Process each digit one by one starting from the lastįor (let i = val. Let checksum = 0 // running checksum total It's a bitwise operator, not a Boolean one (see MDN page) Celer圜up: this is just a Luhn algorithm (see Wikipedia).Apart from checking for zero length strings there is no range checking as that is outside the scope of the method and checking for credit card number validity is just one application of it. const validateCardNumber = number => $") es6-javascript luhn-algorithm creditcard-validator. Luhn algorithm in JavaScript: validate credit card number supplied as. JavaScript Functions to validate Credit-Card numbers with Lunh Algorithm.
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