overleaf/services/web/frontend/js/features/event-tracking/document-first-change-event.js

import { isMobileDevice, sendMB } from '@/infrastructure/event-tracking'
import getMeta from '@/utils/meta'

// record once per page load
let recorded = false

export function recordDocumentFirstChangeEvent() {
  if (recorded) return
  recorded = true
  const projectId = getMeta('ol-project_id')
  sendMB('document-first-change', { projectId, isMobileDevice })
}