在jQuery Ajax中获取“ parsererror”

Question

Below is my AJAX code. Here I'm hitting a service with one value. The service is getting called successfully, but it is not going into the success method. It is going into the error method only. In the error method it is giving parsererror and message: Unexpected token S

$.ajax({
    type: 'GET',
    url: 'http://domin.com:9000/ramsweb/rest/DetailRest/addOrderContacts/123456/' + customerId,
    success: function (data, status, xhr) {
        console.log(data);
        $("#loadingSpinner").hide();
    },
    error: function (jqXhr, textStatus, errorMessage) {
        $('.ErrorMsg').html('<h5>An error has occurred</h5>');
    },
    fail: function (data) {
        $('.ErrorMsg').html('<h5>data loading failed</h5>');
    }
});

Answer 1

jQuery AJAX functions by default will try to detect the type of response depending on other pieces of data in your request and response (headers etc.)

Most likely, your endpoint serves it as JSON thus telling jQuery to internally do a JSON.parse . However, your endpoint may be serving an error page instead of JSON which can cause parse errors like this.