我在CodePen https://codepen.io/anon/pen/qydVKY#anon-signup上有此页面，我试图在其中将切换开关图标重新定位到右侧。但是，看来navbar-toggler-right不起作用，或者我使用的方式不正确。
此外，我想重新定位单击切换按钮时显示的菜单。我一天中大部分时间都在尝试此操作，但无法弄清楚。
HTML和CSS如下：
body {
padding-top: 1em;
}
@media (min-width: 1200px) {
.container {
max-width: 1200px;
}
}
#logo {
float: left;
}
.cs-navbar {
margin-left: 40px;
font-family: 'Cairo', sans-serif;
font-size: 20px;
}<html lang="en">
<head>
<!-- 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://stackpath.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" integrity="sha384-WskhaSGFgHYWDcbwN70/dfYBj47jz9qbsMId/iRN3ewGhXQFZCSftd1LZCfmhktB" crossorigin="anonymous">
<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet">
<link href="https://fonts.googleapis.com/css?family=Cairo" rel="stylesheet">
<link rel="stylesheet" href="css/bootstrap-custom.css">
<title>My Site</title>
</head>
<body>
<header class="container">
<div id="logo">
<object type="image/svg+xml" data="img/logo.svg" height="60px">
Your browser does not support SVG
</object>
</div>
<nav class="navbar navbar-expand-lg navbar-light">
<!-- <a class="navbar-brand" href="#">Expand at md</a> -->
<button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#main-navbar" aria-controls="main-navbar" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="main-navbar">
<ul class="navbar-nav mr-auto cs-navbar">
<li class="nav-item active">
<a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" id="dropdown04" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Chapters</a>
<div class="dropdown-menu" aria-labelledby="dropdown04">
<a class="dropdown-item" href="#">Chapter 1</a>
<a class="dropdown-item" href="#">Chapter 2</a>
<a class="dropdown-item" href="#">Chapter 3</a>
<a class="dropdown-item" href="#">Chapter 4</a>
<a class="dropdown-item" href="#">Chapter 5</a>
<a class="dropdown-item" href="#">Chapter 6</a>
</div>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Bookmarks</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Table of Contents</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Index</a>
</li>
</ul>
<!-- <form class="form-inline my-2 my-md-0">
<input class="form-control" type="text" placeholder="Search">
</form> -->
</div>
</nav>
</header>
<!-- Optional JavaScript -->
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js" integrity="sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js" integrity="sha384-smHYKdLADwkXOn1EmN1qk/HfnUcbVRZyYmZ4qpPea6sjB/pTJ0euyQp0Mk8ck+5T" crossorigin="anonymous"></script>
</body>
</html>