Home Web Front-end HTML Tutorial Detailed explanation of how to use css3 box-shadow_html/css_WEB-ITnose

Detailed explanation of how to use css3 box-shadow_html/css_WEB-ITnose

Jun 24, 2016 am 11:53 AM

Its usage is:

 代码如下 复制代码
box-shadow: x-offset y-offset blur spread color inset;
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上述六个参数含义依次是水平方向的偏移(正值向右偏移,负值向左偏移)、垂直方向的偏移(正值向下偏移,负值向上偏移)、模糊距离、阴影的尺寸(扩展尺寸)、阴影的颜色以及阴影类型(默认是外阴影,使用inset表示为内阴影)。除了第一和第二个参数是必须的,其他的都是可选参数。当使用参数“0 0px 10px #333”时,注意第三个参数为阴影的模糊距离。
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Since there are many parameters and they can be changed, let’s use some examples to deepen our understanding.

Let’s first take a look at what shadow is. Let’s use four divs with a width and height of 70px and use the following box-shadow to see the display effect:

代码如下 复制代码
#d1 { box-shadow:0 0 0px #333;}#d2 { box-shadow:70px 0 0px #333;}#d3 { box-shadow:0 70px 0px #333;}#d4 { box-shadow:70px 0px 0px #333;}
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观察上述图,可以理解阴影其实是被原始块对象遮盖,但是可以通过x-offset和y-offset来移动阴影(相对于原始快对象)。
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Now let’s take a look at the blur effect through three 70x70px divs. The box-shadow settings are as follows:

代码如下 复制代码
#d5 { box-shadow:0 0 10px 0px #333;}#d6 { box-shadow:70px 70px 20px 0px #333;}#d7 { box-shadow:70px 70px 40px 0px #333;}
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模糊就是对阴影由内到进行模糊处理,www.111cn.net/对比d6和d7,可以看到模糊参数值越大,模糊的面积也越大。
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Finally, let’s take a look at the blur distance parameter, box-shadow The settings are as follows:

代码如下 复制代码
#d8 { box-shadow:0px 0px 0px 10px #333;}#d9 { box-shadow:80px 80px 0px 10px #333;}#d10 { box-shadow:80px 80px 10px 10px #333;}
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Original text: http://www.111cn.net/cssdiv/css/50547.htm

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