Credit Card Validation

A credit card validation package that is based on luhn algorithm with some small additions to cover the loopholes of this algorithm.

Supported credit card types

• Visa
• MasterCard
• AMEX
• Discover
• JCB
• Diners Club

Demo

https://cc-validate.firebaseapp.com/

Input

Pass the credit card number as a string var result = isValid('4111111111111111');

Output

An object

result = {
    cardNumber : "4111 1111 1111 1111",  // Formatted credit card string
    cardType : 'Visa',  // credit card Type
    isValid : true,  // Boolean True if card is valid, false if it is invalid
    message : ''  // Success/Failure message
}

A detailed explanation of how the underlying algorithm works can be found in this article : https://link.medium.com/FZZwZ0YyXX

A typical use case in a credit card form to notify the user if the credit card number is entered is invalid

Download

You can install card-validator through npm.

Installation

npm install cc-validate --save

Usage

Javascript

var validate = require('cc-validate');
var result = validate.isValid('4196221438170266');

result = {
    cardNumber : "4196 2214 3817 0266", // Formatted Credit Card String
    cardType : 'Visa',  // Credit Card Type
    isValid : true,  // Boolean True if card is valid, false if it is invalid
    message : 'Credit Card number entered valid'  // Success/Failure message
}

TypeScript

import { isValid } from 'cc-validate';
let result = isValid('4196221438170266');

result = {
    cardNumber : "4196 2214 3817 0266", // Formatted Credit Card String
    cardType : 'Visa',		        // Credit Card Type
    isValid : true,			// Boolean True if card is valid, false if it is invalid
    message : 'Credit Card number entered valid' // Success/Failure message
}

Test

npm run test

Major and Recent Changes

V 2.0.5 : Added live demo link

V 2.0.4 : Added validation for Diners Club

V 2.0.0 : Addition of credit card type validation and card number formatting

V 1.0.9 First Stable Version