+    resolution: {integrity: sha512-pXWcraxM0uxAS+tN0AG/BF2TyqmHO014Z070UsJ+pFvYuRSq8KH8DmWpnbXe0pEPDHXZV3FcAbJkijJ5oNEnWw==, registry: https://registry.npmjs.com/, tarball: https://registry.npmjs.org/typescript/-/typescript-5.3.3.tgz}
+    name: typescript
+    version: 5.3.3
+    engines: {node: '>=14.17'}
+    hasBin: true
+    dev: false
+
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     resolution: {integrity: sha512-qh4mBffhlkiXwDAOxvSGxhL0QEQsTbnP9BozOK3OYPEGvPvdWzvAUaXNtUSMdNsKDtuyjEbyVUPFZ52SSLhLqw==, registry: https://registry.npmjs.com/, tarball: https://registry.npmjs.org/ultrahtml/-/ultrahtml-1.5.2.tgz}
     name: ultrahtml
@@ -12090,6 +12141,44 @@ packages:
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+  registry.npmjs.org/vite@4.5.1(@types/node@18.7.16):
+    resolution: {integrity: sha512-AXXFaAJ8yebyqzoNB9fu2pHoo/nWX+xZlaRwoeYUxEqBO+Zj4msE5G+BhGBll9lYEKv9Hfks52PAF2X7qDYXQA==, registry: https://registry.npmjs.com/, tarball: https://registry.npmjs.org/vite/-/vite-4.5.1.tgz}
+    id: registry.npmjs.org/vite/4.5.1
+    name: vite
+    version: 4.5.1
+    engines: {node: ^14.18.0 || >=16.0.0}
+    hasBin: true
+    peerDependencies:
+      '@types/node': '>= 14'
+      less: '*'
+      lightningcss: ^1.21.0
+      sass: '*'
+      stylus: '*'
+      sugarss: '*'
+      terser: ^5.4.0
+    peerDependenciesMeta:
+      '@types/node':
+        optional: true
+      less:
+        optional: true
+      lightningcss:
+        optional: true
+      sass:
+        optional: true
+      stylus:
+        optional: true
+      sugarss:
+        optional: true
+      terser:
+        optional: true
+    dependencies:
+      '@types/node': registry.npmjs.org/@types/node@18.7.16
+      esbuild: registry.npmjs.org/esbuild@0.18.20
+      postcss: registry.npmjs.org/postcss@8.4.32
+      rollup: registry.npmjs.org/rollup@3.29.4
+    optionalDependencies:
+      fsevents: registry.npmjs.org/fsevents@2.3.3
+
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@@ -12103,6 +12192,19 @@ packages:
     dependencies:
       vite: registry.npmjs.org/vite@4.5.0(@types/node@18.7.16)
 
+  registry.npmjs.org/vitefu@0.2.5(vite@4.5.1):
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+    id: registry.npmjs.org/vitefu/0.2.5
+    name: vitefu
+    version: 0.2.5
+    peerDependencies:
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+    peerDependenciesMeta:
+      vite:
+        optional: true
+    dependencies:
+      vite: registry.npmjs.org/vite@4.5.1(@types/node@18.7.16)
+
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     name: vscode-oniguruma