场景
有时发送的请求太多没有返回，为了终止之前发送的请求。也可以设置请求的超时时间
$.xhrPool = [];
$.xhrPool.abortAll = function() {
$(this).each(function(idx, jqXHR) {
jqXHR.abort();
});
$.xhrPool = [];
};
$.ajaxSetup({
beforeSend: function(jqXHR) {
$.xhrPool.push(jqXHR);
},
complete: function(jqXHR) {
var index = $.xhrPool.indexOf(jqXHR);
if (index > -1) {
$.xhrPool.splice(index, 1);
}
}
});
// Everything below this is only for the jsFiddle demo
$('#cancelBtn').click(function() {
$.xhrPool.abortAll();
});