---
url: /api/symbols/workbox-swkit/routing/setcatchhandler.md
---

# setCatchHandler

Function @vite-pwa/workbox-swkit/routing

```ts
setCatchHandler(handler: RouteHandler): void
```

If a Route throws an error while handling a request, this `handler`
will be called and given a chance to provide a response.

### Parameters

* `handler` – A callback
  function that returns a Promise resulting in a Response.