exporting callback results notes

Exporting a callback result:

Try arrow functions? Try Function Expressions?

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Arrow_functions

(function expression)
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Function

https://rainsoft.io/when-not-to-use-arrow-functions-in-javascript/

or what about this?

http://eslint.org/docs/developer-guide/working-with-rules