postal code regular expressions

postalcodes.js

var codes = {
    "AD": "AD\\d{3}",
    "AM": "(37)?\\d{4}",
    "AR": "([A-HJ-NP-Z])?\\d{4}([A-Z]{3})?",
    "AS": "96799",
    "AT": "\\d{4}",
    "AU": "\\d{4}",
    "AX": "22\\d{3}",
    "AZ": "\\d{4}",
    "BA": "\\d{5}",
    "BB": "(BB\\d{5})?",
    "BD": "\\d{4}",
    "BE": "\\d{4}",
    "BG": "\\d{4}",
    "BH": "((1[0-2]|[2-9])\\d{2})?",
    "BM": "[A-Z]{2}[ ]?[A-Z0-9]{2}",
    "BN": "[A-Z]{2}[ ]?\\d{4}",
    "BR": "\\d{5}[\\-]?\\d{3}",
    "BY": "\\d{6}",
    "CA": "[ABCEGHJKLMNPRSTVXY]\\d[ABCEGHJ-NPRSTV-Z][ ]?\\d[ABCEGHJ-NPRSTV-Z]\\d",
    "CC": "6799",
    "CH": "\\d{4}",
    "CK": "\\d{4}",
    "CL": "\\d{7}",
    "CN": "\\d{6}",
    "CR": "\\d{4,5}|\\d{3}-\\d{4}",
    "CS": "\\d{5}",
    "CV": "\\d{4}",
    "CX": "6798",
    "CY": "\\d{4}",
    "CZ": "\\d{3}[ ]?\\d{2}",
    "DE": "\\d{5}",
    "DK": "\\d{4}",
    "DO": "\\d{5}",
    "DZ": "\\d{5}",
    "EC": "([A-Z]\\d{4}[A-Z]|(?:[A-Z]{2})?\\d{6})?",
    "EE": "\\d{5}",
    "EG": "\\d{5}",
    "ES": "\\d{5}",
    "ET": "\\d{4}",
    "FI": "\\d{5}",
    "FK": "FIQQ 1ZZ",
    "FM": "(9694[1-4])([ \\-]\\d{4})?",
    "FO": "\\d{3}",
    "FR": "\\d{2}[ ]?\\d{3}",
    "GB": "GIR[ ]?0AA|((AB|AL|B|BA|BB|BD|BH|BL|BN|BR|BS|BT|CA|CB|CF|CH|CM|CO|CR|CT|CV|CW|DA|DD|DE|DG|DH|DL|DN|DT|DY|E|EC|EH|EN|EX|FK|FY|G|GL|GY|GU|HA|HD|HG|HP|HR|HS|HU|HX|IG|IM|IP|IV|JE|KA|KT|KW|KY|L|LA|LD|LE|LL|LN|LS|LU|M|ME|MK|ML|N|NE|NG|NN|NP|NR|NW|OL|OX|PA|PE|PH|PL|PO|PR|RG|RH|RM|S|SA|SE|SG|SK|SL|SM|SN|SO|SP|SR|SS|ST|SW|SY|TA|TD|TF|TN|TQ|TR|TS|TW|UB|W|WA|WC|WD|WF|WN|WR|WS|WV|YO|ZE)(\\d[\\dA-Z]?[ ]?\\d[ABD-HJLN-UW-Z]{2}))|BFPO[ ]?\\d{1,4}",
    "GE": "\\d{4}",
    "GF": "9[78]3\\d{2}",
    "GG": "GY\\d[\\dA-Z]?[ ]?\\d[ABD-HJLN-UW-Z]{2}",
    "GL": "39\\d{2}",
    "GN": "\\d{3}",
    "GP": "9[78][01]\\d{2}",
    "GR": "\\d{3}[ ]?\\d{2}",
    "GS": "SIQQ 1ZZ",
    "GT": "\\d{5}",
    "GU": "969[123]\\d([ \\-]\\d{4})?",
    "GW": "\\d{4}",
    "HM": "\\d{4}",
    "HN": "(?:\\d{5})?",
    "HR": "\\d{5}",
    "HT": "\\d{4}",
    "HU": "\\d{4}",
    "ID": "\\d{5}",
    "IL": "\\d{5}",
    "IM": "IM\\d[\\dA-Z]?[ ]?\\d[ABD-HJLN-UW-Z]{2}",
    "IN": "\\d{6}",
    "IO": "BBND 1ZZ",
    "IQ": "\\d{5}",
    "IS": "\\d{3}",
    "IT": "\\d{5}",
    "JE": "JE\\d[\\dA-Z]?[ ]?\\d[ABD-HJLN-UW-Z]{2}",
    "JO": "\\d{5}",
    "JP": "\\d{3}-\\d{4}",
    "KE": "\\d{5}",
