为什么我在悬停后无法看到特定部分？

分类：编程问答

如何解决为什么我在悬停后无法看到特定部分？

我做了一个简单的下拉菜单。当我将鼠标悬停在“社交媒体”部分时，我想显示一些社交图标，如下拉菜单。我隐藏了那些社交媒体图标部分。我想让它只在悬停在“社交媒体”部分时可见。但它不起作用。悬停后图标部分不显示。请帮帮我。我找不到我的问题。

HTML

 <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <meta name="viewport" content="width=device-width,initial-scale=1.0">
        <title>Menu</title>
    
        <link rel="stylesheet" href="./menu.css">
    
        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.2/css/all.min.css">
    
        <link rel="preconnect" href="https://fonts.gstatic.com">
        <link href="https://fonts.googleapis.com/css2?family=Lato&display=swap" rel="stylesheet">
    
    </head>
    <body>
        <div class="main-menu">
            <ul>
                <li><a href="#">Home</a>
                <ul>
                    <li><a href="#">Home</a></li>
                    <li><a href="#">Home</a></li>
                    <li><a href="#">Home</a></li>
                    <li><a href="#">Home</a></li>
                    <li><a href="#">Home</a></li>
                </ul>
                </li>
                <li><a href="#">About</a></li>
                <li><a href="#">Service</a></li>
                <li><a href="#">Contact</a></li>
                <li><a href="#">Register</a></li>
            </ul>
        </div>
    
        <div class="social">
            <ul>
                <li><a href="#">Social Media</a>
                <ul>
                    <li><a href="#"><i class="fab fa-facebook-f"></i></a></li>
                    <li><a href="#"><i class="fab fa-instagram"></i></a></li>
                    <li><a href="#"><i class="fab fa-twitter"></i></a></li>
                    <li><a href="#"><i class="fab fa-youtube"></i></a></li>
                </ul>
                </li>
            </ul>
        </div>
    </body>
    </html>

CSS

*{
    margin: 0;
    padding: 0;
}

.main-menu{
    background: black;
}
.main-menu ul {
    text-align: center;
}
.main-menu ul li {
    display: inline-block;
    position: relative;
}
.main-menu ul li a {
    color: white;
    text-decoration: none;
    padding: 15px 56px;
    margin-left: -5px;
    border-left:1px rgb(70,67,67) solid;
    display: inline-block;
    font-family: 'Lato',sans-serif;
}

.main-menu ul li :last-child{
    border-right:1px rgb(70,67) solid;
}

.main-menu ul li:hover>a{
    background-color: rgb(70,67);
    transition: .5s;
}

/* dropdown menu*/

.main-menu ul li ul{
    position: absolute;
    left: -4px;
    top:100%;
    width: 300px;
    background: black;
    visibility: hidden;
    opacity: 0;
    transform: scaley(0);
    transform-origin: top;

}

.main-menu ul li ul li{
    display: block;
    padding-left: 5px;
}

.main-menu ul li ul li a{
    display: block;
    border:none;
    border-bottom: 1px solid rgb(70,67);
}

.main-menu ul li ul li:last-child{
    border-right: none;
}

/* hover style */

.main-menu ul li:hover ul{
    visibility: visible;
    opacity: 1;
    transition: .5s;
    transform: scaley(1);

}

/* social media */

.social{
    text-align: center;   
    margin-top: 50px; 
}
.social ul{
    list-style: none;
    display: inline-block;
}
.social ul li{
    height: 42px;
    width:225px;
    background-color: black;
    border-radius: 35px;
    position: relative;
}
.social ul li a{
    text-decoration: none;
    color: white;
    font-family: 'Lato',sans-serif;
    font-size: 35px;
}
.social ul li:hover{
    background-color: rgb(114,114,114);
    transition: .5s;
}

/* dropdown */


.social ul li ul{
    position: absolute;
    top: 140%;   
    left: -145px;
    width: 500px;
    visibility: hidden;
    opacity: 0;
}

.social ul li ul li{
    display: inline-block;
    height: 80px;
    width: 80px;
    line-height: 80px;
    border-radius: 50%;
    margin-left: 22px;
}
.social ul li ul li a{
    font-size: 45px;
    color: white;
    padding:0px;
}


