isValidUKPostcode関数

Whether a postcode follows Royal Mail's grammar: one of the six shapes (M2 5BQ, M34 4AB, CR0 2YR, DN16 9AA, W1A 4ZZ, EC1A 1HQ) with the letters each place allows, or GIR 0AA. Letter case and the space do not matter. Whether the postcode is in use is a different question; parseUKPostcode and the validator also check its area and district.

import { isValidUKPostcode } from "@johnmorrisdotca/address-plus/gb";

function isValidUKPostcode(postcode: string): boolean

import { isValidUKPostcode } from "@johnmorrisdotca/address-plus/gb";

console.log(["EC1A 1BB", "sw1a1aa", "GIR 0AA", "Q1 1AA", "M5V 1A1"].map(isValidUKPostcode));
// → [true,true,true,false,false]

[ true, true, true, false, false ]