javascript - HTML 和 CSS 新手 : Drop down menu not displaying

Question

您好，我正在创建一个网站导航菜单。我已经为我的其中一个链接实现了下拉选项，但它根本没有显示。我确信这是一个我忽略的简单修复，我们将不胜感激。

我只包含了相关的 HTML 和 CSS 代码。谢谢!

HTML:

<nav onmouseout="hide()">
<ul id="navMenu">
<li><a href="homepage.html">Home</a></li>
<li><span onmouseover="show(about)">About Us</span>
<div id="about" onmouseover="show(about)" style="visibilty:hidden;">
<a href="Darwin.html">Darwin</a>
<a href="Alex.html">Alex</a>
</div>
</li>
<li><a href="quote.html">Get a Quote</a></li>
<li><a href="contact.html">Contact Us</a></li>
</ul>
</nav>

CSS:

ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: #922e2e;
  margin-top: 4px;
  margin-bottom: 4px;
}

li {
  float: left;
}

li a, span {
  display: block;
  color: white;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

li a:hover {
  background-color: #111;
}

#navMenu div {
  position: absolute;
  visibility: hidden;
}

#navMenu div a {
  display: block;
  width: 500px;
  height: 50px;
  background-color: #922e2e;
  color: black;
  text-align: center;
  margin-bottom: 0px;
}

#navMenu div:hover {
	display: block;
	background-color: #7e8182;
}

Answer 1

您可以使用 CSS 完成此操作，无需使用 javaScript。检查下面更新的代码段

ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: #922e2e;
  margin-top: 4px;
  margin-bottom: 4px;
}

li {
  float: left;
}

li a, span {
  display: block;
  color: white;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

li a:hover {
  background-color: #111;
}

#navMenu div {
  position: absolute;
 display: none;
	background-color: #7e8182;
}

#navMenu div a {
  display: block;
  width: 200px;
  height: 50px;
  background-color: #922e2e;
  color: black;
  text-align: center;
  margin-bottom: 0px;
}

#navMenu li:hover div{
	display: block;
}

<nav>
<ul id="navMenu">
<li><a href="homepage.html">Home</a></li>
<li><span>About Us</span>
<div id="about">
<a href="Darwin.html">Darwin</a>
<a href="Alex.html">Alex</a>
</div>
</li>
<li><a href="quote.html">Get a Quote</a></li>
<li><a href="contact.html">Contact Us</a></li>
</ul>
</nav>