juery+css菜单滑动效果

1、div代码

<div class="nav">
	<div class="on"></div>
    <ul>
        <li>首页</li>
        <li>技巧</li>
        <li>方法</li>
        <li>扩展</li>
    </ul>
</div>

2、css代码

* {
	margin:0;
	padding:0;
}
body {
	background-color:#b6b3b3;
}
li {
	list-style:none;
}
.nav {
	width:440px;
	height:60px;
	margin:100px auto;
	border-radius:70px;
	position:relative;
}
.nav ul {
	display:flex;
	align-items:center;
}
.nav ul li {
	width:100px;
	height:50px;
	line-height:50px;
	box-sizing:border-box;
	border-radius:10px;
	text-align:center;
	color:#333;
	cursor:pointer;
	margin: 0 5px
}
.nav .on{
	width:100px;
	height:50px;
	border-radius:10px;
	background:#f00;
	position:absolute;
	left:35px;
	top:0;
	z-index:-1;
	transition:all .3s;
	margin: 0 5px;
}

3、js代码

$(function() {
    var left = 0;
    $('.nav ul li').click(function() {
        left = this.offsetLeft;
        $('.nav .on').css({
            left: left - 10 + 'px',
        })
    })
})