我正在尝试从ul和li嵌套元素列表中制作可折叠/可扩展的菜单树。
“ section”类的元素只是文件夹，而“ documents”类的元素是文件。
我尝试了Internet上的4到5种不同的方法，包括纯CSS和jQuery，但是我无法使它们起作用。
现在我正在尝试使用以下脚本：https://www.jqueryscript.net/layout/Animated-Tree-View-Plugin-For-jQuery-Bootstrap-3-MultiNestedLists.html
可悲的是，我对此再也没有运气了，正如您在此JSFiddle上看到的那样
你知道我在哪里做错了吗？也许使用了错误的选择器？
非常感谢您的帮助。
顺便说一句，这部分可以在我的计算机上使用，而在JSFiddle上似乎不可用：
jQuery(document).ready(function() {
jQuery('li').each(function() {
var $this = jQuery(this);
if($this.html().replace(/\s| /g, '').length == 0) {
$this.remove();
}
});
});
答案 0 :(得分：0)
您的问题在代码的这一部分：
$this.html()
这样，您将获得html而不是文本，并且该文本永远不会为空。改用：
if(this.textContent.replace(/\s| /g, '').length == 0) {
jQuery(this).remove();
}
您更新的fiddle
相反，如果您需要绘制文件夹/文件，则足以将第一个 multi-nested-list 类别添加到第一个ul中，而无需js代码，如以下代码段所示。< / p>
请记住：在第一个ul之后，所有接下来的ul需要包装成li。我只翻译了html的第一部分。
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="http://netdna.bootstrapcdn.com/font-awesome/4.1.0/css/font-awesome.min.css">
<link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/olivsamuk/MultiNestedLists@master/style.css">
<script src="https://cdn.jsdelivr.net/gh/olivsamuk/MultiNestedLists@master/MultiNestedList.js"></script>
<div class="table">
<ul class="multi-nested-list">
<li><a>Preface, revisions, and safety</a>
<ul class="section">
<li><a>Preface</a>
<ul class="section">
<li><a> </a>
<ul class="section">
<li><a> </a>
<ul class="section">
<li><a> </a></li>
<li><a class="document">Service documentation</a></li>
<li><a class="document">About this documentation</a></li>
<li><a class="document">About this product</a></li>
<li><a class="document">Training</a></li>
<li><a class="document">Trademarks</a></li>
<li><a class="document">Contact</a></li>
<li><a class="document">Feedback</a></li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
<ul class="section">
<li><a>Revisions</a>
<ul class="section">
<li><a>Service documentation</a>
<ul class="section">
<li><a> </a>
<ul class="section">
<li><a> </a></li>
<li><a class="document">Version 1.0</a></li>
</ul>
</li>
</ul>
</li>
<ul class="section">
<li><a>Revision history</a>
<ul class="section">
<li><a> </a></li>
<li><a class="document">Version 0.0</a></li>
</ul>
</li>
</ul>
</ul>
</li>
</ul>
<ul class="section">
<li><a>Safety</a>
<ul class="section">
<li><a> </a>
<ul class="section">
<li><a> </a>
<ul class="section">
<li><a> </a></li>
<li><a class="document">Introduction</a></li>
<li><a class="document">About safety classifications</a></li>
<li><a class="document">About additional information</a></li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
<ul class="section">
<li><a>List of WARNING messages</a>
<ul class="section">
<li><a> </a>
<ul class="section">
<li><a> </a></li>
<li><a class="document">About biohazardous material</a></li>
<li><a class="document">About chemical reaction producing toxic gas</a></li>
<li><a class="document">About class 2 laser radiation</a></li>
<li><a class="document">About class 2M laser radiation</a></li>
<li><a class="document">About class 3B laser radiation</a></li>
<li><a class="document">About consumables</a></li>
<li><a class="document">About disposal of instruments, control units or parts</a></li>
<li><a class="document">About electric ground</a></li>
<li><a class="document">About electrical hazards</a></li>
<li><a class="document">About electromagnetic interference</a></li>
<li><a class="document">About environmental conditions</a></li>
<li><a class="document">About fire and burns</a></li>
<li><a class="document">About moving parts</a></li>
<li><a class="document">About optical or ultra violet radiation</a></li>
<li><a class="document">About power interruption</a></li>
<li><a class="document">About reagents and working solutions</a></li>
<li><a class="document">About sharp objects</a></li>
<li><a class="document">About sharp points</a></li>
<li><a class="document">About spare parts</a></li>
<li><a class="document">About strong magnetic field</a></li>
<li><a class="document">About the control unit</a></li>
</ul>
</li>
</ul>
</li>
</ul>
<ul class="section">
<li><a>List of CAUTION messages</a>
<ul class="section">
<li><a> </a>
<ul class="section">
<li><a> </a>
<li><a class="document">About bridged lock sensors</a></li>
<li><a class="document">About heavy objects</a></li>
<li><a class="document">About hot surfaces</a></li>
<li><a class="document">About slippery surfaces due to condensation</a></li>
<li><a class="document">About software and data security</a></li>
<li><a class="document">About system cleaner</a></li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
<ul class="section">
<li><a>List of NOTICE messages</a>
<ul class="section">
<li><a> </a>
<ul class="section">
<li><a> </a></li>
<li><a class="document">About circuit breakers and fuses</a></li>
<li><a class="document">About electrostatic sensitive devices (ESD)</a></li>
<li><a class="document">About sprays</a></li>
<li><a class="document">About system cleaner replacement</a></li>
<li><a class="document">About wireless interference</a></li>
</ul>
</li>
</ul>
</li>
</ul>
<ul class="section">
<li><a>About decontamination procedure prior to shipment</a>
<ul class="section">
<li><a> </a>
<ul class="section">
<li><a> </a></li>
<li><a class="document">About decontamination procedure prior to shipment</a></li>
</ul>
</li>
</ul>
</li>
</ul>
</ul>
</ul>
</div>