javascript - jquery悬停功能显示和隐藏元素

Question

我有一个悬停功能，可以显示和隐藏我的子菜单，直到有人悬停在它们上面。

问题是，当我尝试将鼠标向下移动到显示它的菜单时，它又消失了。

谁能指出我在这里做错了什么？

$(document).ready(function() {
  $('.menu-Link > a').hover(function() {
    $(this).next('.menu').show();
  }, function() {
    $(this).next('.menu').hide();
  });
});

nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  /*background-color: #333333;*/
  background-color: transparent;
  transition: 0.2s;
}
nav ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: transparent;
  display: inline-block;
}
nav ul li {
  float: left;
}
nav ul li a.link {
  display: block;
  color: black;
  text-align: center;
  padding: 24px 16px;
  text-decoration: none;
  transition: 0.2s;
  font-weight: bold;
  text-transform: uppercase;
  position: relative;
}
nav ul li div.arrow-down {
  float: right;
  width: 0;
  height: 0;
  margin-left: 5px;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 5px solid #fff;
  margin-top: 10px;
  transition: 0.2s;
}
nav ul li div.menu {
  display: none;
  z-index: 999;
  position: relative;
  background-color: #fff;
  box-shadow: 0px 0px 5px rgba(0, 0, 0, 0.2);
  padding: 15px 0;
  margin-top: -15px;
}
nav ul li div.menu a {
  color: #333333;
  padding-left: 15px;
}
nav ul li a.link:hover {
  color: #808080;
  text-decoration: none;
  transition: 0.2s;
}
nav ul li a.link:hover div.arrow-down {
  border-top: 5px solid #808080;
  transition: 0.2s;
}
nav ul li:first-child {
  padding-left: 100px;
}
nav ul.right {
  float: right;
}
nav ul.right li:last-child {
  padding-right: 100px;
}
nav.color {
  background-color: #333333;
  transition: 0.2s;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<nav>
  <ul class="left">
    <li class="menu-Link">
      <a href="" class="link">Home</a>
      <div class="menu">
        <a href="">subcat.Title</a>
      </div>
    </li>
    <li class="menu-Link">
      <a href="" class="link">Test</a>
      <div class="menu">
        <a href="">subcat.Title</a>
      </div>
    </li>
  </ul>
  <ul class="right">
    <li><a href="/">Basket</a>
    </li>
  </ul>
</nav>

Answer 1

问题是因为事件附加到 a 元素，因此当用户尝试将鼠标悬停在出现的菜单上时，将调用悬停的 mouseout 部分a 和 JS 代码试图再次隐藏菜单。要解决此问题，请将 hover() 事件附加到包含 a 和菜单的元素。在这种情况下，.menu-link 元素本身。您还需要将 next() 更改为 find() 以适应更改。试试这个:

$(document).ready(function() {
  $('.menu-Link').hover(function() {
    $(this).find('.menu').show();
  }, function() {
    $(this).find('.menu').hide();
  });
});

nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  /*background-color: #333333;*/
  background-color: transparent;
  transition: 0.2s;
}
nav ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: transparent;
  display: inline-block;
}
nav ul li {
  float: left;
}
nav ul li a.link {
  display: block;
  color: black;
  text-align: center;
  padding: 24px 16px;
  text-decoration: none;
  transition: 0.2s;
  font-weight: bold;
  text-transform: uppercase;
  position: relative;
}
nav ul li div.arrow-down {
  float: right;
  width: 0;
  height: 0;
  margin-left: 5px;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 5px solid #fff;
  margin-top: 10px;
  transition: 0.2s;
}
nav ul li div.menu {
  display: none;
  z-index: 999;
  position: relative;
  background-color: #fff;
  box-shadow: 0px 0px 5px rgba(0, 0, 0, 0.2);
  padding: 15px 0;
  margin-top: -15px;
}
nav ul li div.menu a {
  color: #333333;
  padding-left: 15px;
}
nav ul li a.link:hover {
  color: #808080;
  text-decoration: none;
  transition: 0.2s;
}
nav ul li a.link:hover div.arrow-down {
  border-top: 5px solid #808080;
  transition: 0.2s;
}
nav ul li:first-child {
  padding-left: 100px;
}
nav ul.right {
  float: right;
}
nav ul.right li:last-child {
  padding-right: 100px;
}
nav.color {
  background-color: #333333;
  transition: 0.2s;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<nav>
  <ul class="left">
    <li class="menu-Link">
      <a href="" class="link">Home</a>
      <div class="menu">
        <a href="">subcat.Title</a>
      </div>
    </li>
    <li class="menu-Link">
      <a href="" class="link">Test</a>
      <div class="menu">
        <a href="">subcat.Title</a>
      </div>
    </li>
  </ul>
  <ul class="right">
    <li><a href="/">Basket</a>
    </li>
  </ul>
</nav>

另请注意，您可以单独在 CSS 中实现此目的，而无需任何 JS 代码，只需删除 hover() 处理程序并将此行添加到您的 CSS 中:

nav ul li:hover div.menu {
  display: block;
}