$.getJSON get status

Question

Perform cross domain query, how to perform a certain function if the URL on which it is running is not available (404)? I try something like this:

$.getJSON({
url:'example.php?callback=?',
statusCode: {
404:function(){alert('404');}
},
success :function(data){//do stuff}
});

Answer 1

I found this approach to solve the similar question I had, where I wanted to handle specific status codes differently. For example the '404' code as below.

$.getJSON(AJAX_URL, function(data) {
    //On Success do something.

}).fail(function(jqXHR) {
    if (jqXHR.status == 404) {
        alert("404 Not Found");
    } else {
        alert("Other non-handled error type");
    }
});

There are 3 parameters passed to the fail method:

jqXHR.fail(function(jqXHR, textStatus, errorThrown) {});

An alternative construct to the error callback option, the .fail() method replaces the deprecated .error() method. Refer to deferred.fail() for implementation details.

For the jQuery docs see:
http://api.jquery.com/jQuery.ajax/#jqXHR
http://api.jquery.com/deferred.fail/

Answer 2

 $.getJSON({
       url:'example.php?callback=?'       
    },
      success :function(data){//do stuff}
    })
    .error(function(e, x) { if (x.status == 404) alert('404 - page was not available'); });