76083210ed
This PR moves the internal logic associated with `req.ua` into an explicit method the user should to call to have the same behavior.
**before**
```typescript
// middleware.ts
import { NextRequest, NextResponse } from 'next/server'
export function middleware(request: NextRequest) {
const url = request.nextUrl
const viewport = request.ua.device.type === 'mobile' ? 'mobile' : 'desktop'
url.searchParams.set('viewport', viewport)
return NextResponse.rewrites(url)
}
```
**after**
```typescript
// middleware.ts
import { NextRequest, NextResponse, userAgent } from 'next/server'
export function middleware(request: NextRequest) {
const url = request.nextUrl
const { device } = userAgent(request)
const viewport = device.type === 'mobile' ? 'mobile' : 'desktop'
url.searchParams.set('viewport', viewport)
return NextResponse.rewrites(url)
}
```
This potentially will save the extra 17 kB related to the size of `ua-parser-js`
28 lines
815 B
TypeScript
28 lines
815 B
TypeScript
export class PageSignatureError extends Error {
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constructor({ page }: { page: string }) {
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super(`The middleware "${page}" accepts an async API directly with the form:
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export function middleware(request, event) {
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return NextResponse.redirect('/new-location')
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}
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Read more: https://nextjs.org/docs/messages/middleware-new-signature
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`)
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}
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}
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export class RemovedPageError extends Error {
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constructor() {
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super(`The request.page has been deprecated in favour of \`URLPattern\`.
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Read more: https://nextjs.org/docs/messages/middleware-request-page
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`)
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}
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}
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export class RemovedUAError extends Error {
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constructor() {
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super(`The request.page has been removed in favour of \`userAgent\` function.
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Read more: https://nextjs.org/docs/messages/middleware-parse-user-agent
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`)
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}
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}
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