FormData

Returns a new FormData object copying all values from the given one and adding the given file with the given key.

FormData.empty()
|> FormData.addFile(
  "key", File.fromString("Contents", "text.txt", "text/plain"))

Returns a new FormData object copying all values from the given one and adding the given string with the given key.

FormData.empty()
|> FormData.addString("key", "value")

Returns an empty FormData object.

FormData.empty()
|> FormData.addString("key", "value")

Returns the keys of a FormData object.

FormData.empty()
|> FormData.addString("key", "value")
|> FormData.keys() == ["key"]