Postal code helpers 
Lightweight helpers for working with international postal code data to extract, validate or locate postal codes based on GeoNames data.
Installation
npm i postal-code-helpers
import postalCodeHelpers from 'postal-code-helpers';
Usage
Extract postal code from string
postalCodeHelpers.extract('this is a postal code 10999', 'DE');
// ['10999']
postalCodeHelpers.extract('this .10247, is a r23412345341 postal code 10999', 'DE');
// ['10247', '10999']
postalCodeHelpers.extract('this is a post code 1099921342345 inside a 1024 string', 'DE');
// null
Validate postal code
Validates a postal codes against the country pattern. Attention: This validation does not check whether a postal code actually exists!
postalCodeHelpers.validate('10999', 'DE');
// true
postalCodeHelpers.validate('1234', 'DE');
// false
Locate countries for postal codes
postalCodeHelpers.locate('SE1 6DR');
// [ 'GB' ]
postalCodeHelpers.locate('this is not a postal code');
// null
Data source
Geonames
Supported countries
AD, AL, AM, AR, AS, AT, AU, AX, AZ, BA, BB, BD, BE, BG, BH, BL, BM, BN, BR, BY, CA, CH, CL, CN, CO, CS, CR, CU, CV, CX, CY, CZ, DE, DK, DO, DZ, EC, EE, EG, ES, ET, FI, FM, FO, FR, GB, GE, GF, GG, GL, GP, GR, GT, GU, GW, HN, HR, HT, HU, ID, IE, IL, IM, IN, IQ, IR, IS, IT, JE, JO, JP, KE, KG, KH, KP, KR, KW, KZ, LA, LB, LI, LK, LR, LS, LT, LU, LV, MA, MC, MD, ME, MF, MG, MH, MK, MM, MN, MP, MQ, MT, MV, MW, MX, MY, MZ, NC, NE, NF, NG, NI, NL, NO, NP, NZ, OM, PF, PG, PH, PK, PL, PM, PR, PT, PW, PY, RE, RO, RS, RU, SA, SD, SE, SG, SH, SI, SJ, SK, SM, SN, SO, SV, SZ, TC, TH, TJ, TM, TN, TR, TW, UA, US, UY, UZ, VA, VE, VI, VN, WF, YT, ZA, ZM
