luhn

v0.0.1tested

Validate a number string against the Luhn (mod 10) checksum — the check digit used by payment cards, IMEIs, SIM ICCIDs, and more. Non-digits are ignored; an empty input is false.

Source Tests

Example

luhn('4111 1111 1111 1111'); // true
luhn('4111 1111 1111 1112'); // false

Signature

export function luhn(value: string): boolean{ ... }

Parameters

Parameter	Type	Default	Description
`value`	`string`	—	The number (separators allowed)

Returns

booleanWhether the Luhn checksum passes