payloadcms/packages/richtext-slate/src/data/validation.ts

import type { RichTextField, Validate } from 'payload/types'

import type { AdapterArguments } from '../types'

import { defaultRichTextValue } from './defaultValue'

export const richText: Validate<unknown, unknown, RichTextField<AdapterArguments>> = (
  value,
  { required, t },
) => {
  if (required) {
    const stringifiedDefaultValue = JSON.stringify(defaultRichTextValue)
    if (value && JSON.stringify(value) !== stringifiedDefaultValue) return true
    return t('validation:required')
  }

  return true
}