CODE EXAMPLE FOR JAVASCRIPT

console.log formdata

var formData = new FormData();
formData.append('key_one', 'First value');
formData.append('key_two', 'Second value');
formData.append('key_three', 'Thrid value');
// Log the key/value pairs
for (var pair of formData.entries()) {
    console.log(pair[0]+ ' - ' + pair[1]); 
}