今天要为各网友再带来一款css实现的鼠标经过按钮的特效。按钮初始时，边框为断开的按钮，当鼠标经过按钮时动画变为封闭的边框。效果图如下：
我们一起看下实现的代码：
html代码：
<body> <a target="_blank" class="btn-edge" href="http://www.w2bc.com/shili">Hover Me</a> </body>
css代码：
*, *:before, *:after { margin: 0; padding: 0; -webkit-box-sizing: border-box; -moz-box-sizing: border-box; box-sizing: border-box; } body { padding-top: 10%; text-align: center; overflow-x: hidden; } .btn-edge { position: relative; display: inline-block; padding: 1rem 2rem; font-family: 'Titillium Web' , sans-serif; font-weight: 700; text-decoration: none; font-size: 3rem; color: #333; background-image: -webkit-gradient(linear, left top, left bottom, from(#333), to(#333)), -webkit-gradient(linear, left top, left bottom, from(#333), to(#333)), -webkit-gradient(linear, left top, left bottom, from(#333), to(#333)), -webkit-gradient(linear, left top, left bottom, from(#333), to(#333)), -webkit-gradient(linear, left top, left bottom, from(#333), to(#333)), -webkit-gradient(linear, left top, left bottom, from(#333), to(#333)), -webkit-gradient(linear, left top, left bottom, from(#333), to(#333)), -webkit-gradient(linear, left top, left bottom, from(#333), to(#333)); background-image: -webkit-linear-gradient(#333, #333), -webkit-linear-gradient(#333, #333), -webkit-linear-gradient(#333, #333), -webkit-linear-gradient(#333, #333), -webkit-linear-gradient(#333, #333), -webkit-linear-gradient(#333, #333), -webkit-linear-gradient(#333, #333), -webkit-linear-gradient(#333, #333); background-image: linear-gradient(#333, #333), linear-gradient(#333, #333), linear-gradient(#333, #333), linear-gradient(#333, #333), linear-gradient(#333, #333), linear-gradient(#333, #333), linear-gradient(#333, #333), linear-gradient(#333, #333); background-repeat: no-repeat; -webkit-background-size: 2rem 5px, 2rem 5px, 2rem 5px, 2rem 5px, 5px 2rem, 5px 2rem, 5px 2rem, 5px 2rem; background-size: 2rem 5px, 2rem 5px, 2rem 5px, 2rem 5px, 5px 2rem, 5px 2rem, 5px 2rem, 5px 2rem; background-position: 0 0, 100% 0, 0 100%, 100% 100%; -webkit-box-shadow: inset 0 0 0 5px rgba(255, 99, 71, 0); box-shadow: inset 0 0 0 5px rgba(255, 99, 71, 0); -webkit-transition: background-size 1s .4s, -webkit-box-shadow .4s, color .4s; transition: background-size 1s .4s, box-shadow .4s, color .4s; -webkit-transform: translateZ(0); transform: translateZ(0); } .btn-edge:hover { color: tomato; -webkit-background-size: 100% 5px, 100% 5px, 100% 5px, 100% 5px, 5px 100%, 5px 100%, 5px 100%, 5px 100%; background-size: 100% 5px, 100% 5px, 100% 5px, 100% 5px, 5px 100%, 5px 100%, 5px 100%, 5px 100%; -webkit-box-shadow: inset 0 0 0 5px tomato; box-shadow: inset 0 0 0 5px tomato; -webkit-transition: background-size 1s, -webkit-box-shadow .4s .6s, color .4s .6s; transition: background-size 1s, box-shadow .4s .6s, color .4s .6s; }
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