snapshot of https://github.com/TanStack/query.git (main, 2026-09-16; blobs > 131072B omitted)

docs/framework/solid/guides/query-functions.md

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+---
+id: query-functions
+title: Query Functions
+ref: docs/framework/react/guides/query-functions.md
+---
+
+[//]: # 'Example'
+
+```tsx
+useQuery(() => ({ queryKey: ['todos'], queryFn: fetchAllTodos }))
+useQuery(() => ({
+  queryKey: ['todos', todoId],
+  queryFn: () => fetchTodoById(todoId),
+}))
+useQuery(() => ({
+  queryKey: ['todos', todoId],
+  queryFn: async () => {
+    const data = await fetchTodoById(todoId)
+    return data
+  },
+}))
+useQuery(() => ({
+  queryKey: ['todos', todoId],
+  queryFn: ({ queryKey }) => fetchTodoById(queryKey[1]),
+}))
+```
+
+[//]: # 'Example'
+[//]: # 'Example2'
+
+```tsx
+const todosQuery = useQuery(() => ({
+  queryKey: ['todos', todoId],
+  queryFn: async () => {
+    if (somethingGoesWrong) {
+      throw new Error('Oh no!')
+    }
+    if (somethingElseGoesWrong) {
+      return Promise.reject(new Error('Oh no!'))
+    }
+
+    return data
+  },
+}))
+```
+
+[//]: # 'Example2'
+[//]: # 'Example3'
+
+```tsx
+useQuery(() => ({
+  queryKey: ['todos', todoId],
+  queryFn: async () => {
+    const response = await fetch('/todos/' + todoId)
+    if (!response.ok) {
+      throw new Error('Network response was not ok')
+    }
+    return response.json()
+  },
+}))
+```
+
+[//]: # 'Example3'
+[//]: # 'Example4'
+
+```tsx
+function Todos(props) {
+  const todosQuery = useQuery(() => ({
+    queryKey: ['todos', { status: props.status, page: props.page }],
+    queryFn: fetchTodoList,
+  }))
+}
+
+// Access the key, status and page variables in your query function!
+function fetchTodoList({ queryKey }) {
+  const [_key, { status, page }] = queryKey
+  return new Promise()
+}
+```
+
+[//]: # 'Example4'