---
name: "up.Preview.prototype.expiredResponse"
area: "API"
kind: "Property"
parent: "up.Preview class"
visibility: "experimental"
url: "https://unpoly.com/api/up.Preview.prototype.expiredResponse"
---
<nav aria-label="Unpoly docs">[All docs](https://unpoly.com/index.md) · [up.Preview class](https://unpoly.com/api/up.Preview.md)</nav>

# up.Preview.prototype.expiredResponse

**This feature is experimental**. Please [share](https://github.com/unpoly/unpoly/discussions) your experiences so we know what to keep or change.

When [revalidating a cache entry](https://unpoly.com/api/up.Preview.prototype.revalidating.md), this property is the cached response with expired content.

When not revalidating, this property is `undefined`.

---

## Return value {#return-value}

The expired response object.

Type: [up.Response](https://unpoly.com/api/up.Response.md) | undefined