feat(svelte): add updateNodeInternals

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

@@ -1,46 +1,47 @@
 <script lang="ts">
-  import { goto } from '$app/navigation';
-  import { page } from '$app/stores';
+	import { goto } from '$app/navigation';
+	import { page } from '$app/stores';
 
-  const routes = [
-    'customnode',
-    'drag-n-drop',
-    'edges',
-    'figma',
-    'interaction',
-    'overview',
-    'stress',
-    'subflows',
-    'usesvelteflow',
-    'validation'
-  ];
+	const routes = [
+		'customnode',
+		'drag-n-drop',
+		'edges',
+		'figma',
+		'interaction',
+		'overview',
+		'stress',
+		'subflows',
+		'usesvelteflow',
+		'useupdatenodeinternals',
+		'validation'
+	];
 
-  const onChange = (event: Event) => {
-    const route = (event.target as HTMLSelectElement).value;
-    goto(route);
-  };
+	const onChange = (event: Event) => {
+		const route = (event.target as HTMLSelectElement).value;
+		goto(route);
+	};
 </script>
 
 <header>
-  <div class="logo">Svelte Flow</div>
-  <select on:change={onChange} value={$page.route.id}>
-    {#each routes as route}
-      <option value={`/${route}`}>{route}</option>
-    {/each}
-  </select>
+	<div class="logo">Svelte Flow</div>
+	<select on:change={onChange} value={$page.route.id}>
+		{#each routes as route}
+			<option value={`/${route}`}>{route}</option>
+		{/each}
+	</select>
 </header>
 
 <style>
-  header {
-    padding: 10px;
-    border-bottom: 1px solid #eee;
-    display: flex;
-    font-weight: 700;
-    align-items: center;
-    color: #111;
-  }
+	header {
+		padding: 10px;
+		border-bottom: 1px solid #eee;
+		display: flex;
+		font-weight: 700;
+		align-items: center;
+		color: #111;
+	}
 
-  .logo {
-    margin-right: 1rem;
-  }
+	.logo {
+		margin-right: 1rem;
+	}
 </style>

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

@@ -0,0 +1,9 @@
+<script lang="ts">
+	import { SvelteFlowProvider } from '@xyflow/svelte';
+
+	import Flow from './Flow.svelte';
+</script>
+
+<SvelteFlowProvider>
+	<Flow />
+</SvelteFlowProvider>

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

@@ -0,0 +1,29 @@
+<script lang="ts">
+	import { Handle, Position, type NodeProps, useUpdateNodeInternals } from '@xyflow/svelte';
+
+	type $$Props = NodeProps;
+
+	export let id: $$Props['id'];
+
+	const updateNodeInternals = useUpdateNodeInternals();
+
+	$: handleCount = 1;
+
+	const onClick = () => {
+		handleCount += 1;
+		updateNodeInternals(id);
+	};
+</script>
+
+<Handle type="target" position={Position.Top} on:connect />
+<button on:click={onClick}>add handle</button>
+
+{#each Array.from({ length: handleCount }) as handle, i}
+	<Handle
+		type="source"
+		position={Position.Bottom}
+		id={`${i}`}
+		style={`left: ${i * 10}px;`}
+		on:connect
+	/>
+{/each}

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

@@ -0,0 +1,68 @@
+<script lang="ts">
+	import { writable } from 'svelte/store';
+	import {
+		SvelteFlow,
+		Controls,
+		Background,
+		BackgroundVariant,
+		MiniMap,
+		type NodeTypes
+	} from '@xyflow/svelte';
+
+	import CustomNode from './CustomNode.svelte';
+
+	import '@xyflow/svelte/dist/style.css';
+
+	const nodeTypes: NodeTypes = {
+		custom: CustomNode
+	};
+
+	const nodes = writable([
+		{
+			id: '1',
+			type: 'custom',
+			data: { label: 'Input Node' },
+			position: { x: 150, y: 0 }
+		},
+		{
+			id: '2',
+			type: 'default',
+			data: { label: 'Node' },
+			position: { x: 0, y: 150 }
+		},
+		{
+			id: '3',
+			type: 'output',
+			data: { label: 'Output Node' },
+			position: { x: 300, y: 150 }
+		}
+	]);
+
+	const edges = writable([
+		{
+			id: '1-2',
+			source: '1',
+			target: '2'
+		},
+		{
+			id: '1-3',
+			source: '1',
+			target: '3'
+		}
+	]);
+</script>
+
+<main>
+	<SvelteFlow {nodes} {edges} {nodeTypes} fitView>
+		<Controls />
+		<Background variant={BackgroundVariant.Dots} />
+		<MiniMap />
+	</SvelteFlow>
+</main>
+
+<style>
+	main {
+		height: 100%;
+		display: flex;
+	}
+</style>

packages/svelte/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@xyflow/svelte",
-  "version": "0.0.18",
+  "version": "0.0.19",
   "description": "Svelte Flow - A highly customizable Svelte library for building node-based editors, workflow systems, diagrams and more.",
   "keywords": [
     "svelte",

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

@@ -27,7 +27,6 @@ export function useSvelteFlow(): {
   nodes: SvelteFlowStore['nodes'];
   edges: SvelteFlowStore['edges'];
 } {
-  // how to get the new context here? fit view doesn't work, because the store is not updated (uses old nodes store)
   const {
     zoomIn,
     zoomOut,

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

@@ -0,0 +1,28 @@
+import { get } from 'svelte/store';
+import type { UpdateNodeInternals, NodeDimensionUpdate } from '@xyflow/system';
+
+import { useStore } from '$lib/store';
+
+export function useUpdateNodeInternals(): UpdateNodeInternals {
+  const { domNode, updateNodeDimensions } = useStore();
+
+  // @todo: do we want to add this to system?
+  const updateInternals = (id: string | string[]) => {
+    const updateIds = Array.isArray(id) ? id : [id];
+    const updates = updateIds.reduce<NodeDimensionUpdate[]>((res, updateId) => {
+      const nodeElement = get(domNode)?.querySelector(
+        `.svelte-flow__node[data-id="${updateId}"]`
+      ) as HTMLDivElement;
+
+      if (nodeElement) {
+        res.push({ id: updateId, nodeElement, forceUpdate: true });
+      }
+
+      return res;
+    }, []);
+
+    requestAnimationFrame(() => updateNodeDimensions(updates));
+  };
+
+  return updateInternals;
+}

packages/svelte/src/lib/index.ts

@@ -20,6 +20,7 @@ export { useStore } from '$lib/store';
 // utils
 export * from '$lib/utils';
 export * from '$lib/hooks/useSvelteFlow';
+export * from '$lib/hooks/useUpdateNodeInternals';
 
 // types
 export type { Edge, EdgeProps, EdgeTypes, DefaultEdgeOptions } from '$lib/types/edges';