Check-Card

A utility to check credit card types and validity using Luhn's algorithm.

Installation

This is a Node.js module available through the npm registry.

Before installing, download and install Node.js. Node.js 0.10 or higher is required.

If this is a brand new project, make sure to create a package.json first with the npm init command.

Installation is done using the npm install command:

npm install check-card

Features

• Validate credit card numbers using Luhn's algorithm
• Determine card type (AMEX, MASTERCARD, VISA)
• Check if a card is valid or invalid based on its type
  • AMEX: 15 digits
  • MASTERCARD: 16 digits
  • VISA: 16 digits

Usage/Examples

const checkCard = require('check-card');
console.log(checkCard("371449635398431")); // Output: AMEX
console.log(checkCard("5418878773156819")); // Output: MASTERCARD

Contributing

Contributions are welcome! If you find any issues or have suggestions for improvements, please create an issue or submit a pull request on GitHub.

Security Issues

If you discover a security vulnerability in check-card, please report it to the maintainers. Your report will be taken seriously and promptly addressed.

Running Tests

To run the test suite, first install the dependencies, then run npm test:

 npm install
 npm test

Authors

• The original author of check-card is Mudita joshi.

Documentation

GitHub Organization for Official Middleware & Modules

License

This project is licensed under the MIT License - see the LICENSE file for details.