我想实现一个下拉菜单，将鼠标悬停在菜单中的特定选项上会打开另一组选项，如下所示（悬停在选项 3 上会打开包含选项 4 和 5 的菜单）-
我一直在使用碳类尝试类似的事情（参考自 - https://the-carbon-components.netlify.app/?nav=dropdown和https://codepen.io/team/carbon/pen/wEGEoz）但是我无法实现它。
这就是我的代码的样子 - HTML -
<ul data-dropdown data-value class="bx--dropdown" tabindex="0">
<li class="bx--dropdown-text">Choose an option</li>
<li>
<ul class="bx--dropdown-list">
<li data-option data-value="Option 1" class="bx--dropdown-item"><a class="bx--dropdown-link" href="javascript:void(0)">Option 1</a></li>
<li data-option data-value="Option 2" class="bx--dropdown-item"><a class="bx--dropdown-link" href="javascript:void(0)">Option 2</a></li>
<li data-option data-value="Option 3" class="bx--dropdown-item" id="openMenu"><a class="bx--dropdown-link" href="javascript:void(0)">Option 3</a>
<ul class="bx--dropdown-list" id="customMenu" style="display:none;margin-left:75px;">
<li data-option data-value="Option 4" class="bx--dropdown-item"><a class="bx--dropdown-link" href="javascript:void(0)">Option 4</a></li>
<li data-option data-value="Option 5" class="bx--dropdown-item"><a class="bx--dropdown-link" href="javascript:void(0)">Option 5</a></li>
</ul>
</li>
</ul>
</li>
</ul>
CSS -
.bx--dropdown {
outline: 2px solid transparent;
outline-offset: -2px;
position: relative;
list-style: none;
display: block;
background-color: white;
border: none;
border-bottom: 1px solid #8C8c8c;
width: 100%;
height: 2.5rem;
cursor: pointer;
color: #171717;
outline: 2px solid transparent;
transition: background-color 70ms cubic-bezier(0.2, 0, 0.38, 0.9);
}
.bx--dropdown-text {
display: block;
padding-left: 1rem;
padding-right: 2.625rem;
overflow: hidden;
text-overflow: ellipsis;
font-size: 0.875rem;
font-weight: 400;
line-height: 1.125rem;
letter-spacing: 0.16px;
}
.bx--dropdown-list {
background-color: white;
display: flex;
flex-direction: column;
outline: 2px solid transparent;
outline-offset: -2px;
box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
font-size: 0.875rem;
font-weight: 400;
line-height: 1.125rem;
letter-spacing: 0.16px;
width: 100%;
list-style: none;
position: absolute;
z-index: 1000;
max-height: 0;
transition: max-height 110ms cubic-bezier(0.2, 0, 0.38, 0.9);
overflow-x: auto;
overflow-y: auto;
}
.bx--dropdown-item {
transition: visibility 70ms cubic-bezier(0.2, 0, 0.38, 0.9), opacity
70ms cubic-bezier(0.2, 0, 0.38, 0.9), background-color 70ms
cubic-bezier(0.2, 0, 0.38, 0.9);
opacity: 0;
visibility: inherit;
position: relative;
}
.bx--dropdown-link {
display: block;
outline: 2px solid transparent;
outline-offset: -2px;
height: 2.5rem;
color: #393939;
text-decoration: none;
font-weight: normal;
line-height: 1rem;
padding: 0.6875rem 0;
margin: 0 1rem;
border: 1px solid transparent;
border-top-color: #e0e0e0;
text-overflow: ellipsis;
overflow: hidden;
white-space: nowrap;
}
.bx--dropdown--open .bx--dropdown-list {
max-height: 15rem;
transition: max-height 110ms cubic-bezier(0, 0, 0.38, 0.9);
}
.bx--dropdown--open .bx--dropdown-item {
opacity: 1;
}
在单击“选择一个选项”框后，此处 .bx--dropdown--open 类被添加到包含类bx--dropdwon的ul中，例如 -
<ul data-dropdown="" data-value="" class="bx--dropdown bx--dropdown--open" tabindex="0">
JS-
$("#openMenu").on("mouseover",function() {showNew();});
$("#openMenu").on("mouseout",function() {showOld();});
function showNew(evt) {
$("#customMenu").attr("style", "display:block;margin-left:75px;");
}
function showOld() {
$("#customMenu").attr("style", "display:none");
}
问题在于，将鼠标悬停在选项 3上时，下拉菜单中会出现滚动条，选项 4和选项 5仅显示在初始下拉菜单中 -
我希望它以与我给出的第一个示例相同的方式出现在该框之外。即使花了很多时间，我也无法理解如何使它工作。任何帮助表示赞赏。