2-6 复杂的背景图案

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知识储备

1.2-5小节的linear-gradient()

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展示

lea.verou.me/css3patterns

1.png 2.png 3.png 4.png 5.png 6.png 7.png 8.png

测试

示例1
html

<ul>   
   <li></li> 
   <li></li> 
   <li></li> 
   <li></li> 
   <li></li>  
   <li></li> 
   <li></li>  
   <li></li>   
   <li></li>
</ul>

css

ul{    
list-style: none;
}
li{  
  display: inline-block;  
  margin:  20px;  
  list-style: none; 
   width: 300px; 
   height: 300px; 
   border-radius: 50%; 
   box-shadow: 0 0 0 15px rgba(255,255,255,.4) inset; 
   border: 3px dashed #333;
}

li:nth-child(1){  
  background: white; 
  background-image:
  linear-gradient(90deg,rgba(200,0,0,0.5) 50%,transparent 0),    
  linear-gradient(rgba(200,0,0,0.5) 50%,transparent 0);   
  background-size: 30px 30px;
}

思路：
1.先画一条竖线

linear-gradient(90deg,rgba(200,0,0,0.5) 50%,transparent 0)

2.再画一条横线

linear-gradient(rgba(200,0,0,0.5) 50%,transparent 0)

3.设置重复的格子大小

background-size: 30px 30px;

黑线围起来的格子

示例二

示例二

css

background: #58a;
background-image:
linear-gradient(90deg ,#fff 2px ,transparent 0),
linear-gradient(#fff 2px ,transparent 0),
linear-gradient(90deg,hsla(0,0%,100%,.3) 1px ,transparent 0),
linear-gradient(hsla(0,0%,100%,.3) 1px ,transparent 0);

background-size: 75px 75px,75px 75px,15px 15px ,15px 15px;

思路：
1.制造粗白线纹理

linear-gradient(90deg ,#fff 2px ,transparent 0),
linear-gradient(#fff 2px ,transparent 0)

background-size: 75px 75px,75px 75px

2.同理制造细条纹
Tips:将格子缩小

总结：第一次看到就觉得惊奇，CSS竟然能做出如此的复杂的图案。少年仍需努力啊！