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