Problem with form + ajax

Question

I made an ajax request to send the data from a form to the server, the data is sent and stored perfectly. But when processing the Success creating the condition, should the return of result were the standard 200 or "OK" would send a message of success and if not, the error message. However, in doing so I realized that the result was not returning because it already fell straight into Isis. And even dropping ELSE, it stores the data on the server, but throws the error message.

function sendForm()
{

  $("#divSucesso").hide();
  $("#divError").hide();

  document.getElementById("btnEnviarForm").disabled = true;
  // var formAgenda = document.getElementById("form");
  var formData = new FormData (document.forms[0]);

  $.ajax({
      url: 'insert.php',
      type: 'POST',
      async: true,
      dataType: 'html',
      data: formData,
      processData: false,
      contentType: false,

      success: function (result) {

          if (result.substring(0, 2) == "OK")
          {
            document.getElementById('divSucesso').innerHTML = "Dados salvos com sucesso: " + result;
            $("#divSucesso").stop().fadeIn(200).delay(50000).fadeOut(200);
            document.getElementById("form").reset();
          }
          else
            showMessageError(result);

          document.getElementById("btnEnviarForm").disabled = false;            
        },

      error: function (xhr, status, error) {

      showMessageError(status + error + xhr.responseText);
      document.getElementById("btnEnviarForm").disabled = false;
    }

  });

}

  function showMessageError(message)
  {
    document.getElementById("errorMsg").innerHTML = message;
    $("#divError").fadeIn(200).delay(2500).fadeOut(200);
  }

Answer 1

In jQuery’s Ajax, the success: already means that the code status of the return XHR was 200. It is redundant to make a OK (that would be the xhr.statusText in the third return parameter) inside the callback, since it will always be "OK" in the success::

success: function (result, status, xhr){

   // result -> dados HTML de retorno
   // status -> retorna a string "success"
   // xhr    -> objeto XHR gerado

}

To get the return codes 200 and OK:

success: function (result, status, xhr){

   xhr.status; // retorna "200"
   xhr.statusText; // retorna "OK"

}