ISO-3166 Country code to flag emoji

flags.js

#!/usr/bin/env node

const [NODE_MAJOR_VERSION] = process.versions.node.split('.');
const assert = require('assert');
assert(NODE_MAJOR_VERSION >= 18, 'NodeJs 18 or greater is required');

function countryEmoji(code) {
  const offset = 0x1f1a5;
  return code
    .toUpperCase()
    .replace(/./g, char => String.fromCodePoint(char.charCodeAt(0) + offset));
}

async function main() {
  const url = 'https://datahub.io/core/country-list/r/data.json';
  const data = await fetch(url).then(resp => resp.json());

  data.forEach(({Code, Name}) => {
    console.log(`${Code}|\t${countryEmoji(Code)}\t| ${Name}`);
  });
}

main();

output

AF|	🇦🇫	| Afghanistan
AX|	🇦🇽	| Åland Islands
AL|	🇦🇱	| Albania
DZ|	🇩🇿	| Algeria
AS|	🇦🇸	| American Samoa
AD|	🇦🇩	| Andorra
AO|	🇦🇴	| Angola
AI|	🇦🇮	| Anguilla
AQ|	🇦🇶	| Antarctica
AG|	🇦🇬	| Antigua and Barbuda
AR|	🇦🇷	| Argentina
AM|	🇦🇲	| Armenia
AW|	🇦🇼	| Aruba
AU|	🇦🇺	| Australia
AT|	🇦🇹	| Austria
AZ|	🇦🇿	| Azerbaijan
BS|	🇧🇸	| Bahamas
BH|	🇧🇭	| Bahrain
BD|	🇧🇩	| Bangladesh
BB|	🇧🇧	| Barbados
BY|	🇧🇾	| Belarus
BE|	🇧🇪	| Belgium
BZ|	🇧🇿	| Belize
BJ|	🇧🇯	| Benin
BM|	🇧🇲	| Bermuda
BT|	🇧🇹	| Bhutan
BO|	🇧🇴	| Bolivia, Plurinational State of
BQ|	🇧🇶	| Bonaire, Sint Eustatius and Saba
BA|	🇧🇦	| Bosnia and Herzegovina
BW|	🇧🇼	| Botswana
BV|	🇧🇻	| Bouvet Island
BR|	🇧🇷	| Brazil
IO|	🇮🇴	| British Indian Ocean Territory
BN|	🇧🇳	| Brunei Darussalam
BG|	🇧🇬	| Bulgaria
BF|	🇧🇫	| Burkina Faso
BI|	🇧🇮	| Burundi
KH|	🇰🇭	| Cambodia
CM|	🇨🇲	| Cameroon
CA|	🇨🇦	| Canada
CV|	🇨🇻	| Cape Verde
KY|	🇰🇾	| Cayman Islands
CF|	🇨🇫	| Central African Republic
TD|	🇹🇩	| Chad
CL|	🇨🇱	| Chile
CN|	🇨🇳	| China
CX|	🇨🇽	| Christmas Island
CC|	🇨🇨	| Cocos (Keeling) Islands
CO|	🇨🇴	| Colombia
KM|	🇰🇲	| Comoros
CG|	🇨🇬	| Congo
CD|	🇨🇩	| Congo, the Democratic Republic of the
CK|	🇨🇰	| Cook Islands
CR|	🇨🇷	| Costa Rica
CI|	🇨🇮	| Côte d'Ivoire
HR|	🇭🇷	| Croatia
CU|	🇨🇺	| Cuba
CW|	🇨🇼	| Curaçao
CY|	🇨🇾	| Cyprus
CZ|	🇨🇿	| Czech Republic
DK|	🇩🇰	| Denmark
DJ|	🇩🇯	| Djibouti
DM|	🇩🇲	| Dominica
