'Why JScript has no content inside instagram like button click event

I'm trying to understand which code triggers the like button in instagram photos. I used the web inspector tool in firefox and it shows the following function but nothing inside it. Am I looking at a wrong code?

Vendor.js (folder)

function Cn() {
  }

There are other JS Codes in this file, but the web inspector points to this function as the like button click event.

What should I do to find out which code triggers it? I will then use that code to send a manual web request to instagram to like that photo.



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