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---
id: placeholder-query-data
title: Placeholder Query Data
ref: docs/framework/react/guides/placeholder-query-data.md
---
[//]: # 'ExampleValue'
```tsx
const result = useQuery({
queryKey: ['todos'],
queryFn: () => fetch('/todos'),
placeholderData: placeholderTodos,
})
```
[//]: # 'ExampleValue'
[//]: # 'Memoization'
[//]: # 'Memoization'
[//]: # 'ExampleCache'
```tsx
const result = useQuery({
queryKey: ['blogPost', blogPostId],
queryFn: () => fetch(`/blogPosts/${blogPostId}`),
placeholderData: () => {
// Use the smaller/preview version of the blogPost from the 'blogPosts'
// query as the placeholder data for this blogPost query
return queryClient
.getQueryData(['blogPosts'])
?.find((d) => d.id === blogPostId)
},
})
```
[//]: # 'ExampleCache'
[//]: # 'Materials'
[//]: # 'Materials'
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