DO|	🇩🇴	| Dominican Republic
EC|	🇪🇨	| Ecuador
EG|	🇪🇬	| Egypt
SV|	🇸🇻	| El Salvador
GQ|	🇬🇶	| Equatorial Guinea
ER|	🇪🇷	| Eritrea
EE|	🇪🇪	| Estonia
ET|	🇪🇹	| Ethiopia
FK|	🇫🇰	| Falkland Islands (Malvinas)
FO|	🇫🇴	| Faroe Islands
FJ|	🇫🇯	| Fiji
FI|	🇫🇮	| Finland
FR|	🇫🇷	| France
GF|	🇬🇫	| French Guiana
PF|	🇵🇫	| French Polynesia
TF|	🇹🇫	| French Southern Territories
GA|	🇬🇦	| Gabon
GM|	🇬🇲	| Gambia
GE|	🇬🇪	| Georgia
DE|	🇩🇪	| Germany
GH|	🇬🇭	| Ghana
GI|	🇬🇮	| Gibraltar
GR|	🇬🇷	| Greece
GL|	🇬🇱	| Greenland
GD|	🇬🇩	| Grenada
GP|	🇬🇵	| Guadeloupe
GU|	🇬🇺	| Guam
GT|	🇬🇹	| Guatemala
GG|	🇬🇬	| Guernsey
GN|	🇬🇳	| Guinea
GW|	🇬🇼	| Guinea-Bissau
GY|	🇬🇾	| Guyana
HT|	🇭🇹	| Haiti
HM|	🇭🇲	| Heard Island and McDonald Islands
VA|	🇻🇦	| Holy See (Vatican City State)
HN|	🇭🇳	| Honduras
HK|	🇭🇰	| Hong Kong
HU|	🇭🇺	| Hungary
IS|	🇮🇸	| Iceland
IN|	🇮🇳	| India
ID|	🇮🇩	| Indonesia
IR|	🇮🇷	| Iran, Islamic Republic of
IQ|	🇮🇶	| Iraq
IE|	🇮🇪	| Ireland
IM|	🇮🇲	| Isle of Man
IL|	🇮🇱	| Israel
IT|	🇮🇹	| Italy
JM|	🇯🇲	| Jamaica
JP|	🇯🇵	| Japan
JE|	🇯🇪	| Jersey
JO|	🇯🇴	| Jordan
KZ|	🇰🇿	| Kazakhstan
KE|	🇰🇪	| Kenya
KI|	🇰🇮	| Kiribati
KP|	🇰🇵	| Korea, Democratic People's Republic of
KR|	🇰🇷	| Korea, Republic of
KW|	🇰🇼	| Kuwait
KG|	🇰🇬	| Kyrgyzstan
LA|	🇱🇦	| Lao People's Democratic Republic
LV|	🇱🇻	| Latvia
LB|	🇱🇧	| Lebanon
LS|	🇱🇸	| Lesotho
LR|	🇱🇷	| Liberia
LY|	🇱🇾	| Libya
LI|	🇱🇮	| Liechtenstein
LT|	🇱🇹	| Lithuania
LU|	🇱🇺	| Luxembourg
MO|	🇲🇴	| Macao
MK|	🇲🇰	| Macedonia, the Former Yugoslav Republic of
MG|	🇲🇬	| Madagascar
MW|	🇲🇼	| Malawi
MY|	🇲🇾	| Malaysia
MV|	🇲🇻	| Maldives
ML|	🇲🇱	| Mali
MT|	🇲🇹	| Malta
MH|	🇲🇭	| Marshall Islands
MQ|	🇲🇶	| Martinique
MR|	🇲🇷	| Mauritania
MU|	🇲🇺	| Mauritius
YT|	🇾🇹	| Mayotte
MX|	🇲🇽	| Mexico
FM|	🇫🇲	| Micronesia, Federated States of
MD|	🇲🇩	| Moldova, Republic of
MC|	🇲🇨	| Monaco
MN|	🇲🇳	| Mongolia
ME|	🇲🇪	| Montenegro
MS|	🇲🇸	| Montserrat
MA|	🇲🇦	| Morocco
MZ|	🇲🇿	| Mozambique
MM|	🇲🇲	| Myanmar
NA|	🇳🇦	| Namibia
NR|	🇳🇷	| Nauru
NP|	🇳🇵	| Nepal
NL|	🇳🇱	| Netherlands
NC|	🇳🇨	| New Caledonia
NZ|	🇳🇿	| New Zealand
NI|	🇳🇮	| Nicaragua
NE|	🇳🇪	| Niger
NG|	🇳🇬	| Nigeria
