具体化导航栏下拉菜单不起作用



由于某种原因,本节中显示的下拉列表不起作用。 https://materializecss.com/navbar.html#! 控制台中没有错误,它只是不起作用,我已经研究并尝试了几种解决方案,我找到了 github 和 codepen,但似乎没有什么可以解决它,可能是由库版本引起的吗?我该怎么办?这是我的代码

<!-- Dropdown Structure -->
<ul id="dropdown1" class="dropdown-content">
<li><a href="#!">one</a></li>
<li><a href="#!">two</a></li>
<li class="divider"></li>
<li><a href="#!">three</a></li>
</ul>
<nav>
<div class="nav-wrapper">
<a href="#!" class="brand-logo">Logo</a>
<ul class="right hide-on-med-and-down">
<li><a href="sass.html">Sass</a></li>
<li><a href="badges.html">Components</a></li>
<!-- Dropdown Trigger -->
<li><a class="dropdown-trigger" href="#!" data-target="dropdown1">Dropdown<i class="material-icons right">arrow_drop_down</i></a></li>
</ul>
</div>
</nav>

和调用 jquery 后的脚本

$(document).ready(function(){
$(".dropdown-trigger").dropdown();
});

$(".dropdown-trigger").dropdown();
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/materialize/1.0.0-beta/css/materialize.min.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/materialize/1.0.0-beta/js/materialize.min.js"></script>
<ul id="dropdown1" class="dropdown-content">
<li><a href="#!">one</a></li>
<li><a href="#!">two</a></li>
<li class="divider"></li>
<li><a href="#!">three</a></li>
</ul>
<nav>
<div class="nav-wrapper">

<ul class="left ">
<!-- Dropdown Trigger -->
<li><a class="dropdown-trigger" href="#!" data-target="dropdown1">Dropdown</a></li>
</ul>
</div>
</nav>

链接

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/materialize/1.0.0-beta/css/materialize.min.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/materialize/1.0.0-beta/js/materialize.min.js"></script>

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