问多个ajax和非ajax函数后的回调

EN

var xhr = ajax();
var images_promise = loadImages();

$.when.apply($, [xhr, images_promise]).done(function () {
    // something to do when both are complete
});

function ajax() { 
    return $.ajax({
        // ajax configuration
    });
}

function loadImages() { 
    // create the deferred promise object
    var dfd = new jQuery.Deferred();
    $("img").on('load', function() { 
        // on the load event resolve the promise
        dfd.resolve();
    });
    return dfd;
}