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---
id: query-keys
title: Query Keys
ref: docs/framework/react/guides/query-keys.md
#todo: exhaustive-deps is at least for now React-only
---
[//]: # 'Example'
```ts
// A list of todos
injectQuery(() => ({ queryKey: ['todos'], ... }))
// Something else, whatever!
injectQuery(() => ({ queryKey: ['something', 'special'], ... }))
```
[//]: # 'Example'
[//]: # 'Example2'
```ts
// An individual todo
injectQuery(() => ({queryKey: ['todo', 5], ...}))
// An individual todo in a "preview" format
injectQuery(() => ({queryKey: ['todo', 5, {preview: true}], ...}))
// A list of todos that are "done"
injectQuery(() => ({queryKey: ['todos', {type: 'done'}], ...}))
```
[//]: # 'Example2'
[//]: # 'Example3'
```ts
injectQuery(() => ({ queryKey: ['todos', { status, page }], ... }))
injectQuery(() => ({ queryKey: ['todos', { page, status }], ...}))
injectQuery(() => ({ queryKey: ['todos', { page, status, other: undefined }], ... }))
```
[//]: # 'Example3'
[//]: # 'Example4'
```ts
injectQuery(() => ({ queryKey: ['todos', status, page], ... }))
injectQuery(() => ({ queryKey: ['todos', page, status], ...}))
injectQuery(() => ({ queryKey: ['todos', undefined, page, status], ...}))
```
[//]: # 'Example4'
[//]: # 'Example5'
```ts
todoId = signal(-1)
injectQuery(() => ({
enabled: todoId() > 0,
queryKey: ['todos', todoId()],
queryFn: () => fetchTodoById(todoId()),
}))
```
[//]: # 'Example5'
[//]: # 'Materials'
[//]: # 'Materials'
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