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<title>CSS Backgrounds and Borders Test: background-size with <percent> value and 'auto' and image with no intrinsic size and no intrinsic ratio</title>
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Credit should go to Henrik Andersson
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<link rel="author" title="GĂ©rard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/">
<link rel="help" href="http://www.w3.org/TR/css3-background/#the-background-size">
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[css-backgrounds] [css-images] Interop for sizing gradients with only width
http://lists.w3.org/Archives/Public/www-style/2017Apr/0029.html
Issue 935057: background-size with only one [ <length | <percent> ] value with SVG image with no intrinsic ratio incorrect
https://bugs.chromium.org/p/chromium/issues/detail?id=935057
Bug 170834: background-size with 2nd value is 'auto' and the image has no intrinsic size and no intrinsic ratio incorrectly rendered
https://bugs.webkit.org/show_bug.cgi?id=170834
-->
<link rel="match" href="reference/background-size-041-ref.html">
<meta content="This test checks that when one 'background-size' is 'auto' and the image has no intrinsic size and no intrinsic ratio, then it should use 100%. In this test, the 'auto' value should use 100% of the height of the background positioning area of the div, which is 400px." name="assert">
<style>
div
{
background-clip: border-box;
background-image: linear-gradient(orange, blue);
background-origin: content-box;
background-position: center;
background-repeat: no-repeat;
background-size: 50% auto;
border: solid 40px;
border-color: transparent black;
height: 400px;
width: 400px;
}
</style>
<div></div>