Which language is helpful in interacting with web

Question

I want to build something that post automatically on my fb which language is needed where to start?

Answer 1

As already said, you will need to use the Facebook APIs for that. Keep in mind that the applications that interact with the profiles will receive changes regarding their use and privacy.

https://developers.facebook.com/docs/graph-api/overview

Answer 2

I think when you talk about web, the main language is JavaScript

Answer 3

To build something like that you'd most likely use the Facebook API.