Render JSON as HTML and escape unsupported extensions

[atareversei]

Hi, I am creating HTML from JSON string that is created by TipTap editor to view it on my page, roughly like the code snippet below:

const plugins = [
    BlockQuote,
    // other extensions...
    Text,
];

const html = generateHTML(JSON.parse(json) as unknown as JSONContent, plugins);

But because some users are copy-pasting rich text from other places into the text editor at first, when they want to view it later, they face an error saying "HardBreak (or any other extension that is not defined in the plugins array) is not supported" or something along those lines.

Is there any way to tell the generator function to skip those unknown/unsupported tags/extensions?

[nperez0111]

You can try something like this:

import { getSchema } from '@tiptap/core'

/**
 * Get the invalid content from the `JSONContent`.
 */
function rewriteContent({ json, validMarks, validNodes }) {
  if (json.marks && Array.isArray(json.marks)) {
    json.marks = json.marks.filter(mark => {
      const name = typeof mark === 'string' ? mark : mark.type

      if (validMarks.has(name)) {
        return true
      }

      // Just ignore any unknown marks
      return false
    })
  }

  if (json.content && Array.isArray(json.content)) {
    json.content = Object.values(json.content).map(value => rewriteContent({
      validMarks,
      validNodes,
      json: value,
    }))
  }

  if (!validNodes.has(json.type)) {
    // Just treat it like a paragraph and hope for the best
    json.type = 'paragraph'
  }

 return json
}

export function rewriteUnknownContent(
  json,
  extensions,
) {
  const schema = getSchema(extensions)
  const validMarks = new Set(Object.keys(schema.marks))
  const validNodes = new Set(Object.keys(schema.nodes))

  return rewriteContent({
    json,
    validNodes,
    validMarks,
  })
}

But I did not test it fully

[SimonTernoir]

Removing Object.map and returning json at the end of rewriteContent seems to work 👍

[nperez0111]

Updated, I had written this directly into the text box so I had messed up