Use of CSS counters and multiple columns

This time I will bring you the use of CSS counters and multi-columns. What are the precautions when using CSS counters and multi-columns? Here are practical cases, let’s take a look.

Define a counter through css, and the number generated by the counter can be used in other elements.
Attribute:
1. counter-reset
Function: Used to define the counter and set the initial value
If the initial value is not set, the default is 0, if set, it can be positive, negative, 0
Selector

{
   counter-reset:counter1 10;
    }

Selector

{
   counter-reset:counter1 10 counter2 20;
   }

Note: If any element of the entire page wants to use the counter If so, it is best to define it in the body. Remember to define the counter in a certain element (except body). If defined in this way, it will always be the initial value when used again.

   body{
   counter-reset:c1 10 c2 20;
   }

2. Counter-increment
Function: Set the increment each time the counter is used. The default value is 1
Attribute value: It can be positive (increment) or Negative (decreasing)
Note: which tag is used, declare the counter-increment attribute in that tag
Syntax:
counter-increment: counter name increment value;
div{
counter- increment:c1 10;
}
Function:
counter(counterName) Function
Function: Use the numerical text created by the counter.
counterName: Counter name
2. Multiple columns

Attributes:
1, column-count
The number of columns in which the element is separated 3
2, column- gap
The gap between columns px
3, column-rule
Column rule, column separator width, style, color
column-rule:1px solid red;
Browse Server compatibility issues:

Internet 10 和 Opera 支持多列Firefox : -moz-Chrome 和 Safari : -webkit-div{column-count:3;column-gap:50px;column-rule:2px solid red;
-o-column-count:3;/*Opera*/-o-column-gap:50px;-o-column-rule:2px solid red;
-moz-column-count:3; /*火狐中的多列设置*/-moz-column-gap:50px;-moz-column-rule:2px solid green;
-webkit-column-count:3;/*Chrome 与 Safari*/-webkit-column-gap:50px;-webkit-column-rule:2px solid red;}

Commonly used writing methods in Firefox

-moz-column-count:3;
-moz-column-gap:50px;

Write separately

-moz-column-rule-style:dashed/dotted(点状)/double(双线)/solid(实线);
-moz-column-rule-width:thin/medium/thick/length;
-moz-column-rule-color:orange;

Overall

-moz-column-rule:2px dashed red;

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the PHP Chinese website!

Related reading:

What should I do if the browser is not compatible with the code I wrote

2018 latest front-end interview questions 11

The above is the detailed content of Use of CSS counters and multiple columns. For more information, please follow other related articles on the PHP Chinese website!