Equivalent to ajaxSend and/or ajaxComplete with jsonp?

问题

Right now I use:

$("#status")
    .on("ajaxSend", function() { $(this).show(); } )
    .on("ajaxComplete", function() { $(this).hide(); } );

To get a status when ajax was working. This worked with json, but not with jsonp. Is there a way to get this to work with jsonp? Thank you.

回答1:

This appears to be a bug in jQuery, or at least consideration for a bug.

Unfortunately you can't do anything about it at this point except update your jsonp requests to use the same things on beforeSend and complete:

function ajaxSend() { $("#status").show(); }
function ajaxComplete() { $("#status").hide(); }

$.ajaxSend(ajaxSend);
$.ajax({
   dataType: 'jsonp',
   beforeSend: ajaxSend,
   complete: ajaxComplete
});

回答2:

Being a relative newbie to jQuery & ajax I'm not sure if this answers your question, but I've found that event handlers inside ajaxSetup() will automatically be called for jsonp requests, whereas standalone handlers such as $(document).ajaxSend(function(event, jqXHR, settings){}); will not. And as Explosion Pills said, you can also manually override these on a per-call basis.

$.ajaxSetup({
        beforeSend: function(jqXHR, settings) {
    },
        complete: function(jqXHR, textStatus) {
    }
});

来源：https://stackoverflow.com/questions/14573522/equivalent-to-ajaxsend-and-or-ajaxcomplete-with-jsonp