Helper functions to check if a given number is a valid cred card number or not
This library can be used to validate a credit card number. It implements the Luhn algorithm which checks for the checksum of the card. In general it works with credit card numbers of all types (Visa, Mastercard, Maestro, American Express, ...).
Behind the scenes it transforms the given number into a list of strings to create single digits. This implementation may change in future. API will stay as is.
The main use case is the validation of credit card numbers entered by users in an input field. To avoid dependencies to parser libraries there is no function with the signature of String -> Bool.
npm install && npm test
This forked version was temporary created because of no response in PR withh fix which was accepted, but not merged for longer time. So for everybody who needs use fixed version, this is solution.