jQuery .get error response function?

Thanks to StackOverflow, I managed to get the following code working perfectly, but I have a follow up question.

$.get('http://example.com/page/2/', function(data){
$(data).find('#reviews .card').appendTo('#reviews');
});

This code above enabled my site to fetch a second page of articles with a Load More button in WordPress. However when the site runs out of pages/results, I'm running into a small issue. The load more button remains in place. It will keep trying to fetch data even if no pages are remaining.

How can I tweak this command so that I can show a visual response if the .get request fails or is a (404) not found page for instance?

If someone could help me out with a simple example of even an alert("woops!"); that would be awesome!

Thanks!

124026 次浏览
小开
最佳答案

$.get does not give you the opportunity to set an error handler. You will need to use the low-level $.ajax function instead:

$.ajax({
url: 'http://example.com/page/2/',
type: 'GET',
success: function(data){
$(data).find('#reviews .card').appendTo('#reviews');
},
error: function(data) {
alert('woops!'); //or whatever
}
});

Edit March '10

Note that with the new jqXHR object in jQuery 1.5, you can set an error handler after calling $.get:

$.get('http://example.com/page/2/', function(data){
$(data).find('#reviews .card').appendTo('#reviews');
}).fail(function() {
alert('woops'); // or whatever
});
小开

If you want a generic error you can setup all $.ajax() (which $.get() uses underneath) requests jQuery makes to display an error using $.ajaxSetup(), for example:

$.ajaxSetup({
error: function(xhr, status, error) {
alert("An AJAX error occured: " + status + "\nError: " + error);
}
});

Just run this once before making any AJAX calls (no changes to your current code, just stick this before somewhere). This sets the error option to default to the handler/function above, if you made a full $.ajax() call and specified the error handler then what you had would override the above.

小开

You can get detail error by using responseText property. 

$.ajaxSetup({
error: function(xhr, status, error) {
alert("An AJAX error occured: " + status + "\nError: " + error + "\nError detail: " + xhr.responseText);
}
});
小开

You can chain .fail() callback for error response.

$.get('http://example.com/page/2/', function(data){
$(data).find('#reviews .card').appendTo('#reviews');
})
.fail(function() {
//Error logic
})

提交答案