元数据

{
  title,
  description,
  keywords,
  authors,
  creator,
  publisher
}

{
  openGraph: {
    title,
    description,
    url,
    siteName,
    images,
    locale,
    type,
  }
}

{
  robots: {
    index: true,
    follow: true,
  }
}

{
  icons: {
    icon: "/favicon.ico",
    apple: "/apple-touch-icon.png",
  }
}

{
  alternates: {
    canonical: "/articles/nextjs"
  }
}

import type { Metadata } from "next";
 
export const metadata: Metadata = {
  title: "About",
  description: "About us",
};

import type { Metadata } from "next";
 
export async function generateMetadata({
  params,
}: {
  params: Promise<{ slug: string }>;
}): Promise<Metadata> {
 
  const { slug } = await params;
 
  const article = await getArticle(slug);
 
  return {
    title: article.title,
    description: article.description,
  };
}