fix(system): safe check all event target

examples/react/src/examples/AddNodeOnEdgeDrop/index.tsx

@@ -47,7 +47,7 @@ const AddNodeOnEdgeDrop = () => {
     (event) => {
       if (!connectingNodeId.current) return;
 
-      const targetIsPane = (event.target as HTMLDivElement)?.classList.contains('react-flow__pane');
+      const targetIsPane = (event.target as Partial<Element> | null)?.classList?.contains('react-flow__pane');
 
       if (targetIsPane && 'clientX' in event && 'clientY' in event) {
         // we need to remove the wrapper bounds, in order to get the correct position

examples/svelte/src/routes/examples/add-node-on-drop/Flow.svelte

@@ -33,7 +33,7 @@
 		if (!connectingNodeId) return;
 
 		// See of connection landed inside the flow pane
-		const targetIsPane = (event.target as HTMLDivElement)?.classList.contains('svelte-flow__pane');
+		const targetIsPane = (event.target as Partial<Element> | null)?.classList?.contains('svelte-flow__pane');
 		if (targetIsPane && 'clientX' in event && 'clientY' in event) {
 			const id = getId();
 			const position = {

packages/react/src/components/Handle/index.tsx

@@ -175,7 +175,7 @@ function HandleComponent(
       return;
     }
 
-    const doc = getHostForElement(event.target as HTMLElement);
+    const doc = getHostForElement(event.target);
     const isValidConnectionHandler = isValidConnection || isValidConnectionStore;
     const { connection, isValid } = XYHandle.isValid(event.nativeEvent, {
       handle: {

packages/react/src/container/Pane/index.tsx

@@ -131,7 +131,7 @@ export function Pane({
       return;
     }
 
-    (event.target as Element)?.setPointerCapture?.(event.pointerId);
+    (event.target as Partial<Element> | null)?.setPointerCapture?.(event.pointerId);
 
     selectionStarted.current = true;
     selectionInProgress.current = false;
@@ -229,7 +229,7 @@ export function Pane({
       return;
     }
 
-    (event.target as Element)?.releasePointerCapture?.(event.pointerId);
+    (event.target as Partial<Element>)?.releasePointerCapture?.(event.pointerId);
     const { userSelectionRect } = store.getState();
     // We only want to trigger click functions when in selection mode if
     // the user did not move the mouse.

packages/svelte/src/lib/container/Pane/Pane.svelte

@@ -103,7 +103,7 @@
       return;
     }
 
-    (event.target as Element)?.setPointerCapture?.(event.pointerId);
+    (event.target as Partial<Element> | null)?.setPointerCapture?.(event.pointerId);
 
     const { x, y } = getEventPosition(event, containerBounds);
 
@@ -175,7 +175,7 @@
       return;
     }
 
-    (event.target as Element)?.releasePointerCapture?.(event.pointerId);
+    (event.target as Partial<Element> | null)?.releasePointerCapture?.(event.pointerId);
 
     // We only want to trigger click functions when in selection mode if
     // the user did not move the mouse.

packages/system/src/utils/dom.ts

@@ -32,18 +32,20 @@ export const getDimensions = (node: HTMLDivElement): Dimensions => ({
   height: node.offsetHeight,
 });
 
-export const getHostForElement = (element: HTMLElement): Document | ShadowRoot =>
+export const getHostForElement = (element: HTMLElement | EventTarget | null): Document | ShadowRoot =>
-  (element.getRootNode?.() as Document | ShadowRoot) || window?.document;
+  ((element as Partial<HTMLElement> | null)?.getRootNode?.() as Document | ShadowRoot) || window?.document;
 
 const inputTags = ['INPUT', 'SELECT', 'TEXTAREA'];
 
 export function isInputDOMNode(event: KeyboardEvent): boolean {
   // using composed path for handling shadow dom
-  const target = (event.composedPath?.()?.[0] || event.target) as HTMLElement;
+  const target = (event.composedPath?.()?.[0] || event.target) as Element | null;
-  const isInput = inputTags.includes(target?.nodeName) || target?.hasAttribute?.('contenteditable');
+  if (target?.nodeType !== 1 /* Node.ELEMENT_NODE */) return false;
+
+  const isInput = inputTags.includes(target.nodeName) || target.hasAttribute('contenteditable');
 
   // when an input field is focused we don't want to trigger deletion or movement of nodes
-  return isInput || !!target?.closest('.nokey');
+  return isInput || !!target.closest('.nokey');
 }
 
 export const isMouseEvent = (event: MouseEvent | TouchEvent): event is MouseEvent => 'clientX' in event;

packages/system/src/xydrag/XYDrag.ts

@@ -364,7 +364,7 @@ export function XYDrag<OnNodeDrag extends (e: any, nodes: any, node: any) => voi
         }
       })
       .filter((event: MouseEvent) => {
-        const target = event.target as HTMLDivElement;
+        const target = event.target;
         const isDraggable =
           !event.button &&
           (!noDragClassName || !hasSelector(target, `.${noDragClassName}`, domNode)) &&

packages/system/src/xydrag/utils.ts

@@ -18,13 +18,13 @@ export function isParentSelected<NodeType extends NodeBase>(node: NodeType, node
   return isParentSelected(parentNode, nodeLookup);
 }
 
-export function hasSelector(target: Element, selector: string, domNode: Element): boolean {
+export function hasSelector(target: Element | EventTarget | null, selector: string, domNode: Element): boolean {
-  let current = target;
+  let current = target as Partial<Element> | null | undefined;
 
   do {
-    if (current?.matches(selector)) return true;
+    if (current?.matches?.(selector)) return true;
     if (current === domNode) return false;
-    current = current.parentElement as Element;
+    current = current?.parentElement;
   } while (current);
 
   return false;

packages/system/src/xyhandle/XYHandle.ts

@@ -48,7 +48,7 @@ function onPointerDown(
   }: OnPointerDownParams
 ) {
   // when xyflow is used inside a shadow root we can't use document
-  const doc = getHostForElement(event.target as HTMLElement);
+  const doc = getHostForElement(event.target);
   let autoPanId = 0;
   let closestHandle: Handle | null;