计数器有两个关键属性
-
counter-reset计数器重置
设置初始值：counter-reset: num 1
默认的初始值为0
可以设置多个：counter-reset: num1 1 num2 2; -
counter-increment计数器规则，计数器递增的意思
设置计数：counter-increment: num 2;
默认的值为1
可以设置多个：counter-increment: num1 1 num2 2;
注：每次重新设置此属性的时候，counter都会变化 -
counter计算结果
使用：content: counter(num)
疑惑：如何能将两个不同的name计算
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
.tag {
counter-increment: num;
}
.main {
counter-reset: num;
}
.num::after{
content: counter(num);
}
</style>
</head>
<body>
<div class="main">
<div class="tag"></div>
<div class="tag"></div>
<div class="tag"></div>
</div>
<div class="num"></div>
</body>
</html><!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
.tag {
counter-increment: num1 2 num2 3;
}
.main {
counter-reset: num1 num2;
}
.num::after{
content: counter(num1) counter(num2);
}
</style>
</head>
<body>
<div class="main">
<div class="tag"></div>
<div class="tag"></div>
<div class="tag"></div>
</div>
<div class="num"></div>
</body>
</html>