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>