diff --git a/packages/react/src/hooks/useReactFlow.ts b/packages/react/src/hooks/useReactFlow.ts
index da65a4e3..70f5e203 100644
--- a/packages/react/src/hooks/useReactFlow.ts
+++ b/packages/react/src/hooks/useReactFlow.ts
@@ -178,7 +178,7 @@ export default function useReactFlow<NodeData = any, EdgeData = any>(): ReactFlo
 
   const getNodeRect = useCallback(
     (
-      nodeOrRect: (Partial<Node<NodeData>> & { id: Node['id'] }) | Rect
+      nodeOrRect: Node<NodeData> | { id: Node['id'] } | Rect
     ): [Rect | null, Node<NodeData> | null | undefined, boolean] => {
       const isRect = isRectObject(nodeOrRect);
       const node = isRect ? null : store.getState().nodes.find((n) => n.id === nodeOrRect.id);
diff --git a/packages/react/src/types/instance.ts b/packages/react/src/types/instance.ts
index 3d123c1a..f229ec87 100644
--- a/packages/react/src/types/instance.ts
+++ b/packages/react/src/types/instance.ts
@@ -10,8 +10,8 @@ export type ReactFlowJsonObject<NodeData = any, EdgeData = any> = {
 };
 
 export type DeleteElementsOptions = {
-  nodes?: (Partial<Node> & { id: Node['id'] })[];
-  edges?: (Partial<Edge> & { id: Edge['id'] })[];
+  nodes?: (Node | { id: Node['id'] })[];
+  edges?: (Edge | { id: Edge['id'] })[];
 };
 
 export namespace Instance {
@@ -33,18 +33,18 @@ export namespace Instance {
     deletedEdges: Edge[];
   };
   export type GetIntersectingNodes<NodeData> = (
-    node: (Partial<Node<NodeData>> & { id: Node['id'] }) | Rect,
+    node: Node<NodeData> | { id: Node['id'] } | Rect,
     partially?: boolean,
     nodes?: Node<NodeData>[]
   ) => Node<NodeData>[];
   export type IsNodeIntersecting<NodeData> = (
-    node: (Partial<Node<NodeData>> & { id: Node['id'] }) | Rect,
+    node: Node<NodeData> | { id: Node['id'] } | Rect,
     area: Rect,
     partially?: boolean
   ) => boolean;
-  export type getConnectedEdges = (id: string | (Partial<Node> & { id: Node['id'] })[]) => Edge[];
-  export type getIncomers = (node: string | (Partial<Node> & { id: Node['id'] })) => Node[];
-  export type getOutgoers = (node: string | (Partial<Node> & { id: Node['id'] })) => Node[];
+  export type getConnectedEdges = (id: string | (Node | { id: Node['id'] })[]) => Edge[];
+  export type getIncomers = (node: string | Node | { id: Node['id'] }) => Node[];
+  export type getOutgoers = (node: string | Node | { id: Node['id'] }) => Node[];
 }
 
 export type ReactFlowInstance<NodeData = any, EdgeData = any> = {
diff --git a/packages/svelte/src/lib/hooks/useSvelteFlow.ts b/packages/svelte/src/lib/hooks/useSvelteFlow.ts
index 756b856c..d4a832d9 100644
--- a/packages/svelte/src/lib/hooks/useSvelteFlow.ts
+++ b/packages/svelte/src/lib/hooks/useSvelteFlow.ts
@@ -31,26 +31,26 @@ export function useSvelteFlow(): {
   getViewport: () => Viewport;
   fitView: (options?: FitViewOptions) => void;
   getIntersectingNodes: (
-    nodeOrRect: (Partial<Node> & { id: Node['id'] }) | Rect,
+    nodeOrRect: Node | { id: Node['id'] } | Rect,
     partially?: boolean,
     nodesToIntersect?: Node[]
   ) => Node[];
   isNodeIntersecting: (
-    nodeOrRect: (Partial<Node> & { id: Node['id'] }) | Rect,
+    nodeOrRect: Node | { id: Node['id'] } | Rect,
     area: Rect,
     partially?: boolean
   ) => boolean;
   fitBounds: (bounds: Rect, options?: FitBoundsOptions) => void;
   deleteElements: (
-    nodesToRemove?: Partial<Node> & { id: string }[],
-    edgesToRemove?: Partial<Edge> & { id: string }[]
+    nodesToRemove?: (Node | { id: Node['id'] })[],
+    edgesToRemove?: (Edge | { id: Edge['id'] })[]
   ) => { deletedNodes: Node[]; deletedEdges: Edge[] };
   screenToFlowCoordinate: (position: XYPosition) => XYPosition;
   flowToScreenCoordinate: (position: XYPosition) => XYPosition;
   viewport: Writable<Viewport>;
-  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[];
+  getConnectedEdges: (id: string | (Node | { id: Node['id'] })[]) => Edge[];
+  getIncomers: (node: string | Node | { id: Node['id'] }) => Node[];
+  getOutgoers: (node: string | Node | { id: Node['id'] }) => Node[];
 } {
   const {
     zoomIn,
@@ -69,7 +69,7 @@ export function useSvelteFlow(): {
   } = useStore();
 
