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运算规则
Home Web Front-end HTML Tutorial Css3 calc可使用简单的数学运算计算宽度_html/css_WEB-ITnose

Css3 calc可使用简单的数学运算计算宽度_html/css_WEB-ITnose

Jun 24, 2016 am 11:29 AM

Css3 calc可使用简单的数学运算计算宽度

 

calc是单词calculate的缩写,是Css3的一个新的长度单位函数,可以使用简单的数学运算.

Firefox要使用-moz-calc()私有属性,

Chrome要使用-webkit-calc()私有属性,

IE9原生支持标准的不带前缀的写法,

Opera暂还不支持.

运算规则

可以使用 “+” “-” “*” “/” 四则运算(”+”、”-”两个符号边上必须要有空格,而”*”、”/”符号则不是必须的),

可以使用百分比、px、em、rem等单位,

可以混合使用各种单位进行计算.

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.content {

     border:1px solid #000;

     /* ‘+’ ‘-’ 符号左右两边加空格 */

     width:calc(100% - 2px);

}

 

.content2 {

     /* ‘+’ ‘-’ 符号左右两边加空格 */

     width:calc(10em + 10px);

}

 

/*三栏等宽布局*/

.content3 {

     margin-left:20px;

     /* ‘+’ ‘-’ 符号左右两边加空格, ‘*’ ‘/’ 符号可不加 */

     width:calc(100%/3 - 20px);

}

/* n为从0开始的乘数,依次递增1,如:3*0,3*1,3*2等相乘结果后的子元素 */

.content3:nth-child(3n){

     margin-left:0;

}

calc是单词calculate的缩写,是Css3的一个新的长度单位函数,可以使用简单的数学运算.

Firefox要使用-moz-calc()私有属性,

Chrome要使用-webkit-calc()私有属性,

IE9原生支持标准的不带前缀的写法,

Opera暂还不支持.

运算规则

可以使用 “+” “-” “*” “/” 四则运算(”+”、”-”两个符号边上必须要有空格,而”*”、”/”符号则不是必须的),

可以使用百分比、px、em、rem等单位,

可以混合使用各种单位进行计算.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

.content {

     border:1px solid #000;

     /* ‘+’ ‘-’ 符号左右两边加空格 */

     width:calc(100% - 2px);

}

 

.content2 {

     /* ‘+’ ‘-’ 符号左右两边加空格 */

     width:calc(10em + 10px);

}

 

/*三栏等宽布局*/

.content3 {

     margin-left:20px;

     /* ‘+’ ‘-’ 符号左右两边加空格, ‘*’ ‘/’ 符号可不加 */

     width:calc(100%/3 - 20px);

}

/* n为从0开始的乘数,依次递增1,如:3*0,3*1,3*2等相乘结果后的子元素 */

.content3:nth-child(3n){

     margin-left:0;

}

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