TypeScript version of jQuery's serializeArray()

serializeArray.ts

// see also: https://barker.codes/blog/serialize-form-data-into-an-array-in-vanilla-js/

// NOTE: type FormDataEntryValue = File | string
type SerializeArray = { [x: string]: FormDataEntryValue }

const serializeArray = (form: HTMLFormElement): SerializeArray => {
  const result: SerializeArray = <SerializeArray>{}

  const formData: FormData = new FormData(form)

  formData.forEach((val: FormDataEntryValue, key: string) => result[key] = val)
  
  return result
}