Merge pull request #3537 from wbkd/use-svelte-flow-to-object

feat(svelte) added toObject() on useSvelteFlow

examples/svelte/src/routes/usesvelteflow/Sidebar.svelte

@@ -1,5 +1,5 @@
 <script lang="ts">
-	import { useSvelteFlow } from '@xyflow/svelte';
+	import { useNodes, useSvelteFlow } from '@xyflow/svelte';
 
 	const {
 		zoomIn,
@@ -10,8 +10,10 @@
 		setViewport,
 		getViewport,
 		viewport,
-		nodes
+		toObject
 	} = useSvelteFlow();
+
+	const nodes = useNodes();
 </script>
 
 <aside>
@@ -23,6 +25,12 @@
 	<button on:click={() => setCenter(0, 0)}>setCenter 0, 0</button>
 	<button on:click={() => setViewport({ x: 100, y: 100, zoom: 2 })}>setViewport</button>
 	<button on:click={() => console.log(getViewport())}>getViewport</button>
+	<button
+		on:click={() => {
+			const { nodes, edges, viewport } = toObject();
+			console.log(nodes, edges, viewport);
+		}}>toObject</button
+	>
 
 	<div class="label">Nodes:</div>
 	{#each $nodes as node (node.id)}

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

@@ -51,6 +51,7 @@ export function useSvelteFlow(): {
   getConnectedEdges: (id: string | (Partial<Node> & { id: Node['id'] })[]) => Edge[];
   getIncomers: (node: string | (Partial<Node> & { id: Node['id'] })) => Node[];
   getOutgoers: (node: string | (Partial<Node> & { id: Node['id'] })) => Node[];
+  toObject: () => { nodes: Node[]; edges: Edge[]; viewport: Viewport };
 } {
   const {
     zoomIn,
@@ -263,6 +264,19 @@ export function useSvelteFlow(): {
 
       return getOutgoersBase(_node, get(nodes), get(edges));
     },
+    toObject: () => {
+      return {
+        nodes: get(nodes).map((node) => ({
+          ...node,
+          // we want to make sure that changes to the nodes object that gets returned by toObject
+          // do not affect the nodes object
+          position: { ...node.position },
+          data: { ...node.data }
+        })),
+        edges: get(edges).map((edge) => ({ ...edge })),
+        viewport: { ...get(viewport) }
+      };
+    },
     viewport
   };
 }