html - 如何更改菜单栏中事件链接的背景颜色？

Question

我从中复制了以下代码 w3schools.com 并将其添加到我网站上的所有页面。导航工作正常，但菜单中事件链接的背景颜色没有改变。

我该如何解决这个问题？

ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
}
li {
  float: left;
}
a:link,
a:visited {
  display: block;
  width: 120px;
  font-weight: bold;
  color: #FFFFFF;
  background-color: #98bf21;
  text-align: center;
  padding: 4px;
  text-decoration: none;
  text-transform: uppercase;
}
a:hover,
a:active {
  background-color: #7A991A;
}

<ul>
  <li>
    <a href="/home.php">Home</a>
  </li>

  <li>
    <a href="/news.php">News</a>
  </li>
  <li>
    <a href="/contact.php">Contact</a>
  </li>
  <li>
    <a href="/about.php">About</a>
  </li>
</ul>

Answer 1

您需要在事件页面上添加一个 CSS 类。我在这里添加了 class="active"

Change CSS as below

a:hover,
a:active,
a.active {
  background-color: #7A991A;
}

On home.php change the navigation code as below.

<ul>
  <li>
    <a href="/home.php" class="active">Home</a>
  </li>

  <li>
    <a href="/news.php">News</a>
  </li>
  <li>
    <a href="/contact.php">Contact</a>
  </li>
  <li>
    <a href="/about.php">About</a>
  </li>
</ul>

On news.php make the change as below, Similarly for other pages

<ul>
  <li>
    <a href="/home.php">Home</a>
  </li>

  <li>
    <a href="/news.php" class="active">News</a>
  </li>
  <li>
    <a href="/contact.php">Contact</a>
  </li>
  <li>
    <a href="/about.php">About</a>
  </li>
</ul>