【发布时间】：2021-01-26 13:01:33
【问题描述】：
美好的一天。
学习网络开发并尝试制作一个按钮来折叠导航栏。检查了以前类似问题中的答案，但没有找到对我有帮助的答案。
我必须为数据目标提供 ID，在脚本中具有正确的顺序（JQuery - Popper - Bootstrap），就像我学习视频课程中的示例一样。保存它 - 点击切换图标按钮，但没有任何反应。
这是我的代码。我哪里错了？
<!DOCTYPE html>
<html lang="en">
<head>
<!-- Required meta tags always come first -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<meta http-equiv="x-ua-compatible" content="ie=edge">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="node_modules/bootstrap/dist/css/bootstrap.min.css">
<link rel="stylesheet" href="css/styles.css">
<title>Ristorante Con Fusion</title>
</head>
<body>
<nav class="navbar navbar-dark navbar-expand-sm bg-primary fixed-top">
<div class="container">
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#Navbar">
<span class="navbar-toggler-icon"></span>
</button>
<a class="navbar-brand mr-auto" href="#">Ristorante Con Fusion</a>
<div class="collapse navbar-collapse" id="#Navbar">
<ul class="navbar-nav mr-auto">
<li class="nav-item active"><a class="nav-link" href="#">Home</a></li>
<li class="nav-item"><a class="nav-link" href="./aboutus.html">About</a></li>
<li class="nav-item"><a class="nav-link" href="#">Menu</a></li>
<li class="nav-item"><a class="nav-link" href="#">Contact</a></li>
</ul>
</div>
</div>
</nav>
<header class="jumbotron">
<div class="container">
<div class="row-header">
<div class="col-12 col-sm-6">
<h1>Ristorante con Fusion</h1>
<p>We take inspiration from the World's best cuisines, and create a unique fusion experience. Our lipsmacking creations will tickle your culinary senses!</p>
</div>
<div class="col-12 col-sm">
</div>
</div>
</div>
</header>
<div class="container">
<div class="row row-content align-items-center">
<div class="col-12 col-sm-4 order-sm-last col-md-3">
<h3>Our Lipsmacking Culinary Creations</h3>
</div>
<div class="col col-sm order-sm-first col-md">
<h2>Uthappizza</h2>
<p>A unique combination of Indian Uthappam (pancake) and Italian pizza, topped with Cerignola olives, ripe vine cherry tomatoes, Vidalia onion, Guntur chillies and Buffalo Paneer.</p>
</div>
</div>
<div class="row row-content align-items-center">
<div class="col-12 col-sm-4 col-md-3">
<h3>This Month's Promotions</h3>
</div>
<div class="col col-sm col-md">
<h2>Weekend Grand Buffet</h2>
<p>Featuring mouthwatering combinations with a choice of five different salads, six enticing appetizers, six main entrees and five choicest desserts. Free flowing bubbly and soft drinks. All for just $19.99 per person </p>
</div>
</div>
<div class="row row-content align-items-center">
<div class="col-12 col-sm-4 order-sm-last col-md-3">
<h3>Meet our Culinary Specialists</h3>
</div>
<div class="col col-sm order-sm-first col-md">
<h2>Alberto Somayya</h2>
<h4>Executive Chef</h4>
<p>Award winning three-star Michelin chef with wide International experience having worked closely with whos-who in the culinary world, he specializes in creating mouthwatering Indo-Italian fusion experiences. </p>
</div>
</div>
</div>
<!-- jQuery first, then Popper.js, then Bootstrap JS. -->
<script src="node_modules/jquery/dist/jquery.slim.min.js"></script>
<script src="node_modules/popper.js/dist/umd/popper.min.js"></script>
<script src="node_modules/bootstrap/dist/js/bootstrap.min.js"></script>【问题讨论】：
标签： html bootstrap-4 navbar