50.给前面的一个hover菜单加了一个小动画

HTML

<div class="pop-con">
    hover
    <ul class="pop">
        <li><a href="#">公告</a></li>
        <li><a href="#">投诉</a></li>
        <li><a href="#">搜索</a></li>
        <li><a href="#">绑定微信</a></li>
        <li><a href="#">修改密码</a></li>
        <li><a href="#">查看二维码</a></li>
        <li><a href="#">退出登录</a></li>
       </ul>
</div>

css

<style type="text/css">
            a{
                text-decoration: none;
            }
            li{
                list-style: none;
            }
            .pop-con{
                position: relative;
                width: 50px;
                height: 20px;
                margin: 0 auto;
                border: 1px solid #eee;
                padding: 10px;
            }
            @keyframes elastic-grow{
                from{transform: scale(0);}
                70% {
                     transform: scale(1.05);
                     animation-timing-function:
                     cubic-bezier(.1,.25,1,.25); /* 反向的ease */
                 }
                 100% {
                     transform: scale(1);
                     animation-timing-function:
                     cubic-bezier(.1,.25,1,.25); /* 反向的ease */
                 }
            }
            .pop-con:not(:hover)>.pop{
                transform: scale(0);
                transition: .25s;
                transition: .2s;
                transition: .5s cubic-bezier(.25,.1,.3,1.5)
                animation-fill-mode: forwards;
            }
            .pop-con:hover>.pop{
                /*visibility: visible;*/
                animation: elastic-grow .5s;
                animation-fill-mode: forwards;
            }
            .pop{
                /*visibility: hidden;*/
                position: absolute;
                padding-left: 0;
                background: white;
                width: 110px;
                top: 0;
                left: -10px;
                margin-top: 44px;
                filter: drop-shadow(0px 3px 5px rgba(0,0,0,.32));
                border-radius: 4px;
                padding-top: 0.25rem;
                padding-bottom: 0.25rem;
                transform: scale(0);
                transform-origin: 1.4em -.4em;
                animation-fill-mode: forwards;
                /*transition: .2s;
                transition: .5s cubic-bezier(.25,.1,.3,1.5);
                */
            }
            .pop::before{
                content: '';
                height: 0;
                width: 0;
                border: 10px solid transparent;
                border-color: transparent transparent white transparent;/*这是个三角形*/
                position: absolute;
                top: -20px;
                left: 10px;
                
            }
            .pop li{
                color: #333;
                text-align: center;
                padding-left: 0.25rem;
                height: 30px;
                line-height: 30px;
                
            }
            .pop li>a{
                display: inline-block;
                height: 32px;
                line-height: 30px;
                font-size: 15px;
                width: 100%;
                color: #333;            
            }
            
        </style>