Question

I have the following code for default jQuery AJAX error handling:

$.ajaxSetup({
    error : function(jqXHR, textStatus, errorThrown) {
        alert("Error: " + textStatus + ": " + errorThrown);
    },
    statusCode : {
        404: function() {
            alert("Element not found.");
        }
    }
});

However, when 404 happens, BOTH functions are upcalled: first error, then statusCode, so I see 2 consecutive alerts.

How to prevent this behaviour and get error callback only if statusCode was not upcalled?

Answer 1

How about just checking for status code 404 in your error handler?

$.ajaxSetup({
    error : function(jqXHR, textStatus, errorThrown) {
        if (jqXHR.status == 404) {
            alert("Element not found.");
        } else {
            alert("Error: " + textStatus + ": " + errorThrown);
        }
    }
});