isJCB
isJCB :: a β†’ Boolean
Reports whether the received value is a valid credit card number and is a JCB card
import isJCB from 'deep-waters/credit-cards/isJCB';
​
isJCB(3528701379615495); // JCB β†’ true
​
isJCB(347190259623701); // American Express β†’ false
isJCB(4286124395547263); // VISA β†’ false
isJCB(38716394960899); // Diners Club β†’ false
isJCB(6011583945260254); // Discover β†’ false
isJCB('6011-5839-4526-0254'); // Credit card format β†’ false
isJCB("foo"); // β†’ false
isJCB(undefined); // β†’ false
Please note, isJCB assumes the receiving value is a number or a string without the usual dashes. It only evaluates the credit card number, not its format.
Copy link