NextJS error on creating FormData POST request in api

Question

I am trying to make a create FormData to submit as a POST within NextJs api route

Dir: /pages/api/file.ts

import { NextApiRequest, NextApiResponse } from 'next'

export const config = {
  api: {
    bodyParser: false
  }
}

export default async (req: NextApiRequest, res: NextApiResponse) => {
  const formdata = new FormData()
  ....

Can someone please explain why this throws the error:

ReferenceError: FormData is not defined

How can this be fixed?