本文介绍了如何将Bootstrap 5下拉菜单附加到特定元素。当DropDown元素位于具有Overflow：Hidden的元素内时的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我在owl-carousel中使用Bootstrap 5 dropdown menu。但下拉菜单被切断，因为owl-carousel中有外部divoverflow:hidden。
此处提供完整代码片段：jsfiddle
因此，我尝试定位相对于正文下拉列表，而不是<[3-3]，中带边界选项的父项
Bootstrap Docs表示，这只能通过Java脚本完成(不能通过数据属性)，
所以我尝试了下面的Java脚本方法代码。但运气不佳。
var dropdownElementList = [].slice.call(document.querySelectorAll('.dropdown-toggle'))
var dropdownList = dropdownElementList.map(function (dropdownToggleEl) {
return new bootstrap.Dropdown(dropdownToggleEl, {
boundary: document.querySelector('#main-wrapper')
})
})
对于我的错误之处，任何有适当解决方案的建议都将不胜感激。
我们的HTML代码：
<div id="main-wrapper">
<div class="owl-carousel owl-theme">
<div class="item">
<div class="d-flex align-items-center">
<h4>Shilipp Sotocnik</h4>
<div class="dropdown dropdown-lg d-inline-block ms-auto">
<a href="#" role="button" id="dropdownMenu1" data-bs-toggle="dropdown" aria-haspopup="true" aria-expanded="false"><i class="fas fa-ellipsis-h"></i></a>
<ul class="dropdown-menu dropdown-menu-end" aria-labelledby="dropdownMenu1">
<li><a class="dropdown-item" href="#">Link 1</a></li>
<li><a class="dropdown-item" href="#">Link 2</a></li>
<li><a class="dropdown-item" href="#">Link 3</a></li>
<li><a class="dropdown-item" href="#">Link 4</a></li>
</ul>
</div>
</div>
</div>
</div>
</div>
推荐答案
为了避免更改传送带块的属性、添加额外的布局块以及使用overflow属性，我们可以将下拉菜单移到传送带之外。
.each()method遍历页面上的所有旋转木马；- 带有选择器的
.on()method为来自Owl Carousel稍后可以创建的项克隆的事件附加委托事件处理程序； - 调用show方法时立即触发
show.bs.dropdownevent； getInstancemethod返回与DOM元素关联的DropDown实例；.insertAfter()method在目标之后插入元素。
在我们的案例中，下拉菜单将被移动，而不是复制：
如果以这种方式选择的元素被插入到DOM中其他位置的单个位置，则它将移动到目标(未克隆)之后，并返回由插入的元素组成的新集合
我认为我们不需要在关闭后将它们恢复到原来的位置。如果仍需要此操作，则可以通过与hidden.bs.dropdown事件类比来完成此操作。
https://jsfiddle.net/glebkema/s0yua1w7/
数据-lang="js"数据-隐藏="假"数据-控制台="假"数据-巴贝尔="假">$(function() {
$('.owl-carousel')
.each(function() {
let carousel = $(this);
carousel.on('show.bs.dropdown', '[data-bs-toggle=dropdown]', function() {
// universal solution
let dropdown = bootstrap.Dropdown.getInstance(this);
$(dropdown._menu).insertAfter(carousel);
// alternative for this particular layout
// $(this).next('.dropdown-menu').insertAfter(carousel);
});
})
.owlCarousel({
loop:true,
margin:15,
nav:true,
});
});<div class="py-5 mx-4">
<h2>First Owl Carousel</h2>
<div class="owl-carousel owl-theme">
<div class="item card">
<div class="d-flex align-items-center p-3">
<h5>Shilipp Sotocnik 1</h5>
<div class="dropdown dropdown-lg d-inline-block ms-auto">
<a href="#" role="button" id="dropdownMenu1" data-bs-toggle="dropdown" aria-haspopup="true" aria-expanded="false"><i class="fas fa-ellipsis-h"></i></a>
<ul class="dropdown-menu dropdown-menu-end" aria-labelledby="dropdownMenu1">
<li><a class="dropdown-item" href="#">Link 1</a></li>
<li><a class="dropdown-item" href="#">Link 2</a></li>
<li><a class="dropdown-item" href="#">Link 3</a></li>
<li><a class="dropdown-item" href="#">Link 4</a></li>
<li><a class="dropdown-item" href="#">Link 5</a></li>
<li><a class="dropdown-item" href="#">Link 6</a></li>
</ul>
</div>
</div>
<p class="px-3">
Lorem ipsum dummy
</p>
</div>
<div class="item card">
<div class="d-flex align-items-center p-3">
<h5>Shilipp Sotocnik 2</h5>
<div class="dropdown dropdown-lg d-inline-block ms-auto">
<a href="#" role="button" id="dropdownMenu2" data-bs-toggle="dropdown" aria-haspopup="true" aria-expanded="false"><i class="fas fa-ellipsis-h"></i></a>
