Ways to prevent a sticky sidebar from getting pushed down to the bottom of the page

I'm currently working on a website and would love for you to check it out at .

My goal is to create a static sidebar, and I am using the following code:

$(function() {
        var offset = $("#ad-wrapper").offset();
        var topPadding = 60;
        $(window).scroll(function() {
            if ($(window).scrollTop() > offset.top) {
                $("#ad-wrapper").stop().animate({
                    marginTop: $(window).scrollTop() - offset.top + topPadding
            });
            } else {
                $("#ad-wrapper").stop().animate({
                marginTop: 0
            });
        };
});
});

Although the sidebar appears as intended, it seems to extend into areas where it shouldn't be, such as the footer. Instead of overlapping the footer, I want it to stay positioned next to the grid.

Any help or suggestions on how to achieve this would be greatly appreciated. Thank you in advance!

javascript

Answer №1

To ensure the content div has the correct height, include the CSS property overflow:hidden in the styling for div#content.
Calculate the maximum distance the sidebar should move by adding the height of $('#content') with its offset from the top using this formula: 

$('#content').height() + $('#content').offset().top
. This is an important consideration to prevent the sidebar from exceeding this limit. Make sure to implement this validation within your scroll handler function.

Answer №2

Ensure that the sidebar stays within the boundaries of the $('#main') element by setting a maximum top margin limit.

$(function() {
    var offset = $("#ad-wrapper").offset();
    var topPadding = 60;
    $(window).scroll(function() {
        var scrollTop = $(window).scrollTop(); // Save for later use
        if (scrollTop > offset.top) {
            var newMarginTop = scrollTop - offset.top + topPadding;
            // Restrict how far the sidebar can move!
            var marginLimit = $('#main').height() + $('#main').offset().top - offset.top - $("#ad-wrapper").height();
            if (newMarginTop > marginLimit) 
                newMarginTop = marginLimit;
            $("#ad-wrapper").stop().animate({
                marginTop: newMarginTop 
            });
        } else {
            $("#ad-wrapper").stop().animate({
                marginTop: 0
            });
        }
    });
});

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