CSS实现菜单按钮动画的代码示例

 //vue 中通过点击事件改变class
 <div 
 class="burger" 
 style="float: right;"
 :class="{'transform':rightTopBtn}"
 @click.stop="rightTopBtn=!rightTopBtn"
 >
 <div></div>
 <div></div>
 <div></div>
 </div>

 <!--按钮容器 START-->
 .burger {
 cursor: pointer;
 display: inline-block;
 margin: 7px 6px 0 0;
 outline: none;
 }
 <!--按钮容器 END-->
 
 <!--三条横线 通过rotate3d实现旋转 START-->
 .burger p {
 width: 30px;
 height: 4px;
 margin-bottom: 6px;
 background-color: rgb(51, 51, 51);
 transform: rotate3d(0, 0, 0, 0);
 }
 <!--三条横线 END-->
 
 .burger.transform p {
 background-color: transparent;
 }

 .burger.transform p:first-of-type {
 top: 10px;
 transform: rotate3d(0, 0, 1, 45deg)
 }

 .burger.transform p:last-of-type {
 bottom: 10px;
 transform: rotate3d(0, 0, 1, -45deg)
 }

 <!--点击后第一个和第三个横线的效果 START-->
 .burger.transform p:first-of-type, .burger.transform p:last-of-type {
 transition: transform .4s .3s ease, background-color 250ms ease-in;
 background: #00c1de;
 }
 <!--点击后第一个和第三个横线的效果 END-->
 
 <!--取消点击后恢复动画 START-->
 .burger p:first-of-type, .burger p:last-of-type {
 transition: transform .3s ease .0s, background-color 0ms ease-out;
 position: relative;
 }
 <!--取消点击后恢复动画 END-->