DistroHard/node_modules/validator/es/lib/isBIC.js

import assertString from './util/assertString';
import { CountryCodes } from './isISO31661Alpha2'; // https://en.wikipedia.org/wiki/ISO_9362

var isBICReg = /^[A-Za-z]{6}[A-Za-z0-9]{2}([A-Za-z0-9]{3})?$/;
export default function isBIC(str) {
  assertString(str); // toUpperCase() should be removed when a new major version goes out that changes
  // the regex to [A-Z] (per the spec).

  if (!CountryCodes.has(str.slice(4, 6).toUpperCase())) {
    return false;
  }

  return isBICReg.test(str);
}