outline-015.html
<!doctype html>
<html lang=en>
<meta charset=utf-8>
<title>CSS-UI test: outline-offset width negative values — long box</title>
<link rel="author" title="Florian Rivoal" href="http://florian.rivoal.net">
<meta name=flags content="should">
<meta name=assert content="Negative values on outline-offset should not cause the height and the width of outside of the shape drawn by the outline to become smaller than twice the computed value of the outline-width property, applying this constrain independenly in each direction.">
<link rel="match" href="../reference/ref-filled-green-100px-square.xht">
<link rel=help href="https://drafts.csswg.org/css-ui-3/#outline-props">
<style>
div {
width: 100px;
height: 100px;
/* The borders makes the box rectangular rather than square */
border-top: solid white 50px;
border-bottom: solid white 50px;
background: red;
outline: solid 50px green;
outline-offset: -100px;
margin-top: -50px;
}
</style>
<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
<div></div>