/* hover */
.social ul li :hover .social ul li ul{
    visibility: visible;
    opacity: 1;
}

解决方法

给你。您使用悬停部分作为 .social ul li:hover .social ul li ul 而它应该像 .social:hover ul li ul 

* {
  margin: 0;
  padding: 0;
}

.main-menu {
  background: black;
}

.main-menu ul {
  text-align: center;
}

.main-menu ul li {
  display: inline-block;
  position: relative;
}

.main-menu ul li a {
  color: white;
  text-decoration: none;
  padding: 15px 56px;
  margin-left: -5px;
  border-left: 1px rgb(70,67,67) solid;
  display: inline-block;
  font-family: 'Lato',sans-serif;
}

.main-menu ul li :last-child {
  border-right: 1px rgb(70,67) solid;
}

.main-menu ul li:hover>a {
  background-color: rgb(70,67);
  transition: .5s;
}


/* dropdown menu*/

.main-menu ul li ul {
  position: absolute;
  left: -4px;
  top: 100%;
  width: 300px;
  background: black;
  visibility: hidden;
  opacity: 0;
  transform: scaley(0);
  transform-origin: top;
}

.main-menu ul li ul li {
  display: block;
  padding-left: 5px;
}

.main-menu ul li ul li a {
  display: block;
  border: none;
  border-bottom: 1px solid rgb(70,67);
}

.main-menu ul li ul li:last-child {
  border-right: none;
}


/* hover style */

.main-menu ul li:hover ul {
  visibility: visible;
  opacity: 1;
  transition: .5s;
  transform: scaley(1);
}


/* social media */

.social {
  text-align: center;
  margin-top: 50px;
}

.social ul {
  list-style: none;
  display: inline-block;
}

.social ul li {
  height: 42px;
  width: 225px;
  background-color: black;
  border-radius: 35px;
  position: relative;
}

.social ul li a {
  text-decoration: none;
  color: white;
  font-family: 'Lato',sans-serif;
  font-size: 35px;
}

.social ul li:hover {
  background-color: rgb(114,114,114);
  transition: .5s;
}


/* dropdown */

.social ul li ul {
  position: absolute;
  top: 140%;
  left: -145px;
  width: 500px;
  visibility: hidden;
  opacity: 0;
}

.social ul li ul li {
  display: inline-block;
  height: 80px;
  width: 80px;
  line-height: 80px;
  border-radius: 50%;
  margin-left: 22px;
}

.social ul li ul li a {
  font-size: 45px;
  color: white;
  padding: 0px;
}


/* hover */

.social:hover ul li ul {
  visibility: visible;
  opacity: 1;
}
<div class="main-menu">
  <ul>
    <li><a href="#">Home</a>
      <ul>
        <li><a href="#">Home</a></li>
        <li><a href="#">Home</a></li>
        <li><a href="#">Home</a></li>
        <li><a href="#">Home</a></li>
        <li><a href="#">Home</a></li>
      </ul>
    </li>
    <li><a href="#">About</a></li>
    <li><a href="#">Service</a></li>
    <li><a href="#">Contact</a></li>
    <li><a href="#">Register</a></li>
  </ul>
</div>

<div class="social">
  <ul>
    <li><a href="#">Social Media</a>
      <ul>
        <li><a href="#"><i class="fab fa-facebook-f"></i></a></li>
        <li><a href="#"><i class="fab fa-instagram"></i></a></li>
        <li><a href="#"><i class="fab fa-twitter"></i></a></li>
        <li><a href="#"><i class="fab fa-youtube"></i></a></li>
      </ul>
    </li>
  </ul>
</div>

Working Fiddle

,

用这个改变你最后的 css 选择器

await Cart.findOne({ client: userId 
  }).populate("products");

尽管您现在会遇到无法点击图标的问题，因为它们有 /* hover */ .social:hover ul li ul{ visibility: visible; opacity: 1; } ，如果您尝试将鼠标悬停在它们上方，position: absolute; 上的悬停将被移除

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