This is my code. It works in Firefox and Chrome but not Safari. I get no errors.
Apparently, Safari has no means of getting values stored in FormData objects at this time. There is no workaround at this time, and apparently it's not practical to polyfill.
Sorry :(
Notes: https://developer.mozilla.org/en-US/docs/Web/API/FormData/get#Browser_compatibility https://www.bountysource.com/issues/27573236-is-it-possible-to-polyfill-missing-formdata-methods