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fix(examples): guard the react shadow-dom mount target #10431

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Merged
TkDodo merged 1 commit into from
Apr 9, 2026
+24 −25
Merged

fix(examples): guard the react shadow-dom mount target #10431

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49 changes: 24 additions & 25 deletions examples/react/shadow-dom/src/main.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -6,30 +6,29 @@ import { ReactQueryDevtools } from '@tanstack/react-query-devtools'
import { DogList } from './DogList'

const appRoot = document.getElementById('root')
if (!appRoot) throw new Error('Missing #root element')

if (appRoot) {
const queryClient = new QueryClient()
const shadowRoot = appRoot.attachShadow({ mode: 'open' })
const root = ReactDOM.createRoot(shadowRoot)
const queryClient = new QueryClient()
const shadowRoot = appRoot.attachShadow({ mode: 'open' })
const root = ReactDOM.createRoot(shadowRoot)

root.render(
<React.StrictMode>
<QueryClientProvider client={queryClient}>
<div
style={{
width: '100vw',
padding: '30px',
}}
>
<h2>Dog Breeds</h2>
<DogList />
</div>
<ReactQueryDevtools
initialIsOpen={false}
buttonPosition="bottom-left"
shadowDOMTarget={appRoot.shadowRoot!}
/>
</QueryClientProvider>
</React.StrictMode>,
)
}
root.render(
<React.StrictMode>
<QueryClientProvider client={queryClient}>
<div
style={{
width: '100vw',
padding: '30px',
}}
>
<h2>Dog Breeds</h2>
<DogList />
</div>
<ReactQueryDevtools
initialIsOpen={false}
buttonPosition="bottom-left"
shadowDOMTarget={shadowRoot}
/>
</QueryClientProvider>
</React.StrictMode>,
)
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