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Jquery Ajax

In addition to .done, .fail and .always promise callbacks, which are triggered based on whether the request was successful or not, there is the option to trigger a function when a specific HTTP Status Code is returned from the server. This can be done using the statusCode parameter.

 type: {POST or GET or PUT etc.},
 url: {server.url},
 data: {someData: true},
 statusCode: {
 404: function(responseObject, textStatus, jqXHR) {
 // No content found (404)
 // This code will be executed if the server returns a 404 response
 503: function(responseObject, textStatus, errorThrown) {
 // Service Unavailable (503)
 // This code will be executed if the server returns a 503 response
.fail(function(jqXHR, textStatus){
 alert('Something went wrong: ' + textStatus);
.always(function(jqXHR, textStatus) {
 alert('Ajax request was finished')

As official jQuery documentation states:

If the request is successful, the status code functions take the same parameters as the success callback; if it results in an error (including 3xx redirect), they take the same parameters as the error callback.


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