JS监听滚动条进度

时间：2023-04-18 20:41:14

HTML部分：

<!DOCTYPE html>

<html>

<head>

    <meta charset="UTF-8">

    <script src="http://apps.bdimg.com/libs/jquery/2.1.1/jquery.min.js"></script>

</head>

<body>

<div>

    <h2>scroll</h2>

    <div id="nav">

        <div class="f1">floor1</div>

        <div class="f2">floor2</div>

        <div class="f3">floor3</div>

        <div class="f4">floor4</div>

        <div class="f5">floor5</div>

    </div>

    <p>

        页面结构

    </p>

    <div class="main">

        <div id="f1">测试1</div>

        <div id="f2">测试2</div>

        <div id="f3">测试3</div>

        <div id="f4">测试4</div>

        <div id="f5">测试5</div>

    </div>

</div>

</body>

</html>

CSS部分：

    <style>

        .main div {

            height: 970px;

            width: 300px;

            margin: 20px;

            background-color: #C0C0C0;

        }

        #nav {

            position: fixed;

            width: 100px;

            height: 200px;

            top: 40%;

            right: 10px;

        }

        #nav div {

            cursor: pointer;

            text-align: center;

        }

    </style>

JS部分：

<script>

    $(function () {

        $(window).scroll(function () {//为页面添加页面滚动监听事件

            var wst = $(window).scrollTop(); //滚动条距离顶端值

            for (var i = 1; i < 6; i++) {             //加循环

                if ($("#f" + i).offset().top <= wst + 10) { //判断滚动条位置

                    $('#nav div').css("background-color", "white");

                    $(".f" + i).css("background-color", "red");

                }

            }

        });

        $('#nav div').click(function () {

            $('html').animate({scrollTop: $("#" + this.className).offset().top}, 500);

            // $("#" + this.className)[0].scrollIntoView(true);//h5 scrollIntoView()

        });

    });

</script>

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