Migrate package : htmlAsRichText Error

Developing with Prismic
1

Hi,

I setup a minimal test to convert HTML content from our old data sources to Prismic, but I can't get it to work :

import { htmlAsRichText } from '@prismicio/migrate'

const html = '<p>Hello</p>'
const richText = htmlAsRichText(html)

console.log(richText)

When running this with nodejs 22.14.0, this error is thrown :

Error: Expected usable value but received an empty preset, which is probably a mistake: presets typically come with `plugins` and sometimes with `settings`, but this has neither
    at addPreset (node_modules/unified/lib/index.js:1110:15)
    at Function.use (node_modules/unified/lib/index.js:1076:9)
    at htmlAsRichText (node_modules/@prismicio/src/htmlAsRichText.ts:112:4)
    at <anonymous> (import-test.ts:6:18)

Thanks for your help !

2

Hi @gbelorgey,

The error you’re seeing is related to the unified library, which @prismicio/migrate depends on for parsing HTML. Here's some possible causes to look at:

  1. Missing rehype Dependencies
    The unified processor expects certain rehype plugins to be present. Try installing them manually:

    npm install rehype-parse rehype-stringify

  2. Use esm Imports
    Since you're using Node.js 22, try using import instead of require, and make sure your package.json has:

    "type": "module"

  3. Upgrade @prismicio/migrate
    Check if you're using the latest version of @prismicio/migrate with:

    npm outdated @prismicio/migrate

    Then update if needed:

    npm update @prismicio/migrate

Let me know how that goes, and if these help at all!

3

Hi @Ezekiel

I was missing

"type": "module"

in my package.json, thank you so much for your help !

1 Like
4

Happy to help! Thanks for letting me know what worked :slight_smile: