Question

这是滚动效果的Java语言

<script type="text/javascript">
$(document).ready(function() {
$(window).scroll(function() {
if($(this).scrollTop() < 200) {
  $(".cta").css({"opacity" : "0"})
}
else {
  $(".cta").css({"opacity" : "1"})
}
})
})
</script>

以下是按钮的CSS标记

/* call to action in service pages */
a.cta.btn {
    position: fixed;
    right: 4vw;
    bottom: 4vw;
    z-index: 1;
    background: #3e5132;
    color: white;
    border: 2px solid white;
}

a.cta.btn:hover {
    background: white;
    color: #3e5132 !important;
    border: 2px solid #3e5132;
}

这是带有示例的页面的URL。 https://new.driveyourdevelopment.com/services/motivational-speaker-denver/

Answer 1

嗨，我只是尝试如下：

$(document).ready(function() {

  $(".cta").css({"opacity" : "0"})
$(window).scroll(function() {
if($(this).scrollTop() < 200) {
  $(".btn").removeClass("cta")
}
else {
  $(".btn").addClass("cta")
}
})
})

body {
  background: #20262E;
  padding: 20px;
  color:#fff;
  font-family: Helvetica;
}
span {
  margin-right:20px;
  color:#fff;
}
.btn {
    display: inline-block;
    padding: 1.5rem 3rem;
    border: 1px solid black;
    margin-bottom: 0;
    font-size: 21px;
    font-weight: 400;
    line-height: 1.42857143;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    -ms-touch-action: manipulation;
    touch-action: manipulation;
    cursor: pointer;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    background-image: none;
    border: .15rem solid #3e5132;
    /* border-radius: 4px; */
}
a.btn {
    position: fixed;
    opacity:0;
    right: 4vw;
    bottom: 4vw;
    z-index: 1;
    background: #3e5132;
    color: white;
    border: 2px solid white;
    opacity:0 !important;
}
a.cta {
    opacity:1 !important;
    -webkit-transition: all ease-in-out .5s;
    transition: all ease-in-out .5s;
    -webkit-transition: all ease-in-out .5s;
    }
a.btn:hover {
    background: white;
    color: #3e5132 !important;
    border: 2px solid #3e5132;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div id="banner-message">
  <span>Hello World</span>
  <span>Hello World</span>
  <span>Hello World</span>
  <span>Hello World</span>
</div>
<a href="#contact" class="btn">Contact Victoria Now</a>









<div class="section services" id="section2">
      		<div class="container">
      				<div class="heading col-md-12 col-xs-12 services">
                <h2>Start Leading Your Business Towards Success</h2>
                <p></p><p>Are your employees struggling with communication, bad customer service, slow response time, teamwork, or having problems with other people? Yes? That means your employees are having human behavior and communication issues, slowing down the growth of your company. Your company starts to grow when you help your team communicate better with your clients and each other.</p>
<p>You help your employees communicate better by teaching them the basics of human behavior and communication. When they understand human behavior and have good communication skills they’ll perform at their best.</p>
<p>The human element is the number one cause for a company’s success or failure. You can have the best resources, tools, procedures, or connections but if your employees don’t know how to communicate, your company’s in trouble.</p>
<p>Helping your team communicate better motivates them to work harder too. They communicate better with your clients but also with each other. Communication skills help build friendships and relationships. If they have good friendships at work, your employees will be more motivated to do a good job and show up to work.</p>
<p>To improve your employees’ performance and motivate them you need to start thinking about their emotions, problems, aspirations, barriers, and goals. Start getting to know them better. They need more than just a boss or co-worker.</p>
<p></p>
                <h3 class="light hidden-xs">Lead</h3>
              </div>
              <!-- heading -->
          </div>
          <!-- container -->

      </div>
      
      

<div class="section services" id="section2">
      		<div class="container">
      				<div class="heading col-md-12 col-xs-12 services">
                <h2>Start Leading Your Business Towards Success</h2>
                <p></p><p>Are your employees struggling with communication, bad customer service, slow response time, teamwork, or having problems with other people? Yes? That means your employees are having human behavior and communication issues, slowing down the growth of your company. Your company starts to grow when you help your team communicate better with your clients and each other.</p>
<p>You help your employees communicate better by teaching them the basics of human behavior and communication. When they understand human behavior and have good communication skills they’ll perform at their best.</p>
<p>The human element is the number one cause for a company’s success or failure. You can have the best resources, tools, procedures, or connections but if your employees don’t know how to communicate, your company’s in trouble.</p>
<p>Helping your team communicate better motivates them to work harder too. They communicate better with your clients but also with each other. Communication skills help build friendships and relationships. If they have good friendships at work, your employees will be more motivated to do a good job and show up to work.</p>
<p>To improve your employees’ performance and motivate them you need to start thinking about their emotions, problems, aspirations, barriers, and goals. Start getting to know them better. They need more than just a boss or co-worker.</p>
<p></p>
                <h3 class="light hidden-xs">Lead</h3>
              </div>
              <!-- heading -->
          </div>
          <!-- container -->

      </div>

如果仍有问题，请告诉我

谢谢

Answer 2

您的按钮类并非以不透明度0开头，因此从一开始就可见。按照以下步骤编辑CSS：

a.cta.btn {
   position: fixed;
   opacity: 0
   right: 4vw;
   bottom: 4vw;
   z-index: 1;
   background: #3e5132;
   color: white;
   border: 2px solid white;
}

您还可以按照其他答案中的建议使用“ display：none”，这将产生相同的效果。解决方案的区别在于动画之间。更改动画的不透明度可以进行动画处理，从而平滑效果，同时更改显示属性会立即发生

如何修复滚动效果以使按钮仅在滚动后才显示？

2 个答案: