<div class="dropdown">
<button class="btn btn-primary dropdown-toggle" type="button" data-toggle="dropdown">Dropdown Example
<span class="caret"></span></button>
<ul class="dropdown-menu">
<li><a href="#">HTML</a></li>
<li><a href="#">CSS</a></li>
<li><a href="#">JavaScript</a></li>
</ul>
</div><head>
<meta charset="UTF-8">
<title>NavigationExample1</title>
<link rel="stylesheet" href="../css/bootstrap.css">
<link rel="stylesheet" href="../css/navigation.css">
<link rel="stylesheet" href="../node_modules/fontawesome/index.js">
<script src="../js/bootstrap.js"></script>
<script src="../node_modules/jquery/dist/jquery.js"></script>
</head>
Простой
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