is-country
Returns true if your input is a country. Supports country name, ISO 3166-1 alpha-2, alpha-3, and numeric country codes.
Usage
Run npm i is-country and then you can use this gloriously useful utility, as such:
const isCountry = require("is-country");
async function main()
{
console.log(await isCountry("DE")); // true
console.log(await isCountry("XX")); // false
}
main();