原生tab选项卡

<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title>原生tab选项卡</title>
	</head>
	<script type="text/javascript" src="js/jquery-3.3.1.min.js"></script>
	<style type="text/css">
		*{
			margin: 0;
			padding: 0;
		}
		.fatherDom{
			width: 1000px;
			margin: 0 auto;
		}
		.fatherDom .contentDom{
			margin:100px 0 0 0;
		}
		.fatherDom .contentDom li{
			width: 1000px;
			height: 300px;
			background: #FFF0FF;
			list-style: none;
			box-shadow: 0 2px 15px 0 rgba(186,186,186,0.50);
   			border-radius: 5px;
		}
		.fatherDom .pageDom{
			width: 400px;
			height: 50px;
			margin-top: 20px;
			list-style: none;
			border: 1px solid #ffae00;
			overflow: hidden;
			border-radius: 6px;
			border-right:none;
			float: right;
		}
		.fatherDom .pageDom li{
			list-style: none;
			float: left;
			text-align: center;
		    height: 50px;
		    line-height: 50px;
		    border-right: 1px solid #ffae00
		}
		.active{
			background: #FEF0F0;
			color: #333;
		}
		.none{
			display: none;
		}
		.block{
			display: block;
		}
	</style>
	<body>
		<div class="fatherDom">
			<ul class="contentDom">
				<li class="none">1111111111111</li>
				<li class="none">222222222</li>
				<li class="none">333333333</li>
				<li class="none">444444444</li>
				<li class="none">555555555</li>
			</ul>
			<ul class="pageDom" id="pageDom">

			</ul>
		</div>
	</body>
	<script type="text/javascript">
		window.onload=function(){
			pageEvent()
			pageItemClick()
			close()
		}
		//1，先动态给li赋值
		function pageEvent(){
			for(var i=1;i<6;i++){
				var eleLi=document.createElement('li');
				eleLi.innerHTML='第'+i+'项'
				document.getElementById('pageDom').appendChild(eleLi)
			}
                        //2，再计算有多少个li
			var liLength=$('.pageDom li').length
                        //3，获取大的ul的长度
			var pageDomWidth=$('.pageDom').width();
		        //4，算出平均宽度
			var itemWidth=(pageDomWidth/liLength)
		        //5，给每一个li添加宽
			$('.pageDom li').css("width",(itemWidth-1)+'px')
			$('.pageDom li').eq(0).addClass('active')
			$('.contentDom li').eq(0).addClass('block').removeClass('none')
		}
		function pageItemClick(){
			$('.pageDom li').click(function(){
				$(this).addClass('active').siblings().removeClass('active')
				var pageIndex=$(this).index()
				$('.contentDom li').eq(pageIndex).show().siblings().hide();
			})
		}
	</script>
</html>