jquery - 悬停图标的 CSS/JQuery 列表从左到右展开

Question

我有一个列表，我将其包装在一个 div 中并使其正确 float :

我需要能够使 li 像下图一样从右向左展开:

因此对于列表 id，请执行以下操作:

<div id="menu-wrapper">
    <ul>
        <li><a href=""><img src="btn1.gif" alt="" /></a></li>
        <li><a href=""><img src="btn2.gif" alt="" /></a></li>
    </ul>
</div>

//CSS

#menu-wrapper {float:right;width:40px;}

如何让列表在鼠标悬停时像图片一样从右向左扩展？

Answer 1

使用max-width实现动画效果

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  background: url('http://placeimg.com/640/480/nature');
  background-size: cover;
}
#menu-wrapper {
  text-align: right;
}
.nav {
  list-style: none;
  display: inline-block;
  margin: 0 auto;
}
.cell {
  float: right;
  clear: both;
  background: lightgrey;
  margin: 5px 0;
  padding: 10px 15px;
}
.cell span {
  float: left;
  max-width: 0px;
  overflow: hidden;
  transition: 1s linear;
}
.cell:hover span {
  max-width: 100px;
}

<div id="menu-wrapper">
  <ul class="nav">
    <li class="cell">
      <img src="https://cdn3.iconfinder.com/data/icons/streamline-icon-set-free-pack/48/Streamline-18-32.png" /><span>expanded</span>
    </li>
    <li class="cell">
      <img src="https://cdn3.iconfinder.com/data/icons/streamline-icon-set-free-pack/48/Streamline-18-32.png" /><span>expanded</span>
    </li>
    <li class="cell">
      <img src="https://cdn3.iconfinder.com/data/icons/streamline-icon-set-free-pack/48/Streamline-18-32.png" /><span>expanded</span>
    </li>
  </ul>
</div>