Credit Card

The creditCard rule validates that a value is a credit card number: 13–19 digits passing the Luhn checksum.

Configuration

validationSchema: {
  card: { creditCard: true },
}

With a custom message:

card: { creditCard: "Enter a valid card number" }

V builder

import { V } from "formify-js";

V.creditCard()
V.creditCard("Enter a valid card number")

Default message

Please enter a valid credit card number

Examples

Things to know

• Spaces and dashes are stripped before validation, so 4242 4242 4242 4242 and 4242-4242-4242-4242 both validate.
• The rule checks the checksum and digit count — it does not detect the brand (Visa, Mastercard, …). For formatting as the user types, pair it with the creditCard formatter (format: "creditCard").
• Empty values pass unless required: true is also set.