javascript - 动态设置 li 的宽度以匹配父 ul 的宽度

Question

我正在使用嵌套在 ul 中的 li 进行下拉，但无法设置 li 的宽度以动态匹配 ul 的宽度。

请注意，li 元素被限制在下拉列表中。

下面的 css 看起来太多了，但本质上它只是关于 ul 和 li。

CSS

<style type="text/css" media="screen, tv, projection">

/* - - - ADxMenu: BASIC styles - - - */

/* remove all list stylings
.menu, .menu ul {
    margin: 0;
    padding: 0;
    border: 0;
    list-style-type: none;
    display: block;
}
*/
.menu li {
    margin: 0;
    padding: 0;
    border: 0;
    display: block;
    float: left;    /* move all main list items into one row, by floating them */
    position: relative; /* position each LI, thus creating potential IE.win overlap problem */
    z-index: 5;     /* thus we need to apply explicit z-index here... */
}

.menu li:hover {
    z-index: 10000; /* ...and here. this makes sure active item is always above anything else in the menu */
    white-space: normal;/* required to resolve IE7 :hover bug (z-index above is ignored if this is not present)
                            see http://www.tanfa.co.uk/css/articles/pure-css-popups-bug.asp for other stuff that work */
}

.menu li li {
    float: none;/* items of the nested menus are kept on separate lines */
}

.menu ul {
    visibility: hidden; /* initially hide all submenus. */
    position: absolute;
    z-index: 10;
    left: 0;    /* while hidden, always keep them at the bottom left corner, */
    bottom: 0;      /*      to avoid scrollbars as much as possible */

}

.menu li:hover>ul {
    visibility: visible;    /* display submenu them on hover */
    bottom: 100%;   /* 1st level go above their parent item */
}

.menu li li:hover>ul {  /* 2nd+ levels go on the right side of the parent item */
    bottom: 0;
    left: 100%;
}

/* -- float.clear --
    force containment of floated LIs inside of UL */
.menu:after, .menu ul:after {
    content: ".";
    height: 0;
    display: block;
    visibility: hidden;
    overflow: hidden;
    clear: both;
}
.menu, .menu ul {   /* IE7 float clear: */
    min-height: 0;
}

.menu ul ul {
    padding: 30px 30px 30px 10px;
    margin: 0 0 -30px -10px;

}


/* - - - ADxMenu: DESIGN styles - - - */

.menu, .menu ul li {
    color: #eee;
    background: #000;
}

.menu ul {
    background: #000;
    width: 11em;
}

.menu a {
    text-decoration: none;
    padding: .4em 1em;
    display: block;
    position: relative;
        font-family:BlairMdITCTTMedium;
        color:#848484;
        font-size:11px;
}

.menu a:hover, .menu li:hover>a {
    color: #ccc;
}

.menu li li {   /* create borders around each item */
    border: 1px solid #000;
}

.menu ul>li + li {  /* and remove the top border on all but first item in the list */
    border-top: 0;
}

.menu li li:hover>ul {  /* inset 2nd+ submenus, to show off overlapping */
    bottom: 5px;
    left: 90%;
}


/* Fix for IE5/Mac \*//*/
.menu a {
    float: left;
}
/* End Fix */

/*]]>*/
</style>


**THE HTML CODE**

    <ul class="menu">
        <li style="width:80px;">
        <a id="menu1" title="View all posts filed under Accessories" href="http://monique-relander.be/objects/accessories/">Accessories</a>
            <ul>
                <li><a href="http://www.aplus.co.yu/">Home</a></li>
                <li><a href="http://www.aplus.co.yu/feeds/">Feeds</a></li>
                <li><a href="http://www.aplus.co.yu/archive/">Archive</a></li>
            </ul>
        </li>
        <li style="width:80px;">
        <a title="View all posts filed under Furniture" href="http://monique-relander.be/objects/furniture/">Furniture</a>
                    <ul>
                        <li><a href="http://www.aplus.co.yu/">Home</a></li>
                        <li><a href="http://www.aplus.co.yu/feeds/">Feeds</a></li>
                        <li><a href="http://www.aplus.co.yu/archive/">Archive</a></li>
            </ul>
        </li>
        <li style="width:80px;">
        <a title="View all posts filed under Lighting" href="http://monique-relander.be/objects/lighting/">Lighting</a>
                    <ul>
                        <li><a href="http://www.aplus.co.yu/">Home</a></li>
                        <li><a href="http://www.aplus.co.yu/feeds/">Feeds</a></li>
                        <li><a href="http://www.aplus.co.yu/archive/">Archive</a></li>
            </ul>
        </li>
        <li style="width:80px;">
        <a title="View all posts filed under Mirrors" href="http://monique-relander.be/objects/mirrors/">Mirrors</a>
                    <ul>
                        <li><a href="http://www.aplus.co.yu/">Home</a></li>
                        <li><a href="http://www.aplus.co.yu/feeds/">Feeds</a></li>
                        <li><a href="http://www.aplus.co.yu/archive/">Archive</a></li>
            </ul>
        </li>
        <li class="none" style="width:140px;">
        <a title="View all posts filed under NEW ARRIVALS" href="http://monique-relander.be/objects/new-arrivals/">New Arrivals</a></li>
        <li style="width:130px;">
        <a title="View all posts filed under Sold Gallery" href="http://monique-relander.be/objects/sold-gallery/">Sold Gallery</a></li>
        <li class="cat-item right">
        <a href="/contact">Contact</a></li>
    </ul>

Answer 1

li的宽度好像默认和ul一样。

至少基于我在这里的实验 http://jsfiddle.net/dwCsW/

如果您删除 ul 宽度，它将是 100%，并且通过设置 ul 宽度，li 将跟随。所以你的代码中一定有其他东西删除了它。