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

# up.Request.prototype.failLayer

The [layer](https://unpoly.com/api/up.layer.md) targeted by this request in case the server responds with an [error code](https://unpoly.com/learn/error-responses.md).

Setting the `{ failLayer }` property will automatically derive `{ failContext }` and `{ failMode }` properties.

To prevent memory leaks, this property is removed shortly after the response is received.

---

## Value {#value}

### layer {#layer}

Type: [up.Layer](https://unpoly.com/api/up.Layer.md)