Full page occupied by image, not just a banner separator

I'm having trouble creating a scrolling banner that blurs as you scroll. Whenever I attempt it, the image takes up the entire page background (it's positioned behind all elements but still fills the entire page). I actually want the image to be in a top section like a typical banner.

Using HTML/CSS

<div id="banner-container" object="banner" style="height: 250px; width: 100%">
<div class="banner" style="position: fixed;   background-position: center; -webkit-background-size: cover; top: 0; bottom: 0; left: 0; right: 0; z-index: -1; background-image:url('http://s6.postimg.org/d7gcsqvdt/image.jpg')"></div>
<div class="banner-blurred" style="opacity: 0; background-image:url('https://d262ilb51hltx0.cloudfront.net/fit/c/1600/1280/gradv/29/81/40/darken/50/blur/50/0*I7mXgSon9oco-rim.jpeg')"></div>

Implementing JavaScript

$(window).scroll(function() {
    var s = $(window).scrollTop(),
    opacityVal = (s / 150.0);
    $('.banner-blurred').css('opacity', opacityVal);
});
javascriptjqueryhtmlcssimage

Answer №1

If you're looking to achieve a specific effect, consider using the following code snippet:

$(window).scroll(function() {
            var scrollPos = $(window).scrollTop();
            if (scrollPos >= 100){
              $('.banner').css({'bottom':'auto', 'height' : '250px'});
            } else {
              $('.banner').css({'bottom':'0', 'height' : 'auto'});
            }
            opacityVal = (scrollPos / 150.0);
            $('.banner-blurred').css('opacity', opacityVal);
});

Based on your description (where an image fills the entire page behind all elements but you want it in a top banner), the .banner class div should remain fixed in position as id="banner-container". You can achieve this by setting the .banner class to be positioned fixed with bottom: 0. Make sure to change it to auto and add a height of 250px to match id="banner-container". The provided code will adjust the .banner css after scrolling past 100px.

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