js实现带缓动动画的导航栏效果
程序员文章站
2022-06-29 20:06:44
话不多说，请看实例代码：
...
话不多说，请看实例代码：
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<style type="text/css">
ul,li { padding: 0; margin: 0; }
li { list-style: none; }
#box{
height: 48px;
width: 900px;
background-color: #459df5;
margin: 50px auto;
position: relative;
}
#caution {
width: 150px;
height: 48px;
background-color: #4b92d8;
position: absolute;
top: 0;
left: 0;
}
#list {
position: absolute;
}
#list li {
width: 150px;
height: 48px;
float: left;
color: #fff;
font: 500 20px/48px "微软雅黑";
text-align: center;
cursor: pointer;
}
</style>
<script type="text/javascript">
window.onload = function(){
//获取ul id
var oul = document.getelementbyid("list");
// 获取span id
var caution = document.getelementbyid("caution");
//获取ul 所有孩子
var ali = oul.children;
//定时器管理
var timer = null;
//缓动
var leader = 0;
var target = 0;
//停留
var current = 0;
for(var i = 0;i<ali.length;i++){
//鼠标移动
ali[i].onmouseover = function(){
//关闭定时器
clearinterval(timer);
//获取当前的left值
target = this.offsetleft;
//开启定时器
timer = setinterval(autocaution,20);
}
//鼠标点击
ali[i].onmousedown = function(){
//清楚所有高亮的文字
for(var j = 0;j<ali.length;j++){
ali[j].style.color = "#fff";
}
//当前点击栏变为红色
this.style.color = "#ccc";
//提示框
current = this.offsetleft;
caution.style.left = current+"px";
}
}
//鼠标离开
oul.onmouseout = function(){
//关闭定时器
clearinterval(timer);
target = current;
timer = setinterval(autocaution,20);
}
//缓动动画
function autocaution(){
leader = leader +(target - leader) /10;
caution.style.left = leader+"px";
}
}
</script>
</head>
<body>
<div id="box">
<span id="caution"></span>
<ul id="list">
<li>首页</li>
<li>公司简介</li>
<li>企业文化</li>
<li>招贤纳士</li>
<li>企业论坛</li>
</ul>
</div>
</body>
</html>
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