Bootstrap .btn-primary类

!DOCTYPE htmlhtmlheadtitleBootstrap Example/titlemeta name=viewport content=width=device-width, initial-scale=1

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<!DOCTYPE HTML>
<HTML>
<head>
<Title>bootstrap Example</Title>
<Meta name="vIEwport" content="wIDth=device-wIDth, initial-scale=1">
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/CSS/bootstrap.min.CSS">
<script src="https://AJAX.GoogleAPIs.com/AJAX/libs/jquery/3.3.1/jquery.min.Js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/Js/bootstrap.min.Js"></script>
</head>
<body>
<button type = "button" class = "btn btn-primary">Primary button</button>
</body>
</HTML>

本文标题为:Bootstrap .btn-primary类

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