CSS3 Hover 动画特效
根据 奇舞团：http://www.75team.com/archives/807 做的demo
根据视频中跟着做的 demo1:
<!DOCTYPE html>
<html >
<head>
<meta charset="UTF-8">
<title>Document</title>
<style type="text/css">
*{margin:0;padding:0;}
.box,.mask,.img,.border{ width: 200px; height: 200px;border-radius:50%; cursor:pointer;}
.box{position:relative; }
.mask,.border{position:absolute;left:0;top:0;}
.border{border:10px solid red;border-bottom-color:green;border-right-color: green;transition:all 0.5s ease-in; box-sizing:border-box;}
.mask{ background:rgba(0,0,0,0.2); opacity: 0;color:rgba(255,255,255,0);transition:all 0.5s ease-in;}
.info{ text-align:center; font-size: 24px; margin-top:50%; transform: translateY(-50%);}
.img{ background-size:cover; background-position: 50% 50%;}
.box:hover .border{ transform:rotateZ(90deg);}
.box:hover .mask{ opacity:1;color:rgba(255,255,255,1);}
</style>
</head>
<body>
<div class="box">
<div class="img" ></div>
<div class="mask">
<div class="info">小S</div>
</div>
<div class="border"></div>
</div>
</body>
</html>跟着 做 “举一反三” 例子： demo2:
发现一个小问题 .mask 的 transform 平移出没有透明度的其实鼠标还是能够hover上 触发box 的 hover,直接导致 hover 区域变大不准 ，最开始想直接 给 box 一个 overflow:hidden 后发现这个效果没用了，再想用伪类解决也没解决了，最后用js 在 #box mouseover时加个class 让他取消到hidden 同时 监听 .mask transition 结束时去掉 #box 上的class 始终保持#box 上hideen;
<!DOCTYPE html>
<html >
<head>
<meta charset="UTF-8">
<title>Document</title>
<style type="text/css">
*{margin:0;padding:0;}
#box,.mask,.img{ width: 200px; height: 200px;border-radius:50%; cursor:pointer;}
#box{position:relative; overflow:hidden; }
#box.active{ overflow:visible;}
.mask{position:absolute;left:0;top:0;}
.border{border:10px solid red;border-bottom-color:green;border-right-color: green;transition:all 0.5s ease-in; box-sizing:border-box;}
.mask{ transform:translateX(200px); background:rgba(0,0,0,0.2); opacity: 0;color:rgba(255,255,255,0);transition:all 0.3s ease-in;}
.info{ text-align:center; font-size: 24px; margin-top:50%; transform: translateY(-50%);}
.img{ background-size:cover; background-position: 50% 50%;transition:all 0.5s ease-in;}
.img:after{ display:block; width:200px; height:200px; content:'';border-radius:50%; box-shadow: inset 0 0 0 16px rgba(255, 255, 255, 0.6), 0 1px 2px rgba(0, 0, 0, 0.3);}
#box:hover {}
#box:hover .img{ transform:rotateZ(30deg);}
#box:hover .mask{ opacity:1;color:rgba(255,255,255,1);transform:translateX(0px);}
</style>
<script>
window.onload = function(){
var oBox = document.querySelector('#box'),
oMask = document.querySelector('.mask');
oBox.onmouseover = function(){
this.className = 'active';
}
oBox.onmouseout = function(){
this.className = 'active';
}
oMask.addEventListener("transitionend", myFunction);
function myFunction(){
oBox.className = ' ';
}
}
</script>
</head>
<body>
<div >
<div class="img" ></div>
<div class="mask">
<div class="info">文字</div>
</div>
</div>
</body>
</html>演示：demo2
待解决的问题： 想用伪类的选择器解决,但还是有点问题
<!DOCTYPE html>
<html >
<head>
<meta charset="UTF-8">
<title>Document</title>
<style type="text/css">
*{margin:0;padding:0;}
.box,.mask,.img,.test{ width: 200px; height: 200px;border-radius:50%; cursor:pointer;}
.box{position:relative; }
.mask,.test{position:absolute;left:0;top:0;}
.border{border:10px solid red;border-bottom-color:green;border-right-color: green;transition:all 0.5s ease-in; box-sizing:border-box;}
.mask{ transform:translateX(200px); background:rgba(0,0,0,0.2); opacity: 0;color:rgba(255,255,255,0);transition:all 0.3s ease-in;}
.info{ text-align:center; font-size: 24px; margin-top:50%; transform: translateY(-50%);}
.img{ background-size:cover; background-position: 50% 50%;transition:all 0.5s ease-in;}
.img:after{ display:block; width:200px; height:200px; content:'';border-radius:50%; box-shadow: inset 0 0 0 16px rgba(255, 255, 255, 0.6), 0 1px 2px rgba(0, 0, 0, 0.3);}
.test:hover { }
.test:hover .img{ transform:rotateZ(30deg);}
.test:hover + .mask{ opacity:1;color:rgba(255,255,255,1);transform:translateX(0px);}
</style>
</head>
<body>
<div class="box">
<div class="img" ></div>
<div class="test"></div>
<div class="mask">
<div class="info">文字</div>
</div>
</div>
</body>
</html>