CSS - 悬停

CSS 光标悬停

CSS :hover伪类用于当用户将鼠标光标悬停在某个元素上时将其定位为目标元素。其目的是应用样式或触发特定Behave以增强用户体验或提供额外的视觉反馈。

CSS 光标悬停是一种使交互元素更加动态和引人入胜的工具，除了移动鼠标之外不需要任何用户输入。

适用于

HTML 元素，例如按钮、链接、图像等。

CSS 语法

:hover {
   /* ... */
}

CSS 悬停 - 链接颜色更改

以下是当鼠标光标移至链接时更改链接背景颜色的示例：

<html>
<head>
<style>
   a {
      background-color: #40a944;
      color: #fff;
      font-size: 1rem;
      padding: 10px;
   }
   a:hover {
      background-color: #cfe9d0;
      color: #000;
   }
</style>
</head>
<body>
   <div>
      <h2>Bring your cursor on the below link</h2>
      <a href="#">Hover over to see the color change!!!</a>
   </div>
</body>
</html>

CSS 悬停 - 背景颜色变化

以下是当鼠标光标移至按钮上时更改按钮背景颜色的示例：

<html>
<head>
<style>
   button {
      background-color: greenyellow;
      padding: 10px;
      font-size: large;
   }
   button:hover {
      background-color: gold;
   }
</style>
</head>
<body>
      <h2>Bring your cursor on the below button</h2>
      <button>Hover me!!!</button>
   </div>
</body>
</html>

CSS 悬停 - 更改光标形状

以下是当鼠标光标移至按钮上时更改光标形状的示例：

<html>
<head>
<style>
   button {
      background-color: greenyellow;
      padding: 10px;
      font-size: large;
   }
   button:hover {
      cursor:pointer;
   }
</style>
</head>
<body>
      <h2>Bring your cursor on the below button</h2>
      <button>Hover me!!!</button>
   </div>
</body>
</html>

CSS Hover - 更改边框形状

这是一个示例，其中链接的边框在悬停时发生变化：

<html>
<head>
<style>
   .link {
      color: #40a944;
      text-transform: uppercase;
      padding: 20px;
      border: 4px solid #40a944;
      border-radius: 10px;
      display: inline-block;
   }
   .link:hover {
      color: #494949;
      border-radius: 45px;
      border-color: #494949;
   }
</style>
</head>
<body>
   <h2>Hover effect on border of the link</h2>
   <div class="button"><a class="link" href="#">Check my borders on hover</a></div>
</body>
</html>

CSS Hover - 添加框阴影

这是一个示例，其中将框阴影添加到悬停时的链接中：

<html>
<head>
<style>
   a {
      font-size: 2rem;
      color: #071402;
      margin: 0 .25rem;
      padding: 0 .25rem;
      transition: color .3s ease-in-out, box-shadow .3s ease-in-out;
   }
   a:hover {
      box-shadow: inset 100px 0 0 100px #9ce2cc;
      color: rgb(240, 32, 32);
   }
</style>
</head>
<body>
   <div>
      <a href="#">Hover over me!!</a>
   </div>
</body>
</html>

CSS Hover - 成长背景

下面是一个示例，其中背景在悬停时在链接上变大：

<html>
<head>
<style>
   a {
      text-decoration-line: underline;
      color: #18272F;
      font-size: 2rem;
      position: relative;
   }
   a::before {
      content: '';
      background-color: rgba(118, 213, 83, 0.75);
      font-size: 2rem;
      position: absolute;
      left: 0;
      bottom: 3px;
      width: 100%;
      height: 10px;
      z-index: -1;
      transition: all .5s ease-in-out;
   }
   a:hover::before {
      bottom: 0;
      height: 100%;
   }
</style>
</head>
<body>
   <div>
      <a href="#">Hover over me!!</a>
   </div>
</body>
</html>

CSS 悬停 - Ranbow 颜色效果

这是一个示例，其中链接的下划线在悬停时呈现彩虹色效果：

<html>
<head>
<style>
   a {
      color: black;
      text-decoration: none;
      }
   a {
      background:
      linear-gradient(
      to right,
      rgb(179, 232, 168),
      rgb(185, 162, 215)
      ),
      linear-gradient(
      to right,
      rgba(255, 0, 0, 1),
      rgba(255, 0, 180, 1),
      rgba(0, 200, 50, 1)
      );
      background-size: 100% 5px, 0 5px;
      background-position: 100% 100%, 0 100%;
      background-repeat: no-repeat;
      transition: background-size 700ms;
   }
   a:hover {
      background-size: 0 5px, 100% 5px;
   }
   body {
      display: grid;
      font-family: Verdana, Geneva, Tahoma, sans-serif;
      font-size: 2rem;
      height: 100vh;
   }
</style>
</head>
<body>
   <div>
      <a href="#">Hover over me!!</a>
   </div>
</body>
</html>

CSS 悬停 - 阴影效果

这是一个示例，其中为悬停时的按钮提供阴影效果：

<html>
<head>
<style>
   body {
      width: 100%;
      height: 100vh;
      display: grid;
   }
   .glow {
      padding: 10px;
      width: 250px;
      height: 50px;
      border: none;
      outline: none;
      color: #fff;
      background: #111;
      cursor: pointer;
      position: relative;
      z-index: 0;
      border-radius: 20px;
   }
   .glow:before {
      content: '';
      background: linear-gradient(60deg, #ff0000, #ff7300, #fffb00, #48ff00, #00ffd5, #002bff, #7a00ff, #ff00c8, #ff0000);
      position: absolute;
      top: -4px;
      left:-4px;
      background-size: 400%;
      z-index: -1;
      filter: blur(15px);
      width: calc(100% + 6px);
      height: calc(100% + 6px);
      animation: glowing 20s linear infinite;
      opacity: 0;
      transition: opacity .3s ease-in-out;
      border-radius: 10px;
   }
   .glow:active {
      color: rgb(246, 235, 235)
   }
   .glow:active:after {
      background: transparent;
   }
   .glow:hover:before {
      opacity: 1;
   }
   .glow:after {
      z-index: -1;
      content: '';
      position: absolute;
      width: 100%;
      height: 100%;
      background: #111;
      left: 0;
      top: 0;
      border-radius: 10px;
   }
   @keyframes glowing {
      0% { background-position: 0 0; }
      50% { background-position: 400% 0; }
      100% { background-position: 0 0; }
   }
</style>
</head>
<body>
   <button class="glow" type="button">Hover & Click!</button>
</body>
</html>