overleaf-cep/services/web/frontend/js/features/pdf-preview/components/pdf-preview-detached-root.tsx

import { createRoot } from 'react-dom/client'
import PdfPreview from './pdf-preview'
import useWaitForI18n from '../../../shared/hooks/use-wait-for-i18n'
import { ReactContextRoot } from '@/features/ide-react/context/react-context-root'
import { useDetachCompileContext as useCompileContext } from '@/shared/context/detach-compile-context'
import { useEffect } from 'react'

function PdfPreviewDetachedRoot() {
  const { isReady } = useWaitForI18n()

  if (!isReady) {
    return null
  }

  return (
    <ReactContextRoot>
      <PdfPreviewDetachedRootContent />
    </ReactContextRoot>
  )
}

function PdfPreviewDetachedRootContent() {
  const { activeOverallTheme } = useCompileContext()
  useEffect(() => {
    // NOTE: We cannot use useThemedPage here because we need to read the
    // activeOverallTheme value from the compile context
    document.body.dataset.theme =
      activeOverallTheme === 'dark' ? 'default' : 'light'
  }, [activeOverallTheme])

  return <PdfPreview />
}

export default PdfPreviewDetachedRoot // for testing

const element = document.getElementById('pdf-preview-detached-root')
if (element) {
  const root = createRoot(element)
  root.render(<PdfPreviewDetachedRoot />)
}