How to parse Markdown in Next.js
I had a field with markdown and I wanted to print it in a Next.js page.
I used marked
, dompurify
and jsdom. Here’s an example in a Next.js dynamic page, to render an item’s description.
Note that I had to call DOMPurify.sanitize()
server-side, as it assumes we’re in a Node.js environment, so I put it into getStaticProps()
:
import { useState, useEffect } from 'react'
import Head from 'next/head'
import Link from 'next/link'
import { useRouter } from 'next/router'
import { getJob, getJobs } from 'lib/data.js'
import prisma from 'lib/prisma'
import marked from 'marked'
import createDOMPurify from 'dompurify'
import { JSDOM } from 'jsdom'
export default function Item({ item }) {
return <p>{item.description}</p>
}
export async function getStaticPaths() { //data fetching
const items = await getItems(prisma)
return {
paths: items.map(job => ({
params: {
id: String(item.id),
},
})),
fallback: false,
}
}
export async function getStaticProps({ params }) {
const id = String(params.id)
const item = await getItem(prisma, id) //unrelated
const window = new JSDOM('').window
const DOMPurify = createDOMPurify(window)
item.description = DOMPurify.sanitize(marked(item.description))
return { props: { item } }
}
→ Get my Next.js (pages router) Handbook
I wrote 17 books to help you become a better developer, download them all at $0 cost by joining my newsletter
JOIN MY CODING BOOTCAMP, an amazing cohort course that will be a huge step up in your coding career - covering React, Next.js - next edition February 2025