Gtin-12 | npm.io

Collection of check digit algorithms implemented in JavaScript

checkdigit check digit algorithm check character system luhn mod 10 verhoeff damm iso7064 iso/iec 7064 mod 11-2

4.0.1 • Published 1 year ago

Returns true or false, whether the value is a valid ITF-14 (GTIN-14) code.

gtin upc upc-a upc-e gtin-12 upc-12 valid validation ucc-12

1.0.0 • Published 8 years ago

Utilities to validate and work with GTIN and UPC product codes.

gtin gtin-12 gtin12 gtin-13 gtin13 gtin-14 gtin14 valid validation validator

1.0.0 • Published 2 years ago