fix

Author: ibgreen

modules/react/src/utils/use-widget.ts

@@ -23,7 +23,7 @@ export function useWidget<WidgetT extends Widget, WidgetPropsT extends WidgetPro
     return () => {
       // Remove widget from context when it is unmounted
       const index = widgets?.indexOf(widget);
-      if (index !== -1) {
+      if (typeof index === 'number' && index !== -1) {
         widgets?.splice(index, 1);
         deck?.setProps({widgets});
       }

test/modules/react/deckgl.spec.ts

@@ -8,7 +8,8 @@ import {StrictMode, createElement, createRef} from 'react';
 import {createRoot} from 'react-dom/client';
 import {act} from 'react-dom/test-utils';
 
-import {DeckGL, Layer, Widget, useWidget} from 'deck.gl';
+import {DeckGL, Layer, Widget} from 'deck.gl';
+import {useWidget} from '@deck.gl/react';
 import {type WidgetProps, type WidgetPlacement} from '@deck.gl/core';
 
 import {gl} from '@deck.gl/test-utils';