![]() The cardholderName validation essentially tests for a valid string greater than 0 characters in length that does not look like a card number. Valid.cardholderName(value: string): object You can test the validator with 4242424242424242, or numbers from our fake credit card number generator. If a valid card type cannot be determined, the card field in the response will be null.Ī fake session where a user is entering a card number may look like: Input You can use this tool to verify one or more credit or debit card numbers with multiple validation methods, including Luhn checksum verification and card scheme verification via the card's IIN. You can install card-validator through npm. For example, if you detect a user is entering (or has entered) an American Express card number, you can update the maxlength attribute of your CVV input element from 3 to 4 and even update the corresponding label from 'CVV' to 'CID'. ![]() Additionally, by having access to the current card type, you can better manage the state of your credit card form as a whole. ![]() This is useful for scenarios in which you wish to render an accompanying payment method icon (Visa, MasterCard, etc.). Conversely, if a user enters “41x” that value can no longer pass strict validation and you can provide a response immediately.Ĭredit Card Validator will also provide a determined card type (using credit-card-type). In a credit card field, entering “411” is not necessarily valid for submission, but it is still potentially valid. It includes first class support for 'potential' validity so you can use it to present appropriate UI to your user as they type.Ī typical use case in a credit card form is to notify the user if the data they are entering is invalid. It is designed as a CommonJS module for use in Node.js, io.js, or the browser. Credit Card Validator provides validation utilities for credit card data inputs.
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