Question

我的问题类似于CSS: How to have position:absolute div inside a position:relative div not be cropped by an overflow:hidden on a container。

我有一个很长的垂直菜单，显示悬停的子菜单。我想在我的页面上固定菜单和100％高度，并使用滚动条滚动菜单项。我将使用jquery slimScroll来显示需要父容器溢出的滚动条：隐藏。

问题是，如果子容器有溢出，则子菜单不会显示在父容器上：隐藏。 Html代码：

<div class="scrollable">
<ul class="menu">
    <li>Menu
        <ul class="submenu">
            <li>Submenu</li>
            <li>Submenu</li>
            <li>Submenu</li>
        </ul>                   
    </li>
    <li>Menu
        <ul class="submenu">
            <li>Submenu</li>
            <li>Submenu</li>
            <li>Submenu</li>
        </ul>                   
    </li>
    <li>Menu
        <ul class="submenu">
            <li>Submenu</li>
        </ul>                   
    </li>
    <li>Menu
        <ul class="submenu">
            <li>Submenu</li>
            <li>Submenu</li>
            <li>Submenu</li>
        </ul>                   
    </li>
    <li>Menu
        <ul class="submenu">
            <li>Submenu</li>
            <li>Submenu</li>
            <li>Submenu</li>
        </ul>                   
    </li>
</ul>

CSS代码：

 /* this needs to have a fixed position */
.scrollable {   
    /* If i remove the fixed position the ul's will go outside */
    position: fixed;
    top: 0;
    left: 0;

    overflow: hidden;
    /*
    overflow-y: scroll;
    overflow-x: hidden;
    overflow-x: visible;
    */    
    width: 100px;
    height: 100px;
    border: 1px solid #ff0000;
    padding: 10px;
}
ul {
    margin: 0; 
    padding: 0; 
    list-style-type: none;
    position: absolute;
}
li {  
    width: 100px;  
    background-color: #dddddd; 
    line-height: 50px;
    height: 50px;
    border-bottom: 1px solid #fff;
    display: block;
    /* even if I set position to absolute, which messes the design, the submenu wont show outside */
    /* position: absolute; */
}
.submenu { 
    display:none; 
    margin: -45px 0 0 70px;
    border: 1px solid #000;
    position: absolute;
    z-index: 100;
}
.menu li:hover .submenu {
    display: block;
}

我在这里有一个条纹html和css的例子jsfiddle。

有没有办法在容器上显示子菜单溢出：隐藏？

Answer 1

请检查 link ，并告诉我这就是您要找的内容。

<强> CSS

ul {
    margin: 0;
    padding: 0;
    list-style-type: none;
}
.scrollable {
    position: fxied;
    top: 0;
    left: 0;
    overflow: hidden;
    width: 100px;
    height: 100px;
    border: 1px solid #ff0000;
    padding: 10px;
}
ul.menu > li {
    color: #ff0000;
}
li {
    background-color: #dddddd;
    line-height: 50px;
    height: 50px;
    border-bottom: 1px solid #fff;
    display: block;
}
.submenu {
    width: 200px;
    display:none;
    margin: -45px 0 0 70px;
    border: 1px solid #000;
    position: absolute;
    z-index: 100;
}
.menu li:hover .submenu {
    display: block;
}

CSS：带位置的UL：绝对显示位置的外部容器：固定和溢出：隐藏

1 个答案: