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jq京东楼层效果
kong
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1095 people have browsed it

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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>京东楼层效果</title>
</head>
<body>
<style>
    *{
    padding: 0;
    margin: 0;
    }
    .box{
    width: 500px;
    margin: 0 auto;
    }
    .footr{
    background-color: blue;
    margin-bottom: 10px;
    height: 400px;
    }
    ul{
    list-style-type: none;
    padding: 0;
    margin: 0;
    position: fixed;
    left: 0;
    top: 30%;
    display: none;
    }
    ul li{
    line-height: 50px;
    text-align: center;
    width: 100px;
    background-color: yellow;
    }
    .dingbu{
    height: 400px;
    background-color: pink;
    margin-bottom: 10px;
    }
    
    ul li.cur{
    background-color: blue;
    }
</style>
    <ul>
        <li>1</li>
        <li>2</li>
        <li>3</li>
        <li>4</li>
        <li>5</li>
    </ul>
    <div class="box">

		<div class="dingbu">
			顶部
		</div>
		<div class="footr">
			1
		</div>
		<div class="footr">
			2
		</div>
		<div class="footr">
			3
		</div>
		<div class="footr">
			4
		</div>
		<div class="footr">
			5
		</div>
		<div class="dingbu">
			顶部
		</div>
		<div class="dingbu">
			顶部
		</div>
		<div class="dingbu">
			顶部
		</div>
	</div>
<script src="jquery.min.js"></script>
</body>
</html>
$(function(){
        //获取滚动条滚动事件
	$(window).scroll(function(event) {
		//获取滚动的高度		
		var scrollTop = $(window).scrollTop();
                        //判断滚动到第一个.footr的静位置 ul显示
		    if(scrollTop > $(".footr").eq(0).offset().top - 200){
			$("ul").stop(true).fadeIn();
		    }else{
			$("ul").stop(true).fadeOut()
		    };
                        //遍历滚动.footr的静位置 让楼层追加样式
		    $(".footr").each(function(i){
			if(scrollTop>=$(this).offset().top - 100){
				$("ul li").eq(i).addClass("cur").siblings().removeClass("cur")
					}
			});
		     });

                        //遍历楼层点击事件
		    $("ul li").each(function(i){
			$(this).click(function(){
			    //使楼层滚动到相对应的位置
				$('body,html').animate({
					scrollTop: $(".footr").eq($(this).index()).offset().top
				},1000)
			})
		    });

		})


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