本文透過實例程式碼跟大家介紹了CSS實作滑鼠懸浮無限向下級展示的實例程式碼，需要的朋友參考下吧
廢話不多說了，直接大家貼程式碼了，具體程式碼如下所示；
*{
margin: 0;
padding: 0;
}
ul,li{
list-style: none;
}
.ui-slide-box{
width: 300px;
}
.ui-slide-item{
width: 100%;
position: relative;
}
.ui-slide-item-text{
display: block;
background-color: #000000;
color: white;
border-bottom: 1px solid yellow;
height: 40px;
line-height: 40px;
}
.ui-slide-item .ui-slide-box{
display: none;
position: absolute;
left: 300px;
top: 0;
}
.ui-slide-item:hover > .ui-slide-box{
display: block;
}<ul class="ui-slide-box">
<li class="ui-slide-item">
<span class="ui-slide-item-text">aaaaaaaaaaaaa</span>
<ul class="ui-slide-box">
<li class="ui-slide-item">
<span class="ui-slide-item-text">aaaaaaaaaaaa</span>
<ul class="ui-slide-box">
<li class="ui-slide-item">
<span class="ui-slide-item-text">dddddddd </span>
</li>
<li class="ui-slide-item">
<span class="ui-slide-item-text">sssssssssssss</span>
</li>
<li class="ui-slide-item">
<span class="ui-slide-item-text">eeeeeeeeeeee</span>
</li>
<li class="ui-slide-item">
<span class="ui-slide-item-text">ccccccccccccc</span>
<ul class="ui-slide-box">
<li class="ui-slide-item">
<span class="ui-slide-item-text">aaaaaaaaaaaaa</span>
<ul class="ui-slide-box">
<li class="ui-slide-item">
<span class="ui-slide-item-text">aaaaaaaaaaaa</span>
<ul class="ui-slide-box">
<li class="ui-slide-item">
<span class="ui-slide-item-text">dddddddd </span>
</li>
<li class="ui-slide-item">
<span class="ui-slide-item-text">sssssssssssss</span>
</li>
<li class="ui-slide-item">
<span class="ui-slide-item-text">eeeeeeeeeeee</span>
</li>
<li class="ui-slide-item">
<span class="ui-slide-item-text">ccccccccccccc</span>
</li>
</ul>
</li>
<li class="ui-slide-item">
<span class="ui-slide-item-text">bbbbbbbbbb</span>
<ul class="ui-slide-box">
<li class="ui-slide-item">
<span class="ui-slide-item-text">sfsdfsdfsd </span>
</li>
<li class="ui-slide-item">
<span class="ui-slide-item-text">cvwdfsd</span>
</li>
<li class="ui-slide-item">
<span class="ui-slide-item-text">ewewewe</span>
</li>
<li class="ui-slide-item">
<span class="ui-slide-item-text">xxcxc</span>
</li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
<li class="ui-slide-item">
<span class="ui-slide-item-text">bbbbbbbbbb</span>
<ul class="ui-slide-box">
<li class="ui-slide-item">
<span class="ui-slide-item-text">sfsdfsdfsd </span>
</li>
<li class="ui-slide-item">
<span class="ui-slide-item-text">cvwdfsd</span>
</li>
<li class="ui-slide-item">
<span class="ui-slide-item-text">ewewewe</span>
</li>
<li class="ui-slide-item">
<span class="ui-slide-item-text">xxcxc</span>
</li>
</ul>
</li>
</ul>
</li>
<li class="ui-slide-item">
<span class="ui-slide-item-text">bbbbbbbbbbb</span>
<ul class="ui-slide-box">
<li class="ui-slide-item">
<span class="ui-slide-item-text">aaaaaaaaaaaa</span>
<ul class="ui-slide-box">
<li class="ui-slide-item">
<span class="ui-slide-item-text">dddddddd </span>
</li>
<li class="ui-slide-item">
<span class="ui-slide-item-text">sssssssssssss</span>
</li>
<li class="ui-slide-item">
<span class="ui-slide-item-text">eeeeeeeeeeee</span>
</li>
<li class="ui-slide-item">
<span class="ui-slide-item-text">ccccccccccccc</span>
</li>
</ul>
</li>
</ul>
</li>
<li class="ui-slide-item">
<span class="ui-slide-item-text">cccccccccccccccccc</span>
<ul class="ui-slide-box">
<li class="ui-slide-item">
<span class="ui-slide-item-text">rrrrrrrrrrrrrrrrrrrrrrrrrr</span>
<ul class="ui-slide-box">
<li class="ui-slide-item">
<span class="ui-slide-item-text">dddddddd </span>
</li>
<li class="ui-slide-item">
<span class="ui-slide-item-text">sssssssssssss</span>
</li>
<li class="ui-slide-item">
<span class="ui-slide-item-text">eeeeeeeeeeee</span>
</li>
<li class="ui-slide-item">
<span class="ui-slide-item-text">ccccccccccccc</span>
</li>
</ul>
</li>
</ul>
</li>
</ul>
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