响应式底部导航菜单中添加固定定位版权div的实现咨询

可行实现方案 #

核心调整逻辑

• 调整版权元素的位置：把#copyright从导航栏最前面移到所有导航链接之后，菜单展开时会自然排在所有选项下方
• 优化版权默认样式：取消绝对定位，改用浮动和行高实现导航栏内的垂直居中，大屏下不会被右侧菜单项遮挡
• 小屏适配：屏幕宽度<=600px且菜单展开时，取消导航栏的固定定位，让整个导航栏变为普通文档流元素，排在页面内容之后，版权就会显示在整个页面的最底部
• 增加body底部内边距，避免默认状态下固定导航栏遮挡页面主体内容

修改后完整代码

HTML

<!DOCTYPE html>
<html>
<head>
  <meta name="viewport" content="width=device-width, initial-scale=1">
</head>
<body>
  <div class="navbar" id="myNavbar">
    <a href="#home" class="active">Home</a>
    <a href="#news">News</a>
    <a href="#contact">Contact</a>
    <a href="#about">About</a>
    <a href="javascript:void(0);" style="font-size:15px;" class="icon" onclick="myFunction()">&#9776;</a>
    <!-- 版权移到所有链接后面 -->
    <div id="copyright">© domain.com</div>
  </div>

  <div style="padding-left:16px">
    <h2>Responsive Bottom Navbar Example</h2>
    <p>Resize the browser window to see how it works.</p>
  </div>
</body>
</html>

CSS

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  /* 新增：避免内容被固定导航栏遮挡 */
  padding-bottom: 45px;
}
/* 菜单展开时取消底部内边距，适配非固定导航 */
body.menu-open {
  padding-bottom: 0;
}

.navbar {
  overflow: hidden;
  background-color: #333;
  position: fixed;
  bottom: 0;
  width: 100%;
}

.navbar a {
  float: right;
  display: block;
  color: #f2f2f2;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;
}

.navbar a:hover {
  background-color: #ddd;
  color: black;
}

.navbar a.active {
  background-color: #04AA6D;
  color: white;
}

.navbar .icon {
  display: none;
}

/* 重写版权样式，大屏左对齐居中 */
#copyright {
  float: left;
  line-height: 45px;
  color: white;
  padding-left: 16px;
  font-size: 14px;
}

@media screen and (max-width: 600px) {
  .navbar a:not(:first-child) {
    display: none;
  }
  .navbar a.icon {
    float: right;
    display: block;
  }
  /* 小屏未展开时版权居中显示 */
  #copyright {
    float: none;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    padding: 0;
  }
}

@media screen and (max-width: 600px) {
  .navbar.responsive .icon {
    position: absolute;
    right: 0;
    bottom: 0;
  }
  .navbar.responsive a {
    float: none;
    display: block;
    text-align: left;
  }
  /* 菜单展开时的样式调整 */
  .navbar.responsive {
    position: static;
  }
  .navbar.responsive #copyright {
    position: static;
    transform: none;
    display: block;
    text-align: center;
    float: none;
    padding: 8px 0;
    border-top: 1px solid #444;
  }
}

JS

function myFunction() {
  var x = document.getElementById("myNavbar");
  var body = document.body;
  if (x.className === "navbar") {
    x.className += " responsive";
    body.classList.add("menu-open");
  } else {
    x.className = "navbar";
    body.classList.remove("menu-open");
  }
}

内容的提问来源于stack exchange，提问作者Costas