Package Exports

gtin

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Readme

gtin

GTIN (UPC, EAN, ITF, etc.) utilities.

npm install gtin

`gtin.upce.compress(barcode)`

Compress a UPC-A barcode to an 8-digit UPC-E barcode. Does not validate code by check digit. Barcode must be a string.

12-digit UPC-A: Number system and check digits are taken into account.
11-digit UPC-A: Number system 0 is assumed. Check digit is taken into account.
10-digit UPC-A: Number system 0 is assumed. Check digit is generated.

import {upce} from 'gtin'
upce.compress('1200000789')   // '01278907'
upce.compress('12000007897')  // '01278907'
upce.compress('012000007897') // '01278907'
upce.compress('012000007896') // '01278906'
upce.compress('012345678905') // null
upce.compress(123)            // Error thrown
upce.compress('123')          // Error thrown
upce.compress('abc')          // Error thrown

`gtin.upce.expand(barcode)`

Expands a UPC-E barcode to a 12-digit UPC-A barcode. Does not validate code by check digit. Barcode must be a string.

8-digit UPC-E: Number system and check digits are taken into account.
7-digit UPC-E: Number system 0 is assumed. Check digit is taken into account.
6-digit UPC-E: Number system 0 is assumed. Check digit is generated.

import {upce} from 'gtin'
upce.expand('127890')    // '012000007897'
upce.expand('1278907')   // '012000007897'
upce.expand('01278907')  // '012000007897'
upce.expand('01278906')  // '012000007896'
upce.expand('123412341') // Error thrown
upce.expand(123)         // Error thrown
upce.expand('123')       // Error thrown
upce.expand('abc')       // Error thrown