Best practices about using of external files (such as json or csv files) in pre/post scripts

I have a question regarding to Postman functionality, please let me know if there existing option or workaround to load arbitrary external file ? (json)
I need to load the json (jsonschema) file to be used inside pre/post script withinternal js code
Thank you

Yes there is (but I think it’s not all that pretty).
See Tip 5 in this blog entry or my answer on this StackOverflow question or more info in this one