Q:

HTML, CSS: How do I stretch an element up to the edge of the page?

I have an absolutely positioned element with a background image that must appear as a small, horizontal strip reaching up to the edge of the browser window without needing a scrollbar.  How could I do this?

A:

Set both left and right CSS properties to 0.
Kickoff example:
<!DOCTYPE html>
<html lang="en">
    <head>
        <title>SO question 4535198</title>
        <style>
            #strip {
                position: absolute;
                top: 0;
                left: 0;
                right: 0;
                height: 2px;
                background-image: url('some.png');
            }
        </style>
    </head>
    <body>
        <div id="strip"></div>
    </body>
</html>

