---
title: IsCookieFunction
---

# IsCookieFunction

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[MODES: framework, data]

## Summary

[Reference Documentation ↗](https://api.reactrouter.com/v8/types/react-router.IsCookieFunction.html)

A function that determines whether a value is a React Router [`Cookie`](https://api.reactrouter.com/v8/interfaces/react-router.Cookie.html)
object.

## Signature

```tsx
type IsCookieFunction = (object: any) => object is Cookie;
```

## Params

### object

The value to check.

## Returns

`true` if the value is a React Router [`Cookie`](https://api.reactrouter.com/v8/interfaces/react-router.Cookie.html) object;
otherwise, `false`.