Das Beispiel in diesem Artikel beschreibt, wie Sie mithilfe von JavaScript einen horizontalen Slide-Out-Menüeffekt mit mehreren Ebenen implementieren. Teilen Sie es als Referenz mit allen. Die Details lauten wie folgt:
Dies ist ein mehrstufiges JavaScript-Menü, das horizontal herausgeschoben werden kann, um das sekundäre Menü zu animieren. Das Gesamtdesign ist exquisit und großartig und kann auch in Blogs verwendet werden.
Der Screenshot des Laufeffekts sieht wie folgt aus:
Die Online-Demo-Adresse lautet wie folgt:
http://demo.jb51.net/js/2015/js-hx-show-menu-style-demo/
Der spezifische Code lautet wie folgt:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>JavaScript横向滑出的多级菜单</title>
<style>
* {padding:0; margin:0}
body {font:12px Verdana, Arial, Helvetica}
#wrapper {width:750px; padding:25px; margin:0 auto}
#leftcolumn {float:left; width:225px}
#rightcolumn {float:left; width:525px}
.dropdown {display:block; position:relative}
.dropdown dt {width:188px; border:2px solid #9ac1c9; padding:8px; font-weight:bold; cursor:pointer; background:url(images/header.gif)}
.dropdown .upperdd {border-bottom:none}
.dropdown dt:hover {background:url(images/header_over.gif)}
.dropdown dd {position:absolute; top:0; overflow:hidden; width:208px; display:none; background:#fff; opacity:0}
.dropdown ul {width:204px; border:2px solid #9ac1c9; list-style:none}
.dropdown li {display:inline}
.dropdown a, .dropdown a:active, .dropdown a:visited {display:block; padding:5px; color:#333; text-decoration:none; background:#eaf0f2; width:194px}
.dropdown a:hover {background:#d9e1e4; color:#000}
.dropdown .underline {border-bottom:1px solid #b9d6dc}
</style>
<script type="text/javascript">
var DDSPEED = 10;
var DDTIMER = 15;
var OFFSET = -2;
var ZINT = 100;
function ddMenu(id,d){
var h = document.getElementById(id + '-ddheader');
var c = document.getElementById(id + '-ddcontent');
clearInterval(c.timer);
if(d == 1){
clearTimeout(h.timer);
c.style.display = 'block';
if(c.maxh && c.maxh <= c.offsetHeight){return}
else if(!c.maxh){
c.style.left = (h.offsetWidth + OFFSET) + 'px';
c.style.height = 'auto';
c.maxh = c.offsetHeight;
c.style.height = '0px';
}
ZINT = ZINT + 1;
c.style.zIndex = ZINT;
c.timer = setInterval(function(){ddSlide(c,1)},DDTIMER);
}else{
h.timer = setTimeout(function(){ddCollapse(c)},50);
}
}
function ddCollapse(c){
c.timer = setInterval(function(){ddSlide(c,-1)},DDTIMER);
}
function cancelHide(id){
var h = document.getElementById(id + '-ddheader');
var c = document.getElementById(id + '-ddcontent');
clearTimeout(h.timer);
clearInterval(c.timer);
if(c.offsetHeight < c.maxh){
c.timer = setInterval(function(){ddSlide(c,1)},DDTIMER);
}
}
function ddSlide(c,d){
var currh = c.offsetHeight;
var dist;
if(d == 1){
dist = Math.round((c.maxh - currh) / DDSPEED);
}else{
dist = Math.round(currh / DDSPEED);
}
if(dist <= 1 && d == 1){
dist = 1;
}
c.style.height = currh + (dist * d) + 'px';
c.style.opacity = currh / c.maxh;
c.style.filter = 'alpha(opacity=' + (currh * 100 / c.maxh) + ')';
if(currh > (c.maxh - 2) && d == 1){
clearInterval(c.timer);
}else if(dist < 1 && d != 1){
clearInterval(c.timer);
c.style.display = 'none';
}
}
</script>
</head>
<body>
<div id="wrapper">
<div id="leftcolumn">
<dl class="dropdown">
<dt id="one-ddheader" class="upperdd" onmouseover="ddMenu('one',1)" onmouseout="ddMenu('one',-1)">我们首页</dt>
<dd id="one-ddcontent" onmouseover="cancelHide('one')" onmouseout="ddMenu('one',-1)">
<ul>
<li><a href="#" class="underline">脚本主页</a></li>
<li><a href="#" class="underline">网页特效</a></li>
<li><a href="#">脚本下载</a></li>
</ul>
</dd>
</dl>
<dl class="dropdown">
<dt id="two-ddheader" class="upperdd" onmouseover="ddMenu('two',1)" onmouseout="ddMenu('two',-1)">网站导航</dt>
<dd id="two-ddcontent" onmouseover="cancelHide('two')" onmouseout="ddMenu('two',-1)">
<ul>
<li><a href="#" class="underline">ASP</a></li>
<li><a href="#" class="underline">PHP</a></li>
<li><a href="#" class="underline">.NET</a></li>
<li><a href="#">网站留言</a></li>
</ul>
</dd>
</dl>
<dl class="dropdown">
<dt id="three-ddheader" class="upperdd">最新下载</dt>
</dl>
<dl class="dropdown">
<dt id="four-ddheader" onmouseover="ddMenu('four',1)" onmouseout="ddMenu('four',-1)">欢迎回来</dt>
<dd id="four-ddcontent" onmouseover="cancelHide('four')" onmouseout="ddMenu('four',-1)">
<ul>
<li><a href="#" class="underline">欢迎再来</a></li>
<li><a href="#">慢走，不送</a></li>
</ul>
</dd>
</dl>
</div>
</div>
</body>
</html>Ich hoffe, dass dieser Artikel für die JavaScript-Programmierung aller hilfreich sein wird.
