chore(onbeforedelete): use correct node/edge types, pass generic

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

@@ -23,7 +23,6 @@ import {
   type OnConnectStart,
   type OnConnectEnd,
   type NodeLookup,
-  type OnBeforeDelete,
   type EdgeLookup
 } from '@xyflow/system';
 
@@ -47,7 +46,8 @@ import type {
   Edge,
   FitViewOptions,
   OnDelete,
-  OnEdgeCreate
+  OnEdgeCreate,
+  OnBeforeDelete
 } from '$lib/types';
 import { createNodesStore, createEdgesStore } from './utils';
 import { initConnectionProps, type ConnectionProps } from './derived-connection-props';

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

@@ -5,7 +5,8 @@ import type {
   Position,
   XYPosition,
   ConnectingHandle,
-  Connection
+  Connection,
+  OnBeforeDeleteBase
 } from '@xyflow/system';
 
 import type { Node } from './nodes';
@@ -52,3 +53,7 @@ export type FitViewOptions = FitViewOptionsBase<Node>;
 
 export type OnDelete = (params: { nodes: Node[]; edges: Edge[] }) => void;
 export type OnEdgeCreate = (connection: Connection) => Edge | Connection | void;
+export type OnBeforeDelete<
+  NodeType extends Node = Node,
+  EdgeType extends Edge = Edge
+> = OnBeforeDeleteBase<NodeType, EdgeType>;