编程学习网为您整理以下代码实例，主要实现：Bootstrap <small>元素，希望可以帮到各位朋友。
<!DOCTYPE HTML>
<HTML>
<head>
<Title>bootstrap small element</Title>
<Meta name = "vIEwport" content = "wIDth = device-wIDth, initial-scale = 1">
<link rel = "stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/CSS/bootstrap.min.CSS">
<script src = "https://AJAX.GoogleAPIs.com/AJAX/libs/jquery/3.3.1/jquery.min.Js"></script>
<script src = "https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/Js/bootstrap.min.Js"></script>
</head>
<body>
<h1>heading One
<small>I'm secondary heading</small>
</h1>
<h2>heading One
<small>I'm secondary heading</small>
</h2>
</body>
</HTML>
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