ReadFileSync reading JS file is different. Want To Read Read RAW

It seems as if it is reading a compiled version of the JS file.
Do I need to specify any FS options to get the text version.
Why does it sometimes do it? Can I put a directive in the file itself, like “use strict” etc…

(I tried copyFileSync to make another file in the backend or public folder with a not JS extension before doing the file read, but I got EACCESS. not good)

No hacking here, but U want to externally manage the JS files.

Thanks

Lawrence