internal Router Board web server

Hello

which language hotspot’s service using for web based dynamic page(login/logout/status…)?
i saw codes like these ($(if chap-id) / $(if error)) in sources of web files. is this a specific server side language or a front-end framework like volt or etc.
i want build a script for self change password for hotspot’s users.i saw tutorials that use external web server for this work. i wanna know if RB supports internal web server, i use it instead.

Thanks

It’s a hotspot server specific pseudo-language. It’s not even technically a “language”, since you don’t have loops, though there are conditions (sort of).

You can see full details on the “Customizing Hotspot” manual page.