Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial


Why is my code behaving like this?

Hi there. I am trying to do an effect where the menu bar gets carried with the screen as the user scrolls. http://blueprint.pixelblvd.com/

Here is my code:

                    var offset = $('#main-nav').offset();
                      if($(document).scrollTop() < 602){

             <!-- NAVIGATION SCROLLER CODE -->

            <div id="nav_container">
                <nav id="main-nav">
                    <div class="wrap">
                        <a href="/"><div id="logo_mark"></div></a>
                        <div id="nav_link"><a href="#navslide">Menu</a></div>
                        <ul id="navslide">
                            <li><a href="about.php">About</a></li>
                            <li><a href="#">blog</a></li> 
                            <li><a href="services.php">Services</a></li>
                            <li><a href="contact.php">Contact</a></li>              
                            <li><a href="faq.php">FAQ</a></li>

And my CSS:

            #main-nav {
            background: #eeeeee;
            padding: 0;
            height: 4em;
            z-index: 999;
            width: 100%;

            #nav_link {
            display: none;

            #main-nav ul {
            line-height: 4.7em;
            position: absolute;
            right: 0;
            display: inline-block;
            font-size: 1em;
            letter-spacing: .1em;
            font-weight: 100;
            text-align: left;
            text-transform: uppercase;
            vertical-align: top;

            #main-nav ul a {
            color: #333;
            text-decoration: none;
            margin: 0 1em;
            padding-bottom: 5px;

            #main-nav li {
            line-height: 1em;
            display: inline-block;

            #nav_link a {
            display: block;
            text-indent: -999px;

            .fixed-nav {
              width: 100%;
              position: fixed;
              top: 0;
              left: 0;

            .fixed-nav #logo_mark{
                display: inline-block;

            #logo_mark {
            display: none;
            width: 223px;
            height: 36px;
            background-image: url('images/menu.png');
            background-size: 100%;
            margin-left: 25px;
            margin-top: 15px;

I am not sure why when you scroll past 602 pixels it is making that jump?

Thanks for your help

1 Answer

Samuel Wambach
Samuel Wambach
3,606 Points

When the nav becomes fixed, it is removed from the flow of the page, causing that skip. Your nav_container needs to set the height of the nav bar. That way, when the nav bar becomes fixed, the container maintains the height.

Thanks so much! I was pulling my hair out over that!!!