---
url: /api/symbols/workbox-swkit/core/copyresponse.md
---

# copyResponse

Function @vite-pwa/workbox-swkit/core

```ts
copyResponse(response: Response, modifier?: (responseInit: ResponseInit) => ResponseInit): Promise<Response>
```

Allows developers to copy a response and modify its `headers`, `status`,
or `statusText` values (the values settable via a
\[`ResponseInit`]https://developer.mozilla.org/en-US/docs/Web/API/Response/Response#Syntax
object in the constructor).
To modify these values, pass a function as the second argument. That
function will be invoked with a single object with the response properties
`{headers, status, statusText}`. The return value of this function will
be used as the `ResponseInit` for the new `Response`. To change the values
either modify the passed parameter(s) and return it, or return a totally
new object.

This method is intentionally limited to same-origin responses, regardless of
whether CORS was used or not.