Home Web Front-end HTML Tutorial 如何使用纯CSS3创建一个简单的五角星图形_html/css_WEB-ITnose

如何使用纯CSS3创建一个简单的五角星图形_html/css_WEB-ITnose

Jun 24, 2016 am 11:26 AM

我们可以使用SVG、Canvas、CSS3或者背景图片来实现五角星图案及其悬停效果。

CSS3引入的伪元素和变换特性使得实现五角星图形非常简单,并且可以结合渐变实现更为漂亮的效果。
因此使用图片实现五角星已经毫无必要(图片占用额外的请求,且数据量大。除非要支持低版本的桌面IE浏览器)。

首先我们创建一个三角形,这通常是使用带大尺寸边线而零内容尺寸的元素来实现,代码示范:
.tri {    width: 0;    height: 0;    border-left: 15px solid transparent;    border-right: 15px solid transparent;    border-bottom: 30px solid red;}
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第二步,我们使用伪元素:after和:before来克隆2个同样大小的三角形。
.tri:after,.tri:before {    width: 0;    height: 0;    border-left: 15px solid transparent;    border-right: 15px solid transparent;    border-bottom: 30px solid red;}
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然后,我们在上述2个伪元素上分别应用不同的旋转变换:
.tri:before {    transform: rotate(70deg);}.tri:after {    transform: rotate(-70deg);}
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这样我们就实现了一个五角星图形(图标)。我们可以用类似的方法实现更多的几何形状。

你可以通过在线实例自己试试看:http://wow.techbrood.com/fiddle/10258

你还可以先思考下如何实现带边线和渐变效果的三角形,再参考下这个实现:http://wow.techbrood.com/fiddle/16978


by iefreer


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