testing/web-platform/tests/css/css-text-decor/text-decoration-subelements-001.html


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<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>Test case for text-decoration with subelements</title>
    <meta name="assert" content="for underlines and overlines the UA must use a single thickness and position on each line for the decorations deriving from a single decorating box">
    <link rel="author" title="Jonathan Kew" href="mailto:jkew@mozilla.com">
    <link rel="author" title="Mozilla" href="https://www.mozilla.org">
    <link rel="help" href="https://drafts.csswg.org/css-text-decor-3/#text-underline-position-property">
    <link rel="mismatch" href="reference/text-decoration-subelements-001-notref.html">
    <style>
      p {
        margin: 0;
        padding: 1em;
      }
      div.wrapper {
        font-size: 2em;
        text-decoration: underline;
      }
    </style>
  </head>
  <body>
    <p>Test passes if there is a single uniform underline for all the text in each line,
      <i>not</i> a separate underline for the superscripts:
    </p>
    <div class=wrapper>
      <p>Einstein said that <i>e = mc<sup>2</sup></i>.<br></p>
      <p>Is <i>a<sup>n</sup> + b<sup>n</sup> = c<sup>n</sup></i> ever true for <i>n</i> &gt; 2?</p>
    </div>
  </body>
</html>