bootstrap-监听滚动实现头部跟随滚动

时间：2022-04-11 06:04:24

实现案例

<body  data-spy="scroll" data-target="#bs-example-navbar-collapse-1">

<div id='menu_wrap'>

    <div class='menu'>

         <nav class="navbar navbar-default" role="navigation">

         <div class="container">

            <div class="navbar-header">

            <a class="navbar-brand" href="#"  style="font-weight:bold">植被数据录入</a>

            </div>

            <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">

            <!-- <button type="button" class="close" data-dismiss="modal" data-target="#mychart2-zb"><span aria-hidden="true">&times;</span></button> -->

                    <button type="button" class="btn btn-primary" style="float: right;margin-right: 10px;margin-top: 5px;" data-dismiss="modal" data-target="#mychart2-zb"><span aria-hidden="true">保存</span></button>

                    <button type="button" class="btn btn-primary" style="float: right;margin-right: 10px;margin-top: 5px;" data-dismiss="modal" data-target="#mychart2-zb"><span aria-hidden="true">取消</span></button>

            </div>

        </div>

        </nav>

    </div>

</div>

</body>

css控制样式

.menu{

    width:100%;

    z-index:;

}

.menuFixed{

    position:fixed;

    top:;

    left:;

}

#menu_wrap{

    height:50px;

    width:100%;

}

js监听

    <script>

        $(window).scroll(function () {

            var menu_top = $('#menu_wrap').offset().top;

            if ($(window).scrollTop() >= menu_top) {

                $('.menu').addClass('menuFixed')

            }

            else {

                $('.menu').removeClass('menuFixed')

            }

        });

    </script>

导入js

    <script type="text/javascript" src="../bower_components/jquery/dist/jquery.min.js"></script>

    <script type="text/javascript" src="../bower_components/bootstrap/dist/js/bootstrap.min.js"></script>

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