javascript - 我的 CSS 失败了我的 javascript 下拉菜单幻灯片效果

Question

所以如果你想看我的菜单去这里。

因为我知道你会想要我的源代码，所以这里是 CSS：

* {
margin: 0px;
}
#menu-container ul,
#menu-container li,
#menu-container span,
#menu-container a {
  margin: 0;
  padding: 0;
  position: relative;
}
#menu-container {
  text-align:center;  
  height: 49px;
  border-radius: 0px 0px 0 0;
  -moz-border-radius: 0px 0px 0 0;
  -webkit-border-radius: 0px 0px 0 0;
  background: #141414;

  background:url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAAxCAIAAACUDVRzAAAAA3NCSVQICAjb4U/gAAAALElEQVQImWMwMrJi+v//PxMDw3+m//8ZoPR/qBgDEhuXGLoeYswhXg8R5gAAdVpfoJ3dB5oAAAAASUVORK5CYII=) 100% 100%; 
  background: -moz-linear-gradient(top, #32323a 0%, #141414 100%);
  background: -webkit-gradient(linear, left top, left bottom, color-stop(0%, #32323a), color-stop(100%, #141414));
  background: -webkit-linear-gradient(top, #32323a 0%, #141414 100%);
  background: -o-linear-gradient(top, #32323a 0%, #141414 100%);
  background: -ms-linear-gradient(top, #32323a 0%, #141414 100%);
  background: linear-gradient(to bottom, #32323a 0%, #141414 100%);
  border-bottom: 2px solid #0fa1e0;
}
#menu-container:after,
#menu-container ul:after {
  content: '';
  display: block;
  clear: both;
}
#menu-container a {
  background: #141414;
  background:url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAAxCAIAAACUDVRzAAAAA3NCSVQICAjb4U/gAAAALElEQVQImWMwMrJi+v//PxMDw3+m//8ZoPR/qBgDEhuXGLoeYswhXg8R5gAAdVpfoJ3dB5oAAAAASUVORK5CYII=) 100% 100%; 
  background: -moz-linear-gradient(top, #32323a 0%, #141414 100%);
  background: -webkit-gradient(linear, left top, left bottom, color-stop(0%, #32323a), color-stop(100%, #141414));
  background: -webkit-linear-gradient(top, #32323a 0%, #141414 100%);
  background: -o-linear-gradient(top, #32323a 0%, #141414 100%);
  background: -ms-linear-gradient(top, #32323a 0%, #141414 100%);
  background: linear-gradient(to bottom, #32323a 0%, #141414 100%);
  color: #ffffff;
  display: inline-block;
  margin-right: -4px;
  font-family: Helvetica, Arial, Verdana, sans-serif;
  font-size: 12px;
  line-height: 49px;
  padding: 0 20px;
  text-decoration: none;
}
#menu-container ul {
  list-style: none;
}
#menu-container > ul > li {
  display: inline-block;
  margin-right: -4px;
}
#menu-container > ul > li:hover:after {
  content: '';
  display: block;
  width: 0;
  height: 0;
  position: absolute;
  left: 50%;
  bottom: 0;
  border-left: 10px solid transparent;
  border-right: 10px solid transparent;
  border-bottom: 10px solid #0fa1e0;
  margin-left: -10px;
}
#menu-container > ul > li:first-child > a {
  border-radius: 0px 0 0 0;
  -moz-border-radius: 0px 0 0 0;
  -webkit-border-radius: 0px 0 0 0;
}
#menu-container > ul > li:last-child > a {
  border-radius: 0 0px 0 0;
  -moz-border-radius: 0 0px 0 0;
  -webkit-border-radius: 0 0px 0 0;
}
#menu-container > ul > li.active > a {
  box-shadow: inset 0 0 3px #000000;
  -moz-box-shadow: inset 0 0 3px #000000;
  -webkit-box-shadow: inset 0 0 3px #000000;
  background: #070707;
  background:url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAAxCAIAAACUDVRzAAAAA3NCSVQICAjb4U/gAAAALklEQVQImWNQU9Nh+v//PxMDw3+m//8ZkNj/mRgYIHxy5f//Z0BSi18e2TwS5QG4MGB54HL+mAAAAABJRU5ErkJggg==) 100% 100%; 
  background: -moz-linear-gradient(top, #26262c 0%, #070707 100%);
  background: -webkit-gradient(linear, left top, left bottom, color-stop(0%, #26262c), color-stop(100%, #070707));
  background: -webkit-linear-gradient(top, #26262c 0%, #070707 100%);
  background: -o-linear-gradient(top, #26262c 0%, #070707 100%);
  background: -ms-linear-gradient(top, #26262c 0%, #070707 100%);
  background: linear-gradient(to bottom, #26262c 0%, #070707 100%);
}
#menu-container > ul > li:hover > a {
  background: #070707;
  background:url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAAxCAIAAACUDVRzAAAAA3NCSVQICAjb4U/gAAAALklEQVQImWNQU9Nh+v//PxMDw3+m//8ZkNj/mRgYIHxy5f//Z0BSi18e2TwS5QG4MGB54HL+mAAAAABJRU5ErkJggg==) 100% 100%; 
  background: -moz-linear-gradient(top, #26262c 0%, #070707 100%);
  background: -webkit-gradient(linear, left top, left bottom, color-stop(0%, #26262c), color-stop(100%, #070707));
  background: -webkit-linear-gradient(top, #26262c 0%, #070707 100%);
  background: -o-linear-gradient(top, #26262c 0%, #070707 100%);
  background: -ms-linear-gradient(top, #26262c 0%, #070707 100%);
  background: linear-gradient(to bottom, #26262c 0%, #070707 100%);
  box-shadow: inset 0 0 3px #000000;
  -moz-box-shadow: inset 0 0 3px #000000;
  -webkit-box-shadow: inset 0 0 3px #000000;
}
#menu-container .has-sub {
  z-index: 1;
}
#menu-container .has-sub:hover > ul {
  display: block;
}
#menu-container .has-sub ul {
  display: none;
  position: absolute;
  width: 200px;
  top: 100%;
  left: 0;
}
#menu-container .has-sub ul li {
  *margin-bottom: -1px;
}
#menu-container .has-sub ul li a {
  background: #0fa1e0;
  border-bottom: 1px dotted #6fc7ec;
  filter: none;
  font-size: 11px;
  display: block;
  line-height: 120%;
  padding: 10px;
}
#menu-container .has-sub ul li:hover a {
  background: #0c7fb0;
}
#menu-container .has-sub .has-sub:hover > ul {
  display: block;
}
#menu-container .has-sub .has-sub ul {
  display: none;
  position: absolute;
  left: 100%;
  top: 0;
}
#menu-container .has-sub .has-sub ul li a {
  background: #0c7fb0;
  border-bottom: 1px dotted #6db2d0;
}
#menu-container .has-sub .has-sub ul li a:hover {
  background: #095c80;
}
#menu-container {
-moz-box-shadow: 0 0 10px #888;
-webkit-box-shadow: 0 0 10px #888;
box-shadow: 0 0 10px #888;
}
li {
    font-size: 0
}

