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

examples/react/chat/src/chat.ts

@@ -0,0 +1,33 @@
+import {
+  queryOptions,
+  experimental_streamedQuery as streamedQuery,
+} from '@tanstack/react-query'
+
+const answers = [
+  "I'm just an example chat, I can't really answer any questions :(".split(' '),
+  'TanStack is great. Would you like to know more?'.split(' '),
+]
+
+function chatAnswer(_question: string) {
+  return {
+    async *[Symbol.asyncIterator]() {
+      const answer = answers[Math.floor(Math.random() * answers.length)]
+      let index = 0
+      while (index < answer.length) {
+        await new Promise((resolve) =>
+          setTimeout(resolve, 100 + Math.random() * 300),
+        )
+        yield answer[index++]
+      }
+    },
+  }
+}
+
+export const chatQueryOptions = (question: string) =>
+  queryOptions({
+    queryKey: ['chat', question],
+    queryFn: streamedQuery({
+      streamFn: () => chatAnswer(question),
+    }),
+    staleTime: Infinity,
+  })