Is there a CSS-based solution to create an overlay that remains visible even when the page is scrolled down? I want to use this overlay behind a popup. Using JavaScript to set the height of the overlay based on the page's content is one option, but I'm wondering if there is a pure CSS solution available.
#overlay{
width: 100%;
height: 100%;
position: absolute;
left: 0px;
top: 0px;
background-color:#000;
opacity: .75
}
To make the change, simply switch the position property to fixed.
-webkit-background-size: cover;
-moz-background-size: cover;
-o-background-size: cover;
background-size: cover;
position: relative;
Give it a try! While this code is primarily for backgrounds, it's worth experimenting with on other elements as well!
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