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fast-luhn

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A fast Luhn algorithm for validating credit cards

github.com/bendrucker/fast-luhn

bendrucker/fast-luhn

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# fast-luhn [![tests](https://github.com/bendrucker/fast-luhn/workflows/tests/badge.svg)](https://github.com/bendrucker/fast-luhn/actions?query=workflow%3Atests) > A fast [Luhn](http://en.wikipedia.org/wiki/Luhn_algorithm) algorithm for validating credit cards. Adapted from [ShirtlessKirk's popular gist](https://gist.github.com/ShirtlessKirk/2134376). ## Installing ```sh $ npm install fast-luhn ``` ## API #### `luhn(number)` -> `Boolean` Returns `true`/`false` depending on whether the Luhn checksum is valid ##### number *Required* Type: `string` A credit card number. ## License MIT © [Ben Drucker](http://bendrucker.me)