filename-reserved-regex 
Regular expression for matching reserved filename characters
On Unix-like systems / is reserved and <>:"/\|?* as well as non-printable characters \u0000-\u001F on Windows.
Install
$ npm install filename-reserved-regex
Usage
const filenameReservedRegex = require('filename-reserved-regex');
filenameReservedRegex().test('foo/bar');
//=> true
filenameReservedRegex().test('foo-bar');
//=> false
'foo/bar'.replace(filenameReservedRegex(), '!');
//=> 'foo!bar'
filenameReservedRegex.windowsNames().test('aux');
//=> true
API
filenameReservedRegex()
Returns a regex that matches all invalid characters.
filenameReservedRegex.windowsNames()
Returns an exact-match case-insensitive regex that matches invalid Windows filenames. These include CON, PRN, AUX, NUL, COM1, COM2, COM3, COM4, COM5, COM6, COM7, COM8, COM9, LPT1, LPT2, LPT3, LPT4, LPT5, LPT6, LPT7, LPT8 and LPT9.