I'd like to have some css or other technique that let's me vertically fade the contents of a div from normal appearance at the top to completely white (or whatever color) at the bottom. Not an animation, just a static effect.
I have found ways to fade a background, e.g. Colorzilla's Gradient Editor
But I would like this effect to apply to all contents of a div (text, images, etc.), like an overlay. If I have to make it fixed width, that is possible. If I really have to fix the vertical height, that could be hacked somehow I guess. I would prefer it to be flexible in the width and height.
You can do this with CSS (without an image or extra markup) using a ::before
pseudo-element for the overlay, and linear-gradient
for the fade with rgba()
opacity from 0
to 1
. This assumes you don't need to click on the elements in the <div>
individually, since the overlay prevents that.
Demo: http://jsfiddle.net/ThinkingStiff/xBB7B/
Output:
CSS:
#overlay {
position: relative;
}
#overlay::before {
background-image: linear-gradient( top,
rgba( 255, 255, 255, 0 ) 0%,
rgba( 255, 255, 255, 1 ) 100% );
background-image: -moz-linear-gradient( top,
rgba( 255, 255, 255, 0 ) 0%,
rgba( 255, 255, 255, 1 ) 100% );
background-image: -ms-linear-gradient( top,
rgba( 255, 255, 255, 0 ) 0%,
rgba( 255, 255, 255, 1 ) 100% );
background-image: -o-linear-gradient( top,
rgba( 255, 255, 255, 0 ) 0%,
rgba( 255, 255, 255, 1 ) 100% );
background-image: -webkit-linear-gradient( top,
rgba( 255, 255, 255, 0 ) 0%,
rgba( 255, 255, 255, 1 ) 100% );
content: "\00a0";
height: 100%;
position: absolute;
width: 100%;
}
HTML:
<div id="overlay">
<span>some text</span><br />
<img src="http://thinkingstiff.com/images/matt.jpg" width="100" /><br />
<p>some more text</p>
</div>
I would create a transparent PNG that fades from white to transparent. Like this: http://cl.ly/2i3x1Y3k0N181f3N1w0l
You can then use CSS to place this over the content.
.fadeDiv {
position:absolute;
width:100%;
bottom:0;
background:url(fadeImg.png) repeat-x 0 0;
}
Alternatively, you can use a CSS3 gradient background in lieu of an image.
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