pleroma-fe/src/services/file_type/file_type.service.js

const fileType = (typeString) => {
  let type = 'unknown'

  if (typeString.match(/text\/html/)) {
    type = 'html'
  }

  if (typeString.match(/image/)) {
    type = 'image'
  }

  if (typeString.match(/video/)) {
    type = 'video'
  }

  if (typeString.match(/audio/)) {
    type = 'audio'
  }

  return type
}

const fileTypeService = {
  fileType
}

export default fileTypeService