For example: How to determine which language the website uses to develop the backend?
You can check the support of the website server and you can roughly guess what language it is.
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
You can check the support of the website server and you can roughly guess what language it is.