Prevent fixed div from overlapping with footer

I have been trying to find a solution for my fixed div that sticks to the bottom, but nothing seems to work.

My goal is to have the div stop when it reaches the #footer section of the page.

Visit the site

The CSS currently in place gives the div the class .widget.widget_nav_menu. I need a script that can change this class to .widget.widget_nav_menu.fixed_button when it reaches the border of the footer. Is this feasible?

.widget.widget_nav_menu{
  background: none repeat scroll 0 0 #2E3337;
  bottom: 0;
  padding: 25px;
  position: fixed;
  right: 2%;
  color: #707480;
    font-size: 0.8em;
    opacity: 1;
    text-transform: uppercase;
}
.widget.widget_nav_menu.fixed_button {
  margin-right: -210px;
  position: absolute !important;
  top: -180px;
  background: none repeat scroll 0 0 #2E3337;
  padding: 25px;
  right: 2%;
}
jqueryhtmlcss

Answer №1

If you're wondering whether JavaScript can determine if a page has reached the bottom, StackOverflow has some helpful answers on this topic:

  • Determining when JavaScript scrolled bottom of page
  • How to Detect if browser window is scrolled to bottom

By following the suggestions in those answers, you can easily update the CSS Class once the bottom of the page is reached:

<script>
$(function() {
    $(window).scroll(function(){

       //Cache the Footer Widget
       var $footerMenu = $('.widget.widget_nav_menu');

       //Check if it hits the bottom, toggle Relevant Class.
       if ((window.innerHeight + window.scrollY) >= document.body.offsetHeight)
          $footerMenu.addClass('fixed_button');
       else
          $footerMenu.removeClass('fixed_button');

    });
});
</script>

Demo Fiddle: http://jsfiddle.net/fVKZe/1/

To implement this functionality in WordPress, you'll need to create a custom JavaScript file and enqueue it with jQuery loaded as a dependency.

stickymenu.js 

jQuery(document).ready(function($) {
    $(window).scroll(function(){
        //The Above Footer Widget Code
    });
});

functions.php

function stickyfooter_method() {
    wp_enqueue_script(
        'stickymenu',
         get_stylesheet_directory_uri() . '/js/stickymenu.js',
         array( 'jquery' )
    );
}

add_action( 'wp_enqueue_scripts', 'stickyfooter_method' );

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