Is there a way to write things out to a local file through the plugin?

I would like to read through figma file, extract the necessary information that I am looking for, and then write that out into a local file in the format of json / csv. 

I was looking into some external libs like fs for typescript. But I am running into issues trying to do that. 

Anyone can give some pointers on how I can write things out to a local file?