getNodes & getEdges can be called without specifying ids

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

@@ -30,9 +30,9 @@ export function useSvelteFlow(): {
   zoomIn: ZoomInOut;
   zoomOut: ZoomInOut;
   getNode: (id: string) => Node | undefined;
-  getNodes: (ids: string[]) => (Node | undefined)[];
+  getNodes: (ids?: string[]) => (Node | undefined)[];
   getEdge: (id: string) => Edge | undefined;
-  getEdges: (ids: string[]) => (Edge | undefined)[];
+  getEdges: (ids?: string[]) => (Edge | undefined)[];
   setZoom: (zoomLevel: number, options?: ViewportHelperFunctionOptions) => void;
   getZoom: () => number;
   setCenter: (x: number, y: number, options?: SetCenterOptions) => void;
@@ -128,9 +128,19 @@ export function useSvelteFlow(): {
     zoomIn,
     zoomOut,
     getNode: (id) => get(nodeLookup).get(id),
-    getNodes: (ids) => ids.map((id) => get(nodeLookup).get(id)),
+    getNodes: (ids) => {
+      if (!ids) {
+        return get(nodes);
+      }
+      return ids.map((id) => get(nodeLookup).get(id));
+    },
     getEdge: (id) => get(edgeLookup).get(id),
-    getEdges: (ids) => ids.map((id) => get(edgeLookup).get(id)),
+    getEdges: (ids) => {
+      if (!ids) {
+        return get(edges);
+      }
+      return ids.map((id) => get(edgeLookup).get(id));
+    },
     setZoom: (zoomLevel, options) => {
       get(panZoom)?.scaleTo(zoomLevel, { duration: options?.duration });
     },