To increment a counter value with CSS, use the counter-increment property.
You can try to run the following code to implement the counter-implement property −
Example
<!DOCTYPE html>
<html>
<head>
<style>
body {
counter-reset: section;
}
h2::before {
counter-increment: section;
content: "Fruit " counter(section) " - ";
}
</style>
</head>
<body>
<h1>Fruits</h1>
<h2>Mango</h2>
<h2>Kiwi</h2>
</body>
</html>