> [!NOTE]
> This codemod requires to install the `@vercel/functions` package.
### Why?
Codemod support for breaking change at
https://github.com/vercel/next.js/pull/68379. It removed the `ip`, and
`geo` properties from the `NextRequest` type. The `NextRequest` type was
mostly used in the `middleware` and `route`.
### How?
The codemod replaces the `ip`, and `geo` properties from the
`NextRequest` with corresponding `@vercel/functions` features.
#### Accessing NextRequest Value
When a file uses `NextRequest`, we look if there's an access to the type
with `geo` or `ip`. This targets destructuring and direct access.
```ts
export function GET (req: NextRequest) {
const { geo, ip: ipAlias, pathname } = req // destructuring
// direct access
req.geo
req.ip
}
```
Declares a variable based on the identifier within the object. If it was
aliased, we use the aliased name.
```ts
import { geolocation, ipAddress } from '@vercel/functions'
export function GET (req: NextRequest) {
const { pathname } = req // destructuring
const geo = geolocation(req)
const ipAlias = ipAddress(req)
// direct access
geolocation(req)
ipAddress(req)
}
```
#### Accessing NextRequest Types
When the file has accessed the `geo | ip` type from `NextRequest`, we
replace with the corresponding types.
```ts
import type { NextRequest } from 'next/server'
export function GET (req: NextRequest) {
const ip = '...' as NextRequest['ip']
const geo = { ... } as NextRequest['geo']
}
```
Since the type for `ip` is `string | undefined`, we explicitly replace
it. For `geo`, we replace with the `Geo` type.
```ts
import type { NextRequest } from 'next/server'
import type { Geo } from '@vercel/functions'
export function GET (req: NextRequest) {
const ip = '...' as string | undefined
const geo = { ... } as Geo
}
```
### Ref
Behavior FYI:
https://github.com/vercel/next.js/pull/70064#discussion_r1768718840,
https://github.com/vercel/next.js/pull/70064#discussion_r1768722282
Closes NDX-291
---------
Co-authored-by: Sebastian Silbermann <silbermann.sebastian@gmail.com>
Co-authored-by: Donny/강동윤 <kdy1997.dev@gmail.com>
Co-authored-by: Jiachi Liu <inbox@huozhi.im>
Sebastian "Sebbie" Silbermann