How do i get information by opening files etc... In JavaScript?

Question

what must I import?

Answer 1

Do you mean: "How to retrieve locally stored information (or information within local files) via JavaScript?". Unfortunately, you can't, it's a security issue and most browsers don't allow it.
If that's not what you're trying to ask then please rephrase your answer or explain it in further detail.
- Thanks!

Answer 2

If somebody else is using the code, their IP address, WFC address, phone name Kernel number etc… will appear