I am really curious what this is because I have been with 4 organizations now and despite all doing things very differently, they insist that they are doing things according to "industry standard."
I have even had a few cases of two senior devs reviewing my PR at the same time and going back and forth to tell me to revert what the other dev had me put in, with both coming from prestigious companies.
Clean and consistent formatting, detailed comments, sensible modularization -- and it works well
// GOOD
let fullname = 'John Smith'
// BAD
let f = 'John Smith'