导航栏点击变色js

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>导航栏点击变色示例</title>
<style>
  .nav-item {
    padding: 10px;
    cursor: pointer;
    color: black;
  }
  .active {
    background-color: lightblue;
    color: white;
  }
</style>
</head>
<body>

<ul>
  <li class="nav-item" onclick="changeColor(this)">首页</li>
  <li class="nav-item" onclick="changeColor(this)">关于我们</li>
  <li class="nav-item" onclick="changeColor(this)">联系我们</li>
</ul>

<script>
function changeColor(element) {
  // 移除所有导航项的 active 类
  var navItems = document.getElementsByClassName('nav-item');
  for (var i = 0; i < navItems.length; i++) {
    navItems[i].classList.remove('active');
  }
  // 给当前点击的元素添加 active 类
  element.classList.add('active');
}
</script>

</body>
</html>