ajax_file_upload_form_netlify.js

$('#myForm').on('sumbit', function(){
          var form = $(this);
          var formdata = false;
          if (window.FormData){
              formdata = new FormData(form[0]);
          }
      
          var formAction = form.attr('action');
          $.ajax({
              url         : '/',
              data        : formdata ? formdata : form.serialize(),
              cache       : false,
              contentType : false,
              processData : false,
              type        : 'POST',
              success     : function(data, textStatus, jqXHR){
                  alert('success')
              }
          });
      });