Code style doesn't matter but tools like Eslint (or other linters) that can enforce some unimportant stuff, can also be very huuuuuge help for JavaScript programming. They can point most JS errors, for example.
I mean code style doesn't matter in JavaScript world. If I was developed in Python I would follow PEP8. But this just proves the point - code style doesn't matter to me much, so I could follow some other's codestyle, just to keep standards.