1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38/**
* Tests unstable_cache data cache alongside ISR page cache.
*
* Ported from: OpenNext ISR data cache separation pattern
* Tests: ON-1 #8 in TRACKING.md
*
* Demonstrates that unstable_cache (data cache) and page ISR (page cache)
* operate independently — you can invalidate the data cache via revalidateTag
* without invalidating the page cache, and vice versa.
*/
import { unstable_cache } from "next/cache";
const getCachedData = unstable_cache(
async () => {
return {
value: Math.random().toString(36).slice(2, 10),
fetchedAt: Date.now(),
};
},
["unstable-cache-test"],
{ tags: ["unstable-data"], revalidate: 3600 },
);
export const revalidate = 3600;
export default async function UnstableCacheTestPage() {
const data = await getCachedData();
return (
<main data-testid="unstable-cache-page">
<h1>Unstable Cache Test</h1>
<p data-testid="cached-value">CachedValue: {data.value}</p>
<p data-testid="fetched-at">FetchedAt: {data.fetchedAt}</p>
<p data-testid="render-time">RenderTime: {Date.now()}</p>
</main>
);
}