我将所有CSS和Javascript都放在Django的HTML文件中，如下所示：
<!doctype html>
<html lang="en">
<head>
<title>Dashboard</title>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<script>
function toggleSidebar(){
document.getElementsByClassName("sidebar");
}
</script>
<style type="text/css">
.toggle-btn {
position:absolute;
left:180px;
top:70px
}
.toggle-btn span {
display:block;
width:30px;
height:5px;
background:#000000;
margin: 5px 0px;
}
.sidebar {
height:100%;
width:160px;
position: fixed;
z-index:1;
top:0;
let:0;
background-color:#111;
overflow-x: hidden;
padding-top:70px;
}
.sidebar.active {
left:0px
}
.sidebar a {
padding:6px 8px 6px 16px;
text-decoration: none;
font-size:18px;
color: #818181;
display:block;
}
.sidebar a:hover {
color:#ffffff;
}
</style>
</head>
<body>
<!-- Optional JavaScript -->
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
<div class="toggle-btn">
<span></span>
<span></span>
<span></span>
</div>
<div class="sidebar">
<a href="/categories">Categories</a>
<a href="#">Test 1</a>
<a href="#">Test 2</a>
<a href="#">Test 3</a>
<a href="#">Test 4</a>
</div>
</body>
<header class="site-header">
<nav class="navbar navbar-expand-md navbar-dark bg-steel fixed-top">
<div class="container">
<a class="navbar-brand mr-4" href="#">Home.com</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarToggle" aria-controls="navbarToggle" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarToggle">
<div class="navbar-nav mr-auto">
</div>
<!-- Navbar Right Side -->
<div class="navbar-nav">
<a class="nav-item nav-link" href="#">Logout</a>
</div>
</div>
</div>
</nav>
<section class="hero">
<div class="hero-inner">
<h1>Centered Text</h1>
</div>
</section>
</header>
</body>
</html>
[我想切换侧边栏，这意味着当有人单击spann标签指示的汉堡菜单时，将触发隐藏功能，您可能会通过以下方式看到此信息：
<script>
function toggleSidebar(){
document.getElementsByClassName("sidebar");
}
</script>
到目前为止，它还无法正常运行，因为我绝对是CSS和Javascript的初学者。如果有人能指出我做错的事情，我将非常感激。
在CodePen中
我可以修复切换功能，希望对您有所帮助：
function toggleSidebar() {
var x = document.getElementsByClassName("sidebar")[0];
if(x.classList.contains('active')) {
x.classList.remove('active')
return;
}
x.classList.add('active')
}
如果您检查侧边栏div，您将看到该类已在toogle中添加和删除