当我缩小窗口并单击按钮时，它不起作用。按钮不响应。似乎是这里的问题，有人可以告诉我吗？
<body>
<div class="container">
<header>
<nav class="navbar navbar-expand-lg navbar-light bg-light">
<a class="navbar-brand" href="#">Nature</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarSupportedContent">
<ul class="navbar-nav ml-lg-auto">
<li class="nav-item active">
<a class="nav-link" href="#home">Home<span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a class="nav-link" href="#explore">Explore</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#adventure">Adventure</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#blogs">Blogs</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#contact">Contact</a>
</li>
</ul>
</div>
</nav>
</header>
</body>