update absolute positions before initial fitView

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

@@ -19,7 +19,8 @@ import {
   type UpdateConnection,
   type ConnectionState,
   type NodeOrigin,
-  getFitViewNodes
+  getFitViewNodes,
+  updateAbsolutePositions
 } from '@xyflow/system';
 
 import type { EdgeTypes, NodeTypes, Node, Edge, FitViewOptions } from '$lib/types';
@@ -96,6 +97,7 @@ export function createStore({
 
   function updateNodeInternals(updates: Map<string, InternalNodeUpdate>) {
     const nodeLookup = get(store.nodeLookup);
+    const parentLookup = get(store.parentLookup);
     const { changes, updatedInternals } = updateNodeInternalsSystem(
       updates,
       nodeLookup,
@@ -108,6 +110,8 @@ export function createStore({
       return;
     }
 
+    updateAbsolutePositions(nodeLookup, parentLookup, { nodeOrigin, nodeExtent });
+
     if (!get(store.fitViewOnInitDone) && get(store.fitViewOnInit)) {
       const fitViewOptions = get(store.fitViewOptions);
       const fitViewOnInitDone = fitViewSync({

packages/system/src/utils/store.ts

@@ -61,11 +61,14 @@ export function updateAbsolutePositions<NodeType extends NodeBase>(
 ) {
   const _options = mergeObjects(defaultOptions, options);
   for (const node of nodeLookup.values()) {
-    if (!node.parentId) {
-      continue;
+    if (node.parentId) {
+      updateChildNode(node, nodeLookup, parentLookup, _options);
+    } else {
+      const positionWithOrigin = getNodePositionWithOrigin(node, _options.nodeOrigin);
+      const extent = isCoordinateExtent(node.extent) ? node.extent : _options.nodeExtent;
+      const clampedPosition = clampPosition(positionWithOrigin, extent, getNodeDimensions(node));
+      node.internals.positionAbsolute = clampedPosition;
     }
-
-    updateChildNode(node, nodeLookup, parentLookup, _options);
   }
 }