纯CSS3一个炫酷动画

纯CSS3一个炫酷动画

预览地址：纯CSS3一个炫酷动画

通过下边的代码可以看到这个例子的html代码还是很简单的，中间类似图标的部分是通过给两个<div class="icon"></div>添加伪元素::before、::after来实现的。

围绕盒子爬的虫子通过给<div class="box"></div>添加伪元素::before、::after，设置两个伪元素为110%大小的盒子，然后通过css3的裁剪属性clip: rect(top, right, bottom,left)来实现围绕效果，最后添加动画即可。

HTML代码

<div class="box">    <div class="icon icon1"></div>    <div class="icon icon2"></div></div>

CSS代码

body{
    margin: 0;
    background-color: #333;
}
.box{
    width: 200px;
    height: 200px;
    box-sizing: border-box;
    border: 1px solid #cb6341;
    position: fixed;
    left: 50%;
    top: 50%;
    margin-top: -100px;
    margin-left: -100px;
}
.box:after, .box:before{
    content: "";
    width: 110%;
    height: 110%;
    box-sizing: border-box;
    border: 2px solid;
    position: absolute;
    top: -5%;
    left: -5%;
    animation: boxBorder 6s linear infinite;
}
.box:before{
    animation-delay: -3s;
}
.box .icon{
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100px;
    height: 100px;
    margin-top: -50px;
    margin-left: -50px;
    animation: iconBox 3s linear infinite;
}
.box .icon:after,.box .icon:before{
    content: "";
    width: 40%;
    height: 100%;
    box-sizing: border-box;
    border-radius: 50%;
    border: 2px solid #fff;
    position: absolute;
    top: 0;
    left: 30px;
    animation: iconBorder 3s linear infinite;
}
.box .icon:after{
    transform: rotate(60deg);
}
.box .icon:before{
    transform: rotate(-60deg);
}
.box .icon2:before{
    transform: rotate(0deg);
}
.box .icon2:after{
    height: 10px;
    width: 10px;
    background-color: #fff;
    transform: translate(12px,-6px);
    border: 3px solid #333;
    box-sizing: content-box;
    animation: iconYuan 3s linear infinite 0.6s;
}
/* 布局结束 */
/* 动画开始 */
@keyframes iconBox {
    0%{
        transform: rotate(0deg);
    }
    100%{
        transform: rotate(360deg);
    }
}
@keyframes iconBorder {
    0%{
        border-color: #fff;
    }
    30%{
        border-color: yellow;
    }
    60%{
        border-color: blue;
    }
    100%{
        border-color: red;
    }
}
@keyframes iconYuan {
    0%{
        background-color: #fff;
    }
    30%{
        background-color: yellow;
    }
    60%{
        background-color: blue;
    }
    100%{
        background-color: red;
    }
}
@keyframes boxBorder {
    0%{
        border-color: #fff;
        clip: rect(0, 220px, 2px ,0);
    }
    25%{
        border-color: yellow;
        clip: rect(0, 2px, 220px ,0);
    }
    50%{
        border-color: blue;
        clip: rect(218px, 220px, 220px ,0);
    }
    75%{
        border-color: green;
        clip: rect(0, 220px, 220px ,218px);
    }
    100%{
        border-color: aqua;
        clip: rect(0, 220px, 2px ,0);
    }
}