<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>
<div id="demo" class="carousel slide" data-ride="carousel">
<ul class="carousel-indicators">
<li data-target="#demo" data-slide-to="0" class="active"></li>
<li data-target="#demo" data-slide-to="1"></li>
<li data-target="#demo" data-slide-to="2"></li>
<div class="carousel-inner">
<div class="carousel-item active">
<img src="https://static.jyshare.com/libs/images/mix/img_fjords_wide.jpg">
<div class="carousel-item">
<img src="https://static.jyshare.com/libs/images/mix/img_nature_wide.jpg">
<div class="carousel-item">
<img src="https://static.jyshare.com/libs/images/mix/img_mountains_wide.jpg">
<a class="carousel-control-prev" href="#demo" data-slide="prev">
<span class="carousel-control-prev-icon"></span>
<a class="carousel-control-next" href="#demo" data-slide="next">
<span class="carousel-control-next-icon"></span>
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