   const getNodeRect = (
-    nodeOrRect: (Partial<Node> & { id: Node['id'] }) | Rect
+    nodeOrRect: Node | { id: Node['id'] } | Rect
   ): [Rect | null, Node | null | undefined, boolean] => {
     const isRect = isRectObject(nodeOrRect);
     const node = isRect ? null : get(nodes).find((n) => n.id === nodeOrRect.id);
@@ -136,7 +136,7 @@ export function useSvelteFlow(): {
       );
     },
     getIntersectingNodes: (
-      nodeOrRect: (Partial<Node> & { id: Node['id'] }) | Rect,
+      nodeOrRect: Node | { id: Node['id'] } | Rect,
       partially = true,
       nodesToIntersect?: Node[]
     ) => {
@@ -155,11 +155,11 @@ export function useSvelteFlow(): {
         const overlappingArea = getOverlappingArea(currNodeRect, nodeRect);
         const partiallyVisible = partially && overlappingArea > 0;
 
-        return partiallyVisible || overlappingArea >= nodeOrRect.width! * nodeOrRect.height!;
+        return partiallyVisible || overlappingArea >= nodeRect.width * nodeRect.height;
       });
     },
     isNodeIntersecting: (
-      nodeOrRect: (Partial<Node> & { id: Node['id'] }) | Rect,
+      nodeOrRect: Node | { id: Node['id'] } | Rect,
       area: Rect,
       partially = true
     ) => {
@@ -172,11 +172,11 @@ export function useSvelteFlow(): {
       const overlappingArea = getOverlappingArea(nodeRect, area);
       const partiallyVisible = partially && overlappingArea > 0;
 
-      return partiallyVisible || overlappingArea >= nodeOrRect.width! * nodeOrRect.height!;
+      return partiallyVisible || overlappingArea >= nodeRect.width * nodeRect.height;
     },
     deleteElements: (
-      nodesToRemove: Partial<Node> & { id: string }[] = [],
-      edgesToRemove: Partial<Edge> & { id: string }[] = []
+      nodesToRemove: (Node | { id: Node['id'] })[] = [],
+      edgesToRemove: (Edge | { id: Edge['id'] })[] = []
     ) => {
       const _nodes = get(nodes);
       const _edges = get(edges);
diff --git a/packages/svelte/src/lib/types/edges.ts b/packages/svelte/src/lib/types/edges.ts
index 3f65be9c..33f0d908 100644
--- a/packages/svelte/src/lib/types/edges.ts
+++ b/packages/svelte/src/lib/types/edges.ts
@@ -39,6 +39,8 @@ export type Edge<T = any> =
 
 export type EdgeProps = Omit<Edge, 'sourceHandle' | 'targetHandle'> &
   EdgePosition & {
+    markerStart?: string;
+    markerEnd?: string;
     sourceHandleId?: string | null;
     targetHandleId?: string | null;
   };
diff --git a/packages/system/src/types/general.ts b/packages/system/src/types/general.ts
index d23dee9b..bc86442d 100644
--- a/packages/system/src/types/general.ts
+++ b/packages/system/src/types/general.ts
@@ -63,7 +63,7 @@ export type FitViewOptionsBase<NodeType extends NodeBase> = {
   minZoom?: number;
   maxZoom?: number;
   duration?: number;
-  nodes?: (Partial<NodeType> & { id: NodeType['id'] })[];
+  nodes?: (NodeType | { id: NodeType['id'] })[];
 };
 
 export type Viewport = {
diff --git a/packages/system/src/utils/graph.ts b/packages/system/src/utils/graph.ts
index 17467503..d9ef7163 100644
--- a/packages/system/src/utils/graph.ts
+++ b/packages/system/src/utils/graph.ts
@@ -35,7 +35,7 @@ export const isNodeBase = <NodeType extends NodeBase = NodeBase, EdgeType extend
 ): element is NodeType => 'id' in element && !('source' in element) && !('target' in element);
 
 export const getOutgoersBase = <NodeType extends NodeBase = NodeBase, EdgeType extends EdgeBase = EdgeBase>(
-  node: Partial<NodeType> & { id: string },
+  node: NodeType | { id: string },
   nodes: NodeType[],
   edges: EdgeType[]
 ): NodeType[] => {
@@ -54,7 +54,7 @@ export const getOutgoersBase = <NodeType extends NodeBase = NodeBase, EdgeType e
 };
 
 export const getIncomersBase = <NodeType extends NodeBase = NodeBase, EdgeType extends EdgeBase = EdgeBase>(
-  node: Partial<NodeType> & { id: string },
+  node: NodeType | { id: string },
   nodes: NodeType[],
   edges: EdgeType[]
 ): NodeType[] => {