Javascript 当用户向下滚动时，如何使第一个视图中的向下箭头消失？_Javascript_Jquery_Display

Javascript 当用户向下滚动时，如何使第一个视图中的向下箭头消失？

javascript jquery

Javascript 当用户向下滚动时，如何使第一个视图中的向下箭头消失？,javascript,jquery,display,Javascript,Jquery,Display,我希望当用户向下滚动页面时，向下箭头图标消失。虽然我在stackoverflow的另一个问题上搜索了它，但我找不到解决方案。我编写了jQuery代码。我不确定这是否正确这是小提琴上的代码 main.js $(document).ready(() => { $('#slideshow .slick').slick({ autoplay: true, autoplaySpeed: 2000, dots: true, });

我希望当用户向下滚动页面时，向下箭头图标消失。虽然我在stackoverflow的另一个问题上搜索了它，但我找不到解决方案。我编写了jQuery代码。我不确定这是否正确

这是小提琴上的代码

main.js

$(document).ready(() => {
    $('#slideshow .slick').slick({
        autoplay: true,
        autoplaySpeed: 2000,
        dots: true,
    });
});

$(document).ready(() => {
    $('#userReview .slick').slick({
        autoplayhttps://jsfiddle.net/92mtjzew/#: true,
        autoplaySpeed: 8000,
        dots: true,
    });
});

$(window).scroll(function(){
    if($(".box").toggle($(this).scrollTop() === 0) || ($(this).scrollTop() > 0)) {
       $('.box').show();
   } else {
       $('.box').hide();
   }
});

index.html

 <!DOCTYPE html>
 <html lang="en">
 <head>
    <meta charset="UTF-8">
    <title>Tutorial</title>
    <link rel="stylesheet" type="text/css" href="css/style.css">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="css/font-awesome.min.css">
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/slick-carousel/1.9.0/slick.min.css">
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/slick-carousel/1.9.0/slick-theme.min.css">
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css">
 </head>
 <body>
   <div id="header">
    <div class="logo">
    <h1><img src="img/logo.png" widht="473px" height="50px"></h1>
    </div>
    <div class="nav">
        <label for="toggle">&#9776;</label>
        <input type="checkbox" id="toggle" />
        <div class="menu">
            <a href="http://joeynamiki.com/" target="_blank">Work</a>
            <a href="about.php">About Us</a>
            <a href="#">Services</a>
            <a href="https://medium.com/@wcgwd1" target="_blank">Blog</a>
            <a href="contact.php"><span>Contact Us</span></a>
        </div>
    </div>
    </div><!-- /#header -->

    <section id="slideshow">
        <div class="slick">
            <div><img src="img/image1.jpg" width="1274px" height="640px" alt=""></div>
            <div><img src="img/image2.jpg" width="1274px" height="640px" alt=""></div>
            <div><img src="img/image3.jpg" width="1274px" height="640px" alt=""></div>
        </div>
    </section>

    <div class="box">
        <span onclick="scrollDown()"></span>
        <span onclick="scrollDown()"></span>
        <span onclick="scrollDown()"></span>
    </div>

    <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/slick-carousel/1.9.0/slick.min.js"></script>
<script src="js/main.js"></script>
<script>
function scrollDown(){
    var businessPage = document.getElementById("businessPage");
    businessPage.scrollIntoView();
}
</script>
</body>
</html>

试试下面的例子

.hidden{display:none！重要；}

$(document).ready(function(){       
    var scroll_pos = 0;
    $(document).scroll(function() { 
        scroll_pos = $(this).scrollTop();
        if(scroll_pos > 210) {
            $('.box').removeClass("hidden");
        } else {
            $('.box').addClass("hidden");
        }
   });
});

我会努力做到的！

$(document).ready(function(){       
    var scroll_pos = 0;
    $(document).scroll(function() { 
        scroll_pos = $(this).scrollTop();
        if(scroll_pos > 210) {
            $('.box').removeClass("hidden");
        } else {
            $('.box').addClass("hidden");
        }
   });
});