isValidCardNumber

v0.0.5

Whether value is a complete, valid payment-card number: it passes the Luhn checksum (luhn from @robonen/encoding) AND its digit length matches the detected findCardBrand brand (or the 12–19 digit ISO/IEC 7812 range when the brand is unknown). For the bare checksum, use luhn directly.

Source

Example

isValidCardNumber('4111 1111 1111 1111'); // true
isValidCardNumber('4111 1111 1111');      // false (wrong length)

Signature

declare function isValidCardNumber(value: string, brands?: readonly CardBrand[]): boolean;

Parameters

Parameter	Type	Default	Description
`value`	`string`	—	The card number (separators allowed)
`brands`?	`readonly CardBrand[]`	—	The brand list

Returns

booleanWhether the number is structurally valid