和 JavaScript：

    var menu=function(){
    var t=15,z=50,s=6,a;
    function dd(n){this.n=n; this.h=[]; this.c=[]}
    dd.prototype.init=function(p,c){
        a=c; var w=document.getElementById(p), s=w.getElementsByTagName('ul'), l=s.length, i=0;
        for(i;i<l;i++){
            var h=s[i].parentNode; this.h[i]=h; this.c[i]=s[i];
            h.onmouseover=new Function(this.n+'.st('+i+',true)');
            h.onmouseout=new Function(this.n+'.st('+i+')');
        }
    }
    dd.prototype.st=function(x,f){
        var c=this.c[x], h=this.h[x], p=h.getElementsByTagName('a')[0];
        clearInterval(c.t); c.style.overflow='hidden';
        if(f){
            p.className+=' '+a;
            if(!c.mh){c.style.display='block'; c.style.height=''; c.mh=c.offsetHeight; c.style.height=0}
            if(c.mh==c.offsetHeight){c.style.overflow='visible'}
            else{c.style.zIndex=z; z++; c.t=setInterval(function(){sl(c,1)},t)}
        }else{p.className=p.className.replace(a,''); c.t=setInterval(function(){sl(c,-1)},t)}
    }
    function sl(c,f){
        var h=c.offsetHeight;
        if((h<=0&&f!=1)||(h>=c.mh&&f==1)){
            if(f==1){c.style.filter=''; c.style.opacity=1; c.style.overflow='visible'}
            clearInterval(c.t); return
        }
        var d=(f==1)?Math.ceil((c.mh-h)/s):Math.ceil(h/s), o=h/c.mh;
        c.style.opacity=o; c.style.filter='alpha(opacity='+(o*100)+')';
        c.style.height=h+(d*f)+'px'
    }
    return{dd:dd}
}();

和 HTML：

<div id='menu-container'>
<ul id='menu' class="menu">
<li class='active'><a href='/'><span>Home</span></a></li>
<li class='has-sub'><a href='/games/'><span>Games</span></a>
<ul>
<li><a href='/games/dota-2/'><span>Dota 2</span></a></li>
<li><a href='/games/cs-go/'><span>CS: GO</span></a></li>
<li><a href='/games/css/'><span>CS: Source</span></a></li>
<li><a href='/games/terraria/'><span>Terraria</span></a></li>
<li class='last'><a href='/games/minecraft/'><span>Minecraft</span></a></li>
</ul>
</li>
<li class='has-sub'><a href='/about.html'><span>About Us</span></a>
<ul>
<li><a href='http://www.youtube.com/user/'><span>Our YouTube Channel</span></a></li>
<li><a href='/faq-list.html'><span>Our FAQs/Q&amp;A List</span></a></li>
<li><a href='/feed-news.rss'><span>Our RSS Feed</span></a></li>
<li><a href='/wiki/'><span>Our Wiki</span></a></li>
<li><a href='#'><span>Our Blog</span></a></li>
<li class='last'><a href='/privacy.html'><span>Privacy Policy</span></a></li>
</ul>
</li>
<li class='has-sub last'><a href='/contact.html'><span>Contact Us</span></a>
<ul>
<li class='last'><a href='/forums/'><span>Forums</span></a></li>
</ul>
</li>
</ul>
</div>
<script type="text/javascript">
var menu=new menu.dd("menu");
menu.init("menu","menuhover");
</script>

在我添加“文本对齐：中心；”之后对于我的 CSS，当我将鼠标悬停在菜单上时，幻灯片动画会向下移动，但它也会向右移动。如何让它只下降？因此，我希望当您将鼠标悬停在菜单上时，幻灯片仅位于底部而不是右侧。

score 2 · Accepted Answer

菜单 [#menu-container a] 中的链接继承了负边距。因此，您的菜单项最终会比菜单宽 4 个像素。您可以通过添加到更具体的选择器来将边距重置为 0，如下所示：

#menu-container .has-sub ul li a { margin-right: 0 }

javascript - 我的 CSS 失败了我的 javascript 下拉菜单幻灯片效果

1 回答 1

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