javascript - How to build simple sticky navigation with jQuery?

Question

I'm trying to change the css of a div when scrolling. This is my code but unfortunately it won't work.

$(document).ready(function() {
   $(window).scroll(function () {
        if ($(this).scrollTop() > 150) {
            $('#subnav').css({
                'position' : 'fixed',
                'top' : '0'
            });
        } else {
            $('#subnav').css({
                'position' : 'static',
                'top' : 'auto'
            });
        }
    });
 });

Answer 1

Try this:

Here is working jsFiddle

$(document).ready(function() {
   $(window).scroll(function() {
       var scrollVal = $(this).scrollTop();
        if ( scrollVal > 150) {
            $('#subnav').css({'position':'fixed','top' :'0px'});
        } else {
            $('#subnav').css({'position':'static','top':'auto'});
        }
    });
 });

Note: If you have just one value you can use else, but if you have multiple values i suggest to not use else, because it creates conflict, use else if intead.