用于模态弹出窗口的 SlideUp Jquery

Question

I have created an email subscription popup modal. Right now I have the modal set to fade in but instead of that I want the modal to slide up from bottom of the page to the top. I tried slideUp() instead of fadeIn() but it does not work. I feel like I am missing something. Do I need to create another function for the slideUp() ? It is a popup modal so it is ready when the window scrolls instead of on a click event. Any help is appreciated. Thank you. My code is below.

$(document).scroll(function() {
    if (!$("#mc_embed_signup").data("userClosed")) {
        $(".popup-close").click(function(e) {
            closeSPopup(e);
        });

        var a = $(this).scrollTop();
        if (a > 400) {
            $("#mc_embed_signup").slideUp(600);
        }
    }
});

function closeSPopup(e) {
    e.preventDefault();
    $("#mc_embed_signup").data("userClosed", true);
    $("#mc_embed_signup").hide();
}

Answer 1

jQuery .slideUp() hides the matched elements with a sliding motion . If you want to slide your popup up, you could use .animate()

 $("#popup").show().animate({top: (window.innerHeight / 2 - 50) + "px"}, 1000);

 #popup { display: none; width: 200px; height: 100px; position: fixed; top: 100%; left: calc(50% - 100px); background-color:cyan; }

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <div id="popup"><div>

Answer 2

.slideDown() should be used, but!.. instead of using top: NN in CSS use the bottom: NN . This way the element "anchors" to it's bottom property, and the .slideDown() will perform from bottom to top!

 var $popup = $("#popup"); $popup.slideDown();

 #popup { position: absolute; transform: translate(-50%, 0); bottom: 24px; /* don't use top. Use bottom */ left:50%; width: 300px; height: 160px; background:red; display: none; }

 <div id="popup">Popup ou yeah</div> <script src="//ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>