代码编辑器：
x
1
<meta name="viewport" content="width=device-width, initial-scale=1">2
<link rel="stylesheet" href="/static/lib/bootstrap/4.0.0/css/bootstrap.min.css">3
<script src="/static/lib/jquery/3.3.1/jquery.min.js"></script>4
<script src="/static/lib/popper.js/1.12.9/umd/popper.min.js"></script>5
<script src="/static/lib/bootstrap/4.0.0/js/bootstrap.min.js"></script>6
<body style="height:1500px">7
<nav class="navbar navbar-expand-sm bg-dark navbar-dark fixed-bottom">8
<a class="navbar-brand" href="#">9
<img src="/static/icon/bootstrap_32x32.png" alt="Logo" style="width:32px;" />10
</a>11
<ul class="navbar-nav">12
<li class="nav-item">13
<a class="nav-link" href="#">首页</a>14
</li>15
<li class="nav-item">16
<a class="nav-link" href="#">Python</a>17
</li>18
<li class="nav-item">