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Next15 `Route "*" has an invalid "GET" export:` エラーが出たら第二引数をPromiseにする

Posted at

Next15で Route "*" has an invalid "GET" export: エラーが出たら、
第二引数をPromiseにすると直ることがあります。
image.png

修正前
{ params }: { params: { username: string } }

修正後
{ params }: { params: Promise< { username: string } > }

route.ts
export async function GET(
  req: NextRequest,
  { params }: { params: Promise<{ username: string }> }
): Promise<NextResponse> {
    // ...
}
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