Next.js 15 버전에서 변경된 것

// before
export default function Page({
  params,
}: {
  params: { slug: string }
}) {
  const { slug } = params
  return <div>My Post: {slug}</div>
}

// after
export default async function Page({
  params,
}: {
  params: Promise<{ slug: string }>
}) {
  const slug = (await params).slug
  return <div>My Post: {slug}</div>
}

"use server";

// before
function dosomething() {
  const cookie = cookies().get("hello");
}

// after
async function dosomething() {
  const cookieStore = await cookies();
  const cookie = cookieStore.get("hello");
}