What exactly does the anonymous JavaScript function f => f do?

Question

I\'m using a third-party library that has a function that takes functions as arguments. I\'m doing some conditional checks to decide whether or not to add a particular funct

Answer 1

f => f is similar* to function(f){ return f; }

So close, but not quite what you expected.

_{* - as has been pointed out in comments, there are subtle differences, but for the sake of your question, I don't think they are particularly relevant. They are very relevant in other situations.}