Upload File

$('#verif').on('click', function(){
      var item_number = $('#ch_item_number').val();
      var name        = $('#ch_name').val();
      var lot         = $('#ch_lot').val();
      var side        = $('#ch_side').val();

      const file = document.querySelector('#fileexcel');
      var fileexcel = file.files[0].name;

      if(side == ''){
        error_firstname = 'please select side';
        alert(error_firstname);
      }else{
        $("#frm-verifikasi").on("submit", function(){
          event.preventDefault();
          // CSRF Hash
          var csrfName = $('.txt_csrfname').attr('name'); // CSRF Token name
          var csrfHash = $('.txt_csrfname').val(); // CSRF hash

          // var formData = new FormData(this);
          var dataJson = {
            [csrfName]: csrfHash,
            item_number : $('#ch_item_number').val(),
            name        : $('#ch_name').val(),
            lot         : $('#ch_lot').val(),
            side        : $('#ch_side').val(),
            fileexcel   : file.files[0].name
          };

          // alert(fileexcel);
          // alert(name);

          $.ajax({
            url: "<?php echo base_url('/import_cek'); ?>",
            type: "post",
            data: dataJson,
            dataType: "json",
            success: function(data)
            {
              console.log(data.format_name);
              console.log(data.name_ex);
              console.log(data.nama);
              console.log(data.product_name);
              // Update CSRF Token
              $('.txt_csrfname').val(data.token);
              // console.log(data.respon);
              if(data.respon == 'PASS'){
                // Display a success toast, with a title
                toastr.success('File sesuai', 'Info:');
              }else if(data.respon == 'FAIL'){
                toastr.error('File tidak sesuai', 'Info:');
              }
            },
            error: function (jqXhr, textStatus, errorMessage) { // error callback
              $('p').append('Error: ' + errorMessage);
            }
          });
          return false;

        });
      }
    });