<ul class="dropdown-menu dropdown-menu-end" aria-labelledby="dropdownMenu2">
<li><a class="dropdown-item" href="#">Link 1</a></li>
<li><a class="dropdown-item" href="#">Link 2</a></li>
<li><a class="dropdown-item" href="#">Link 3</a></li>
<li><a class="dropdown-item" href="#">Link 4</a></li>
<li><a class="dropdown-item" href="#">Link 5</a></li>
<li><a class="dropdown-item" href="#">Link 6</a></li>
<li><a class="dropdown-item" href="#">Link 7</a></li>
<li><a class="dropdown-item" href="#">Link 8</a></li>
</ul>
</div>
</div>
<p class="px-3">
Lorem ipsum dummy
</p>
</div>
<div class="item card">
<div class="d-flex align-items-center p-3">
<h5>Shilipp Sotocnik 3</h5>
<div class="dropdown dropdown-lg d-inline-block ms-auto">
<a href="#" role="button" id="dropdownMenu3" data-bs-toggle="dropdown" aria-haspopup="true" aria-expanded="false"><i class="fas fa-ellipsis-h"></i></a>
<ul class="dropdown-menu dropdown-menu-end" aria-labelledby="dropdownMenu3">
<li><a class="dropdown-item" href="#">Link 1</a></li>
<li><a class="dropdown-item" href="#">Link 2</a></li>
<li><a class="dropdown-item" href="#">Link 3</a></li>
<li><a class="dropdown-item" href="#">Link 4</a></li>
<li><a class="dropdown-item" href="#">Link 5</a></li>
<li><a class="dropdown-item" href="#">Link 6</a></li>
<li><a class="dropdown-item" href="#">Link 7</a></li>
<li><a class="dropdown-item" href="#">Link 8</a></li>
<li><a class="dropdown-item" href="#">Link 9</a></li>
<li><a class="dropdown-item" href="#">Link 10</a></li>
</ul>
</div>
</div>
<p class="px-3">
Lorem ipsum dummy
</p>
</div>
<div class="item card">
<div class="d-flex align-items-center p-3">
<h5>Shilipp Sotocnik 4</h5>
<div class="dropdown dropdown-lg d-inline-block ms-auto">
<a href="#" role="button" id="dropdownMenu4" data-bs-toggle="dropdown" aria-haspopup="true" aria-expanded="false"><i class="fas fa-ellipsis-h"></i></a>
<ul class="dropdown-menu dropdown-menu-end" aria-labelledby="dropdownMenu4">
<li><a class="dropdown-item" href="#">Link 1</a></li>
<li><a class="dropdown-item" href="#">Link 2</a></li>
<li><a class="dropdown-item" href="#">Link 3</a></li>
<li><a class="dropdown-item" href="#">Link 4</a></li>
<li><a class="dropdown-item" href="#">Link 5</a></li>
<li><a class="dropdown-item" href="#">Link 6</a></li>
<li><a class="dropdown-item" href="#">Link 7</a></li>
<li><a class="dropdown-item" href="#">Link 8</a></li>
<li><a class="dropdown-item" href="#">Link 9</a></li>
<li><a class="dropdown-item" href="#">Link 10</a></li>
<li><a class="dropdown-item" href="#">Link 11</a></li>
<li><a class="dropdown-item" href="#">Link 12</a></li>
</ul>
</div>
</div>
<p class="px-3">
Lorem ipsum dummy
</p>
</div>
</div>
<h2>Second Owl Carousel</h2>
<div class="owl-carousel owl-theme">
<div class="item card">
<div class="d-flex align-items-center p-3">
<h5>Shilipp Sotocnik 1</h5>
<div class="dropdown dropdown-lg d-inline-block ms-auto">
<a href="#" role="button" id="dropdownMenu21" data-bs-toggle="dropdown" aria-haspopup="true" aria-expanded="false"><i class="fas fa-ellipsis-h"></i></a>
<ul class="dropdown-menu dropdown-menu-end" aria-labelledby="dropdownMenu21">
<li><a class="dropdown-item" href="#">Link 1</a></li>
<li><a class="dropdown-item" href="#">Link 2</a></li>
<li><a class="dropdown-item" href="#">Link 3</a></li>
<li><a class="dropdown-item" href="#">Link 4</a></li>
<li><a class="dropdown-item" href="#">Link 5</a></li>
