Output Image is always PNG , croppie not keeping original Format

问题

Output Image is always PNG, croppie not keeping original Format.

I use croppie library I want to get the original image extension, but I got or jpeg or png.

                vanilla.result({
                    type: 'base64',
                    format: 'jpeg',
                    size: 'original'
                }).then(function (resp) {
                    $('.cr-boundary').hide();
                    $('.cr-slider-wrap').hide();
                    $('#hidden_image_input').val(resp);
                    $('#profile_image').attr('src', resp);
                    $('#profile_image').show();

                });

来源：https://stackoverflow.com/questions/57701710/output-image-is-always-png-croppie-not-keeping-original-format