The following code applies to the Divi WordPress theme by Elegant Themes.
The effect is to have a transparent menu over a full screen slider and then turn the menu semi-opaque when the use scrolls the page.
See an example here: http://southcoastjazz.co.uk/
This is a modification of Geno Quiroz’s tutorial (http://quiroz.co/ghost-home-page-and-change-menu-background/) as well as Vlad Patrascu’s tutorial (http://wpdots.com/cover-slider/)
[1] Add this to: ‘Divi Theme Options’ -> ‘Integration’ -> ‘Add code to the < head > of your blog’
<script type="text/javascript">
(function($) {
var cover_section = '#cover-section', top_header = '#top-header, #et-secondary-nav', header = '#main-header';
$(window).bind('scroll', function() {
if ($(window).scrollTop() > 0) {
$(header).addClass('opaque-header');
$(header).removeClass('transparent-header');
$(top_header).addClass('opaque-header');
$(top_header).removeClass('transparent-header');
} else {
$(header).removeClass('opaque-header');
$(header).addClass('transparent-header');
$(top_header).removeClass('opaque-header');
$(top_header).addClass('transparent-header');
}
});
$(document).ready(function() {
top_header = '#top-header, #et-secondary-nav';
header = '#main-header';
$(header).addClass('transparent-header');
$(top_header).addClass('transparent-header');
if ($(cover_section).length) $('body').addClass('cover-active');
});
$(window).load(function() {
if ($(cover_section).length) set_viewport_height($(cover_section));
});
$(window).resize(function() {
if ($(cover_section).length) set_viewport_height($(cover_section));
});
function set_viewport_height(element) {
var viewport_height = $(window).height();
if ($('#wpadminbar').length) var viewport_height = viewport_height - $('#wpadminbar').innerHeight();
$(element).height(viewport_height); };
})(jQuery);
</script>
<script type="text/javascript">
(function($) {
$(window).load(function() {
$('#divi-loading').fadeOut(500);
});
})(jQuery); </script>
[2] Add these to style.css (or Custom CSS in your Divi Epanel)
.opaque-header {
background-color: rgba(31,31,31,0.8) !important;
box-shadow: 0 1px 0 rgba(0, 0, 0, 0.0);
-moz-box-shadow: 0 1px 0 rgba(0, 0, 0, 0.0);
-webkit-box-shadow: 0 1px 0 rgba(0, 0, 0, 0.0);
}
.transparent-header {
background-color: rgba(255, 255, 255, 0.0) !important;
box-shadow: 0 0 0 rgba(0, 0, 0, 0) !important;
}
/* Thanks to Vlad Patrascu for the remaining CSS code */
/* Set all this elements to 100% height, very important! */
/* Set all this elements to 100% height, very important! */
.cover-active, .cover-active #page-container, .cover-active #et-main-area, .cover-active #main-content, .cover-active article.page, .cover-active .entry-content, .cover-active #cover-section .et_pb_slider, .cover-active #cover-section .et_pb_slides, .cover-active #cover-section .et_pb_slide, .cover-active #cover-section .et_pb_container {
min-height: 100%;
height: 100%;
padding: 0!important;
}
/* Set position to initial when boxed layout is set, fixes header position */
.cover-active.et_boxed_layout #page-container {
position: initial!important;
}
/* Prepare slide container for slide description vertical align */
.cover-active #cover-section .et_pb_container {
display: table;
}
/* Align the description on middle vertically (correctly) */
.cover-active #cover-section .et_pb_slide_description {
padding: 0;
display: table-cell;
vertical-align: middle;
}
/* Move dot controllers, in case they are used */
.cover-active #cover-section .et-pb-controllers {
bottom: 100px;
}
[3] Full Width Section Module settings
Css ID: cover-section Add a full width slider.