Function normalizeMonth

static/js/payment.js:357–361

(value)

}

function normalizeMonth(value) {
    const digits = String(value || "").replace(/\D/g, "");
    if (!digits) return "";
    return digits.slice(0, 2).padStart(2, "0");
}

function normalizeYear(value) {
    const digits = String(value || "").replace(/\D/g, "");