Примеры для jQuery Селектор :first-of-type

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Find the first span in each matched div and add a class to it.

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<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>first-of-type demo</title>
  <style>
  span.fot {
    color: red;
    font-size: 120%;
    font-style: italic;
  }
  </style>
  <script src="https://code.jquery.com/jquery-1.10.2.js"></script>
</head>
<body>
 
<div>
  <span>Corey,</span>
  <span>Yehuda,</span>
  <span>Adam,</span>
  <span>Todd</span>
</div>
<div>
  <b>Nobody,</b>
  <span>Jörn,</span>
  <span>Scott,</span>
  <span>Timo</span>
</div>
 
<script>
$( "span:first-of-type" ).addClass( "fot" );
</script>
 
</body>
</html>

Демонстрация: