Function normalizeCountryCode

script.js:99–103

(value)

}

function normalizeCountryCode(value) {
    if (typeof value !== 'string') return '';
    const code = value.trim().toUpperCase();
    return /^[A-Z]{2}$/.test(code) ? code : '';
}

function countryFlag(countryCode) {
    const code = normalizeCountryCode(countryCode);