<title>Bootstrap 实例</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://cdn.staticfile.net/twitter-bootstrap/4.3.1/css/bootstrap.min.css">
<script src="https://cdn.staticfile.net/jquery/3.2.1/jquery.min.js"></script>
<script src="https://cdn.staticfile.net/popper.js/1.15.0/umd/popper.min.js"></script>
<script src="https://cdn.staticfile.net/twitter-bootstrap/4.3.1/js/bootstrap.min.js"></script>
<a href="#" title="Header" data-toggle="popover" data-trigger="hover" data-content="一些内容">鼠标移动到我这</a>
$(document).ready(function(){ $('[data-toggle="popover"]').popover(); 
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