@muze-nl/metro-formdata

npm install @muze-nl/metro-formdata

import { formdata } from '@muze-nl/metro-formdata'

const body = formdata({
  name: 'Leia Organa',
  role: ['princess', 'general']
})

Use this package when you want to build FormData from plain objects, existing FormData, or form elements, while keeping Metro’s .with() style.

Sending a formdata object as the body of a POST/PUT request will automatically convert it to the ‘application/x-www-form-urlencoded’ format.

Reference