@ollah666/checkdigitcalculator (npm): Returns the check digit for all GS1 Keys requiring a Modulo 10 check digit, i.e. Global Trade Item Number (GTIN) in all applicable formats, i.e. GTIN-8, GTIN-12, GTIN-13, GTIN-14, Global Location Number (GLN), Serial Shipping Container Code (SSCC), Global
Keywords: GS1|check digit|checkdigit|gs1|gs1-standard