<li><a class="dropdown-item" href="#">Link 6</a></li>
</ul>
</div>
</div>
<p class="px-3">
Lorem ipsum dummy
</p>
</div>
<div class="item card">
<div class="d-flex align-items-center p-3">
<h5>Shilipp Sotocnik 2</h5>
<div class="dropdown dropdown-lg d-inline-block ms-auto">
<a href="#" role="button" id="dropdownMenu22" data-bs-toggle="dropdown" aria-haspopup="true" aria-expanded="false"><i class="fas fa-ellipsis-h"></i></a>
<ul class="dropdown-menu dropdown-menu-end" aria-labelledby="dropdownMenu22">
<li><a class="dropdown-item" href="#">Link 1</a></li>
<li><a class="dropdown-item" href="#">Link 2</a></li>
<li><a class="dropdown-item" href="#">Link 3</a></li>
<li><a class="dropdown-item" href="#">Link 4</a></li>
<li><a class="dropdown-item" href="#">Link 5</a></li>
<li><a class="dropdown-item" href="#">Link 6</a></li>
<li><a class="dropdown-item" href="#">Link 7</a></li>
<li><a class="dropdown-item" href="#">Link 8</a></li>
</ul>
</div>
</div>
<p class="px-3">
Lorem ipsum dummy
</p>
</div>
<div class="item card">
<div class="d-flex align-items-center p-3">
<h5>Shilipp Sotocnik 3</h5>
<div class="dropdown dropdown-lg d-inline-block ms-auto">
<a href="#" role="button" id="dropdownMenu23" data-bs-toggle="dropdown" aria-haspopup="true" aria-expanded="false"><i class="fas fa-ellipsis-h"></i></a>
<ul class="dropdown-menu dropdown-menu-end" aria-labelledby="dropdownMenu23">
<li><a class="dropdown-item" href="#">Link 1</a></li>
<li><a class="dropdown-item" href="#">Link 2</a></li>
<li><a class="dropdown-item" href="#">Link 3</a></li>
<li><a class="dropdown-item" href="#">Link 4</a></li>
<li><a class="dropdown-item" href="#">Link 5</a></li>
<li><a class="dropdown-item" href="#">Link 6</a></li>
<li><a class="dropdown-item" href="#">Link 7</a></li>
<li><a class="dropdown-item" href="#">Link 8</a></li>
<li><a class="dropdown-item" href="#">Link 9</a></li>
<li><a class="dropdown-item" href="#">Link 10</a></li>
</ul>
</div>
</div>
<p class="px-3">
Lorem ipsum dummy
</p>
</div>
<div class="item card">
<div class="d-flex align-items-center p-3">
<h5>Shilipp Sotocnik 4</h5>
<div class="dropdown dropdown-lg d-inline-block ms-auto">
<a href="#" role="button" id="dropdownMenu24" data-bs-toggle="dropdown" aria-haspopup="true" aria-expanded="false"><i class="fas fa-ellipsis-h"></i></a>
<ul class="dropdown-menu dropdown-menu-end" aria-labelledby="dropdownMenu24">
<li><a class="dropdown-item" href="#">Link 1</a></li>
<li><a class="dropdown-item" href="#">Link 2</a></li>
<li><a class="dropdown-item" href="#">Link 3</a></li>
<li><a class="dropdown-item" href="#">Link 4</a></li>
<li><a class="dropdown-item" href="#">Link 5</a></li>
<li><a class="dropdown-item" href="#">Link 6</a></li>
<li><a class="dropdown-item" href="#">Link 7</a></li>
<li><a class="dropdown-item" href="#">Link 8</a></li>
<li><a class="dropdown-item" href="#">Link 9</a></li>
<li><a class="dropdown-item" href="#">Link 10</a></li>
<li><a class="dropdown-item" href="#">Link 11</a></li>
<li><a class="dropdown-item" href="#">Link 12</a></li>
</ul>
</div>
</div>
<p class="px-3">
Lorem ipsum dummy
</p>
</div>
</div>
<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Sunt doloribus ipsa at culpa fugit nesciunt nulla rem inventore eum perspiciatis assumenda ipsam aut architecto unde laboriosam totam fuga in, dolore.</p>
</div>
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