Fixed Sidebar With Relative Height And Fluid Absolute Transitioning

I am looking to achieve a fixed sidebar that will scroll to the bottom of the div and then will change into an absolutely positioned element in order to stop it continuing down the

Solution 1:

I amended this by editing the code used for calculating the scroll distance:

$(window).bind('scroll', function() {
    if($(window).scrollTop() >= offsetHeight - 100) {
        $('.sidebar-wrap').addClass('scroll');
    } else {
        $('.sidebar-wrap').removeClass('scroll');
    }
});

Because we already know the offsetHeight is equal to that of the sidebar height, I then messed around with subtracting values until it was fluent. If you was to use this code I believe you would have to change the value of - 100 in order to make it work.

EDIT: I made it all into 1 function and enabled everything to update on window resize which also only fires once the resize is complete.

<scripttype="text/javascript">

$(document).ready(function() {

    functionupdateScroll() {

        var offsetHeight = document.getElementById('main-column').offsetHeight;
        document.getElementById('main-sidebar').style.height = offsetHeight+'px';

        $(window).bind('scroll', function() {
            if($(window).scrollTop() >= offsetHeight - 100) {
                $('.sidebar-wrap').addClass('scroll');
            } else {
                $('.sidebar-wrap').removeClass('scroll');
            }
        });
    }

        $(window).resize(updateScroll).trigger('resize')
    });
</script>