Сжатие изображений в браузере

compress.js

$(document).ready(function() {
    $('body').on('change', '.add_image_zamena input', function(){

        var th = $(this);
        var tr = $(th).parents('.reports-list-item');

        var file = [];
        file_temp = $(this)[0].files;
        file[0] = file_temp[0];
        const compress = new Compress();
        compress.compress(file, {
              size: .5,
              quality: .75,
              maxWidth: 1000, 
              maxHeight: 1000
          }).then((results) => {
    
              const img1 = results[0]
              const base64str = img1.data
              const imgExt = img1.ext
              const fileB = Compress.convertBase64ToFile(base64str, imgExt)

              var fileNorm = new File([fileB], results[0]['alt']);
          
               var formData = new FormData();
                $('body').css('cursor', 'progress');
                $('#preloader').show();
                formData.append("image", fileNorm);
                formData.append("id", $(tr).attr('data-id'));
                formData.append("id_basket", $(tr).attr('data-basket-id'));
                formData.append("id_site", $(tr).attr('data-site_id'));
                formData.append("id_order", $(tr).attr('data-order_id'));



                $.ajax({
                    type: "POST",
                    processData: false,
                    contentType: false,
                    url: "/local/ajax/savefile.php",
                    data:  formData 
                    })
                    .done(function( data ) {
                        $(th).parents('td').find('.add_image_zamena').before('<a target="_blank" href="' + data + '" class="fancybox"><img width="120" src="' + data + '"></a>'); 
                        $('body').css('cursor', 'inherit');
                        $('.fancybox').fancybox();
                        $('#preloader').hide();
                    });
              
            
          })

       
    });
});