weideriCarros
/ validate_credit_card.js
Created
February 18, 2019 14:45
— forked from DiegoSalazar/validate_credit_card.js
Luhn algorithm in Javascript. Check valid credit card numbers
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| // takes the form field value and returns true on valid number | |
| function valid_credit_card(value) { | |
| // accept only digits, dashes or spaces | |
| if (/[^0-9-\s]+/.test(value)) return false; | |
| // The Luhn Algorithm. It's so pretty. | |
| var nCheck = 0, nDigit = 0, bEven = false; | |
| value = value.replace(/\D/g, ""); | |
| for (var n = value.length - 1; n >= 0; n--) { |