css/css-pseudo/reference/first-letter-digraph-ref.html

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<head>
  <meta charset="utf-8">
  <title>CSS Reference: ::first-letter digraph recognition</title>
  <link rel="author" title="Jonathan Kew" href="mailto:jkew@mozilla.com">
  <style>
  div {
    font-size: 32px;
  }
  div p {
    margin: 0;
    color: lightgray;
  }
  div p span {
    color: green;
  }
  </style>
</head>
<body>
  <p>Test passes if both "I" and "J" are green in these examples:</p>
  <div lang="nl">
    <p><span>IJ</span>sselmeer</p>
    <p><span>ij</span>sselmeer</p>
    <p><span>“IJ</span>sselmeer”</p>
    <p><span>Ij</span>sselmeer</p>
  </div>
  <div lang="en">
    <p lang="nl-NL"><span>IJ</span>sselmeer</p>
    <p lang="nl-SR"><span>IJ</span>sselmeer</p>
  </div>
  <p>But only "I" should be green in these examples:</p>
  <div lang="en">
    <p><span>I</span>Jsselmeer</p>
    <p><span>i</span>jsselmeer</p>
    <p><span>“I</span>Jsselmeer”</p>
    <p><span>I</span>jsselmeer</p>
  </div>
</body>
</html>