cdigit (npm): Collection of check digit algorithms implemented in JavaScript
Keywords: checkdigit|check digit algorithm|check character system|luhn|mod 10|verhoeff|damm|iso7064|iso/iec 7064|mod 11-2|mod 37-2|mod 97-10|mod 97|mod 661-26|mod 1271-36|mod 11,10|mod 27,26|mod 37,36|gtin|gtin-8|gtin-12|gtin-13|gtin-14|gs1|upc|upc-a|ean|ean-8|ean-13|jan|isbn-13