导航条定位和屏幕滚动页面的展示 

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <script src="jquery.js"></script>
    <style>
        *{
            padding: 0;
            margin: 0;
            list-style: none;
        }
        .header{
            width: 100Vw;
            height: 50px;
            background: gray;
        }
        .con{
            width: 100vw;
            overflow: hidden;
            position: relative;
            margin: 20px 0 0 0;
        }
        .left{
            width: 15%;
            top: 0;
            left: 50px;
            border-left: 1px solid #E0E6ED;
            border-top: 1px solid #E0E6ED;
        }
        .positionAbs{
            position: absolute;
        }
        .left p{
            width: 100%;
            height: 48px;
            background: #FFF;
            border-bottom: 1px solid #E0E6ED;
            border-right: 1px solid #E0E6ED;
            font-size: 16px;
            color: #333333;
            letter-spacing: 1px;
            line-height: 48px;
            text-align: center;
            cursor: pointer;
        }
        .left p.check{
            background: #04388B;
            color: #FFFFFF;
        }
        .right{
            float: right;
            width: 70%;
        }
        .rightCon{
            width: 100%;
            height: 200px;
            background: pink;
            color:#fff;
            font-size: 30px;
            line-height: 200px;
            text-align: center;
            margin: 0 0 20px 0;
        }
        .bottom{
            width: 100vw;
            height: 260px;
            background: #ccc;
            text-align: center;
            font-size: 30px;
            line-height: 260px;
        }
        .postionFixed{
            position: fixed;
        }
    </style>
    <title>Document</title>
</head>
<body>
    <div class="header">

    </div>
    <div class="con">
        <div class="left positionAbs">
            <p class="check">第一个</p>
            <p>第二个</p>
            <p>第三个</p>
            <p>第四个</p>
            <p>第五个</p>
        </div>
        <div class="right">
            <div class="rightCon">
                这是第一个对应的内容
            </div>
            <div class="rightCon">
                这是第二个对应的内容
            </div>
            <div class="rightCon">
                这是第三个对应的内容
            </div>
            <div class="rightCon">
                这是第四个对应的内容
            </div>
            <div class="rightCon">
                这是第五个对应的内容
            </div>
        </div>
    </div>
    <div class="bottom">
        底部
    </div>
    <script>
        //点击左侧导航条跳转到对应到块
        $('.left p').click(function(){
            var i = $('.left p').index(this);
            $(this).addClass('check').siblings().removeClass('check');
            var h = $('.rightCon').eq(i).offset().top;
            $(window).scrollTop(h);
        })
        //鼠标滚动的时候自动定位到哪个导航条下
        $(window).scroll(function(){
            var top = $(window).scrollTop();
            var height = $(document).height();
            if (top<70) {
                $('.left').removeClass('postionFixed').addClass('positionAbs');
            }else if(top < height-500){
                $('.left').removeClass('positionAbs').addClass('postionFixed');
                for (var i = 0; i < $('.rightCon').length; i++) {
                    console.log('i',i, $('.rightCon').eq(i).offset().top,top);
                    if (top >= $('.rightCon').eq(i).offset().top) {
                        $('.left p').eq(i).addClass('check').siblings().removeClass('check');
                    }
                }
            }else{
                $('.left').removeClass('postionFixed').addClass('positionAbs');
            }
        })
    </script>
</body>
</html>

 

posted @ 2017-12-06 13:59  赛赛大人  阅读(318)  评论(0)    收藏  举报