borders-on-sub-unit-sized-elements.html

<!DOCTYPE html>
<html>
<title>CSS Borders: Borders appear when the element is smaller than 1/2 a pixel</title>
<link rel="author" title="Stephen Chenney" href="mailto:[email protected]">
<link rel="help" href="https://drafts.csswg.org/css-backgrounds-3/#border-width">
<link rel="match" href="reference/borders-on-sub-unit-sized-elements-ref.html">
<meta name="assert" content="Borders on elements smaller than one pixel in size
    should still appear." />
<head>
<style>
    #right {
      position: absolute;
      top: 10px;
      left: 65px;
      width: 0.25px;
      height: 50px;
      border-right: 1px dashed black;
    }
    #left {
      position: absolute;
      top: 10px;
      left: 5px;
      width: 0.25px;
      height: 50px;
      border-left: 1px dashed black;
    }
    #top {
      position: absolute;
      top: 5px;
      left: 10px;
      width: 50px;
      height: 0.25px;
      border-top: 1px dashed black;
    }
    #bottom {
      position: absolute;
      top: 65px;
      left: 10px;
      width: 50px;
      height: 0.25px;
      border-bottom: 1px dashed black;
    }
</style>
</head>
<body>
<div id="top"></div>
<div id="right"></div>
<div id="bottom"></div>
<div id="left"></div>
</body>
</html>

chromium/third_party/blink/web_tests/external/wpt/css/css-borders/borders-on-sub-unit-sized-elements.html