isKnownFrenchPostcode関数

Whether La Poste's base officielle des codes postaux lists a postcode: France, the overseas departments and collectivities and Monaco. The base is La Poste's (Licence Ouverte 2.0); a postcode created since it was copied is not in it, so an unknown one is a warning for a validator to give, not proof that it does not exist.

import { isKnownFrenchPostcode } from "@johnmorrisdotca/address-plus/fr";

function isKnownFrenchPostcode(postcode: string): boolean

import { isKnownFrenchPostcode } from "@johnmorrisdotca/address-plus/fr";

console.log(["75008", "75099", "98000", "00000"].map(isKnownFrenchPostcode));
// → [true,false,true,false]

[ true, false, true, false ]