testing/web-platform/tests/css/css-backgrounds/background-size-percentage-root.html


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<!doctype html>
<title>Percentage background-size on the root, when it's out-of-flow</title>
<link rel="author" href="mailto:emilio@crisal.io" title="Emilio Cobos Álvarez">
<link rel="author" href="https://mozilla.org" title="Mozilla">
<link rel="help" href="https://drafts.csswg.org/css-backgrounds/#background-size">
<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1658140">
<link rel="match" href="background-size-percentage-root-ref.html">
<style>
  :root {
    position: fixed;
    width: 100px;
    height: 50px;
    background-size: 100%;
    background-repeat: no-repeat;
    background-image: url('/images/green-100x50.png');
  }
</style>