vercel__next.js/examples/cms-dotcms/pages/posts/[slug].tsx

import { useRouter } from "next/router";
import Head from "next/head";
import ErrorPage from "next/error";
import Container from "@components/container";
import MoreStories from "@components/more-stories";
import Header from "@components/header";
import PostHeader from "@components/post-header";
import PostBody from "@components/post-body";
import SectionSeparator from "@components/section-separator";
import Layout from "@components/layout";
import PostTitle from "@components/post-title";
import { CMS_NAME } from "@lib/constants";
import { getAllPostsWithSlug, getPostAndMorePosts } from "@lib/api";

export default function Post({ post, morePosts, preview }) {
  const router = useRouter();

  if (!router.isFallback && !post) {
    return <ErrorPage statusCode={404} />;
  }

  const title = `${
    post?.title || "dotcms"
  } | Next.js Blog Example with ${CMS_NAME}`;

  return (
    <Layout preview={preview}>
      <Container>
        <Header />
        {router.isFallback ? (
          <PostTitle>Loading…</PostTitle>
        ) : (
          <>
            <article>
              <Head>
                <title>{title}</title>
                <meta
                  property="og:image"
                  content={`${process.env.NEXT_PUBLIC_DOTCMS_HOST}${post.image.idPath}`}
                />
              </Head>

              <PostHeader
                title={post.title}
                coverImage={post.image}
                author={post.author}
              />

              <PostBody content={post} />
            </article>

            <SectionSeparator />

            {morePosts && morePosts.length > 0 && (
              <MoreStories posts={morePosts} />
            )}
          </>
        )}
      </Container>
    </Layout>
  );
}

export async function getStaticProps({ params, preview = false }) {
  const data = await getPostAndMorePosts(params.slug, preview);

  return {
    props: {
      preview,
      ...data,
    },
  };
}

export async function getStaticPaths() {
  const allPosts = await getAllPostsWithSlug();

  return {
    paths: allPosts?.map((post) => `/posts/${post.urlTitle}`) || [],
    fallback: true,
  };
}