NU|	🇳🇺	| Niue
NF|	🇳🇫	| Norfolk Island
MP|	🇲🇵	| Northern Mariana Islands
NO|	🇳🇴	| Norway
OM|	🇴🇲	| Oman
PK|	🇵🇰	| Pakistan
PW|	🇵🇼	| Palau
PS|	🇵🇸	| Palestine, State of
PA|	🇵🇦	| Panama
PG|	🇵🇬	| Papua New Guinea
PY|	🇵🇾	| Paraguay
PE|	🇵🇪	| Peru
PH|	🇵🇭	| Philippines
PN|	🇵🇳	| Pitcairn
PL|	🇵🇱	| Poland
PT|	🇵🇹	| Portugal
PR|	🇵🇷	| Puerto Rico
QA|	🇶🇦	| Qatar
RE|	🇷🇪	| Réunion
RO|	🇷🇴	| Romania
RU|	🇷🇺	| Russian Federation
RW|	🇷🇼	| Rwanda
BL|	🇧🇱	| Saint Barthélemy
SH|	🇸🇭	| Saint Helena, Ascension and Tristan da Cunha
KN|	🇰🇳	| Saint Kitts and Nevis
LC|	🇱🇨	| Saint Lucia
MF|	🇲🇫	| Saint Martin (French part)
PM|	🇵🇲	| Saint Pierre and Miquelon
VC|	🇻🇨	| Saint Vincent and the Grenadines
WS|	🇼🇸	| Samoa
SM|	🇸🇲	| San Marino
ST|	🇸🇹	| Sao Tome and Principe
SA|	🇸🇦	| Saudi Arabia
SN|	🇸🇳	| Senegal
RS|	🇷🇸	| Serbia
SC|	🇸🇨	| Seychelles
SL|	🇸🇱	| Sierra Leone
SG|	🇸🇬	| Singapore
SX|	🇸🇽	| Sint Maarten (Dutch part)
SK|	🇸🇰	| Slovakia
SI|	🇸🇮	| Slovenia
SB|	🇸🇧	| Solomon Islands
SO|	🇸🇴	| Somalia
ZA|	🇿🇦	| South Africa
GS|	🇬🇸	| South Georgia and the South Sandwich Islands
SS|	🇸🇸	| South Sudan
ES|	🇪🇸	| Spain
LK|	🇱🇰	| Sri Lanka
SD|	🇸🇩	| Sudan
SR|	🇸🇷	| Suriname
SJ|	🇸🇯	| Svalbard and Jan Mayen
SZ|	🇸🇿	| Swaziland
SE|	🇸🇪	| Sweden
CH|	🇨🇭	| Switzerland
SY|	🇸🇾	| Syrian Arab Republic
TW|	🇹🇼	| Taiwan, Province of China
TJ|	🇹🇯	| Tajikistan
TZ|	🇹🇿	| Tanzania, United Republic of
TH|	🇹🇭	| Thailand
TL|	🇹🇱	| Timor-Leste
TG|	🇹🇬	| Togo
TK|	🇹🇰	| Tokelau
TO|	🇹🇴	| Tonga
TT|	🇹🇹	| Trinidad and Tobago
TN|	🇹🇳	| Tunisia
TR|	🇹🇷	| Turkey
TM|	🇹🇲	| Turkmenistan
TC|	🇹🇨	| Turks and Caicos Islands
TV|	🇹🇻	| Tuvalu
UG|	🇺🇬	| Uganda
UA|	🇺🇦	| Ukraine
AE|	🇦🇪	| United Arab Emirates
GB|	🇬🇧	| United Kingdom
US|	🇺🇸	| United States
UM|	🇺🇲	| United States Minor Outlying Islands
UY|	🇺🇾	| Uruguay
UZ|	🇺🇿	| Uzbekistan
VU|	🇻🇺	| Vanuatu
VE|	🇻🇪	| Venezuela, Bolivarian Republic of
VN|	🇻🇳	| Viet Nam
VG|	🇻🇬	| Virgin Islands, British
VI|	🇻🇮	| Virgin Islands, U.S.
WF|	🇼🇫	| Wallis and Futuna
EH|	🇪🇭	| Western Sahara
YE|	🇾🇪	| Yemen
ZM|	🇿🇲	| Zambia
ZW|	🇿🇼	| Zimbabwe