validation.gtin
Check an EAN-8, UPC-A, EAN-13 or GTIN-14 barcode number against the GS1 mod-10 check digit.
validateGtin in TypeScriptTagged barcode
3 capabilities
logistics.sscc
Build an 18-digit SSCC pallet label number from extension digit, GS1 company prefix and serial, with its check digit.
buildSscc in TypeScript
validation.gs1-check-digit
Compute or check the GS1 mod-10 check digit of any GS1 key: GTIN, SSCC, GLN, GSRN, GDTI, GSIN and the rest.
A group of 2:
gs1CheckDigit, isGs1CheckDigitValid