js实现缓动动画

本文实例为大家分享了js实现缓动动画的具体代码,供大家参考,具体内容如下

利用定时器来控制元素的offsetLeft的值,offsetLeft = 开始位置 + (最终位置 - 开始位置)* 缓动系数

<!DOCTYPE html>

<html lang="en">

<head>

<meta charset="UTF-8">

<title>Title</title>

<style>

* {

margin: 0;

padding: 0;

border: none;

list-style: none;

}

body {

background-color: pink;

}

#nav {

width: 900px;

height: 63px;

background: url("images/doubleOne.png") no-repeat right center #fff;

margin: 0 auto;

margin-top: 50px;

border-radius: 5px;

position: relative;

}

#nav ul {

line-height: 70px;

}

#nav ul li {

float: left;

height: 63px;

width: 88px;

text-align: center;

cursor: pointer;

position: relative;

}

#t_mail {

width: 88px;

height: 63px;

background: url("images/tMall.png") no-repeat;

position: absolute;

}

</style>

</head>

<body>

<nav id="nav">

<span id="t_mail"></span>

<ul>

<li>双11狂欢</li>

<li>服装会场</li>

<li>数码家电</li>

<li>母婴童装</li>

<li>手机会场</li>

<li>美妆会场</li>

<li>家居建材</li>

<li>进口会场</li>

<li>飞猪旅行</li>

</ul>

</nav>

<script>

window.onload = function () {

var nav = $('nav');

var t_mall = nav.children[0];

var ul = nav.children[1];

var allLis = ul.children;

var beginX = 0;

for (var i = 0; i < allLis.length; i++) {

var li = allLis[i];

li.onmouseover = function () {

end = this.offsetLeft;

}

li.onmousedown = function () {

beginX = this.offsetLeft;

}

li.onmouseout = function () {

end = beginX;

}

}

var begin = 0, end = 0;

setInterval(function () {

begin = begin + (end - begin) / 10;

t_mall.style.left = begin + 'px';

}, 10)

function $(id) {

return typeof id ? document.getElementById(id) : null;

}

}

</script>

</body>

</html>

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。

以上是 js实现缓动动画 的全部内容, 来源链接: utcz.com/p/218906.html

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