content: import React from 'react'
  
  const posts = [
    { slug: 'hello-world', title: 'Hello world' },
    { slug: 'another-blog-post', title: 'Another blog post' }
  ]
  
  export default class extends React.Component {
    static async getInitialProps ({ query, res }) {
      const post = posts.find(post => post.slug === query.slug)
  
      if (!post && res) {
        res.statusCode = 404
      }
  
      return { post }
    }
  
    render () {
      const { post } = this.props
  
      if (!post) return <h1>Post not found</h1>
  
      return <h1>{post.title}</h1>
    }
  }
  