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Next.js

Basics

Excel

Dynamic Routes
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Basics

Excel

Dynamic Routes

Polishing the Post Page

Adding title to the Post Page

In pages/posts/[id].js, let’s add the title tag using the post data. Import next/head and add the title tag:

import Head from 'next/head'

export default function Post({ postData }) {
  return (
    <Layout>
      <Head>
        <title>{postData.title}</title>
      </Head>
      ...
    </Layout>
  )
}

Formatting the Date

To format the date, we’ll use the date-fns library. First, install it:

npm install date-fns

Next, create the Date component at components/date.js:

import { parseISO, format } from 'date-fns'

export default function Date({ dateString }) {
  const date = parseISO(dateString)
  return <time dateTime={dateString}>{format(date, 'LLLL d, yyyy')}</time>
}

Note: You can view the different format() string options here.

And use it in pages/posts/[id].js:

// Add this line to imports
import Date from '../../components/date'

export default function Post({ postData }) {
  return (
    <Layout>
      ...
      {/* Replace {postData.date} with this */}
      <Date dateString={postData.date} />
      ...
    </Layout>
  )
}

If you access http://localhost:3000/posts/pre-rendering, you should now see the date written as “January 1, 2020”.

Adding CSS

Finally, let’s add some CSS. In pages/posts/[id].js, put everything under the article tag and use CSS modules like below:

// Add this line
import utilStyles from '../../styles/utils.module.css'

export default function Post({ postData }) {
  return (
    <Layout>
      <Head>
        <title>{postData.title}</title>
      </Head>
      <article>
        <h1 className={utilStyles.headingXl}>{postData.title}</h1>
        <div className={utilStyles.lightText}>
          <Date dateString={postData.date} />
        </div>
        <div dangerouslySetInnerHTML={{ __html: postData.contentHtml }} />
      </article>
    </Layout>
  )
}

If you access http://localhost:3000/posts/pre-rendering, the page should now look a little better:

Great work! We’ll polish the index page next and we’ll be done!

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