    "KG": "\\d{6}",
    "KH": "\\d{5}",
    "KR": "\\d{3}[\\-]\\d{3}",
    "KW": "\\d{5}",
    "KZ": "\\d{6}",
    "LA": "\\d{5}",
    "LB": "(\\d{4}([ ]?\\d{4})?)?",
    "LI": "(948[5-9])|(949[0-7])",
    "LK": "\\d{5}",
    "LR": "\\d{4}",
    "LS": "\\d{3}",
    "LT": "\\d{5}",
    "LU": "\\d{4}",
    "LV": "\\d{4}",
    "MA": "\\d{5}",
    "MC": "980\\d{2}",
    "MD": "\\d{4}",
    "ME": "8\\d{4}",
    "MG": "\\d{3}",
    "MH": "969[67]\\d([ \\-]\\d{4})?",
    "MK": "\\d{4}",
    "MN": "\\d{6}",
    "MP": "9695[012]([ \\-]\\d{4})?",
    "MQ": "9[78]2\\d{2}",
    "MT": "[A-Z]{3}[ ]?\\d{2,4}",
    "MU": "(\\d{3}[A-Z]{2}\\d{3})?",
    "MV": "\\d{5}",
    "MX": "\\d{5}",
    "MY": "\\d{5}",
    "NC": "988\\d{2}",
    "NE": "\\d{4}",
    "NF": "2899",
    "NG": "(\\d{6})?",
    "NI": "((\\d{4}-)?\\d{3}-\\d{3}(-\\d{1})?)?",
    "NL": "\\d{4}[ ]?[A-Z]{2}",
    "NO": "\\d{4}",
    "NP": "\\d{5}",
    "NZ": "\\d{4}",
    "OM": "(PC )?\\d{3}",
    "PF": "987\\d{2}",
    "PG": "\\d{3}",
    "PH": "\\d{4}",
    "PK": "\\d{5}",
    "PL": "\\d{2}-\\d{3}",
    "PM": "9[78]5\\d{2}",
    "PN": "PCRN 1ZZ",
    "PR": "00[679]\\d{2}([ \\-]\\d{4})?",
    "PT": "\\d{4}([\\-]\\d{3})?",
    "PW": "96940",
    "PY": "\\d{4}",
    "RE": "9[78]4\\d{2}",
    "RO": "\\d{6}",
    "RS": "\\d{6}",
    "RU": "\\d{6}",
    "SA": "\\d{5}",
    "SE": "\\d{3}[ ]?\\d{2}",
    "SG": "\\d{6}",
    "SH": "(ASCN|STHL) 1ZZ",
    "SI": "\\d{4}",
    "SJ": "\\d{4}",
    "SK": "\\d{3}[ ]?\\d{2}",
    "SM": "4789\\d",
    "SN": "\\d{5}",
    "SO": "\\d{5}",
    "SZ": "[HLMS]\\d{3}",
    "TC": "TKCA 1ZZ",
    "TH": "\\d{5}",
    "TJ": "\\d{6}",
    "TM": "\\d{6}",
    "TN": "\\d{4}",
    "TR": "\\d{5}",
    "TW": "\\d{3}(\\d{2})?",
    "UA": "\\d{5}",
    "US": "\\d{5}([ \\-]\\d{4})?",
    "UY": "\\d{5}",
    "UZ": "\\d{6}",
    "VA": "00120",
    "VE": "\\d{4}",
    "VI": "008(([0-4]\\d)|(5[01]))([ \\-]\\d{4})?",
    "WF": "986\\d{2}",
    "XK": "\\d{5}",
    "YT": "976\\d{2}",
    "YU": "\\d{5}",
    "ZA": "\\d{4}",
    "ZM": "\\d{5}"
};

function isValidPostalCode(country, postalCode) {
  if !codes[country] {
    throw new Error("wat");   
  }
  var rgx = new RegEx(codes[country]);
  return rgx.test(postalCode + "");
}

console.log(isValidPostalCode("US", 98118));
console.log(isValidPostalCode("US", "98118");
console.log(isValidPostalCode("US", "98118-1234");