Question

我有以下图标......当鼠标悬停在圆形图标上时...我想在其下方显示图标向下滚动。但是下面的js显示了两个图标向下滚动。我怎样才能只显示下面特定的一个？

＆＃13;

// Show Scroll Arrow Down on hover
$('.container-flow-wrapper .circle-icon')
.mouseenter(function() {
    $('.container-flow-wrapper .icon-scroll-down').css({'visibility': 'visible'}); 
})
.mouseleave(function() {
    $('.container-flow-wrapper .icon-scroll-down').css({'visibility': 'hidden'}); 
});

＆＃13;

<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<div class="col-md-12">         
    <div class="col-sm-6 align-center">
        <div class="container-flow-wrapper">
            <div class="container-flow">    
                <i class="fa fa-globe fa-5x circle-icon"/></i>
            </div>
            <i class="fa fa-arrow-down icon-scroll-down"></i>   
        </div>  
    </div>                  
    <div class="col-sm-6 align-center">
        <div class="container-flow-wrapper">
            <div class="container-flow">    
                <i class="fa fa-user fa-5x circle-icon"/></i>
            </div>
            <i class="fa fa-arrow-down icon-scroll-down"></i>       
        </div>              
    </div>
</div>

＆＃13;

Answer 1

使用内容相关this关键字，但请阅读第二部分：

$(function() {
  // Show Scroll Arrow Down on hover
  $('.container-flow-wrapper')
    .mouseenter(function() {
      $(this).find('.icon-scroll-down').css({
        'visibility': 'visible'
      });
    })
    .mouseleave(function() {
      $(this).find('.icon-scroll-down').css({
        'visibility': 'hidden'
      });
    });
});

<script src="https://code.jquery.com/jquery-2.2.4.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" />
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" />
<div class="col-md-12">
  <div class="col-sm-6 align-center">
    <div class="container-flow-wrapper">
      <div class="container-flow">
        <i class="fa fa-globe fa-5x circle-icon"></i>
      </div>
      <i class="fa fa-arrow-down icon-scroll-down"></i>
    </div>
  </div>
  <div class="col-sm-6 align-center">
    <div class="container-flow-wrapper">
      <div class="container-flow">
        <i class="fa fa-user fa-5x circle-icon"></i>
      </div>
      <i class="fa fa-arrow-down icon-scroll-down"></i>
    </div>
  </div>
</div>

但我更喜欢基于 CSS的解决方案。见下文：

速度更快。
JavaScript是一种用于显示目的的过度杀伤。
您刚刚使用JavaScript更改CSS部分，这是一项代价高昂的操作。

.container-flow-wrapper .icon-scroll-down {visibility: hidden;}
.container-flow-wrapper:hover .icon-scroll-down {visibility: visible;}

<script src="https://code.jquery.com/jquery-2.2.4.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" />
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" />
<div class="col-md-12">
  <div class="col-sm-6 align-center">
    <div class="container-flow-wrapper">
      <div class="container-flow">
        <i class="fa fa-globe fa-5x circle-icon"></i>
      </div>
      <i class="fa fa-arrow-down icon-scroll-down"></i>
    </div>
  </div>
  <div class="col-sm-6 align-center">
    <div class="container-flow-wrapper">
      <div class="container-flow">
        <i class="fa fa-user fa-5x circle-icon"></i>
      </div>
      <i class="fa fa-arrow-down icon-scroll-down"></i>
    </div>
  </div>
</div>

Answer 2

您需要定位要悬停的项目的子元素。这样的事情应该有效：

$('.container-flow-wrapper .circle-icon')
.mouseenter(function() {
    $(this).parents().children('.icon-scroll-down').css({'visibility': 
'visible'}); 
})
.mouseleave(function() {
    $(this).parents().children('.icon-scroll-down').css({'visibility': 
'hidden'}); 
});

请注意使用this关键字。当用括号括起来时，如$(this)那样用括号括起来，它会说＆＃34;只针对我目前悬停在＆＃34;上的元素。

在鼠标悬停时显示特定的向下滚动图标？

2 个答案: