Data Validation Library

Overview

The Data Validation Library is a lightweight JavaScript package for validating data input in Node.js applications. It provides a simple and flexible way to validate various data types, including strings, numbers, dates, and custom data structures.

Installation

You can install the Data Validation Library via npm:

npm install data-validation-library

Usage

Basic Usage

const { validate } = require('data-validation-library');

// Define validation rules
const rules = {
    username: 'required|string',
    email: 'required|email',
    age: 'required|numeric|min:18',
};

// Data to validate
const data = {
    username: 'john_doe',
    email: 'john@example.com',
    age: 25,
};

// Validate data
const validationResult = validate(data, rules);

if (validationResult.passes()) {
    // Data is valid
} else {
    // Data is invalid
    const errors = validationResult.errors.all();
    console.log(errors);
}

Available Validation Rules

• required: Field is required.
• string: Field must be a string.
• numeric: Field must be a numeric value.
• email: Field must be a valid email address.
• min:value: Field must have a minimum value (works with strings, numbers, and arrays).
• max:value: Field must have a maximum value (works with strings, numbers, and arrays).
• date: Field must be a valid date string.
• Custom validation rules can be defined using a callback function.

For detailed usage and examples, please refer to the Documentation.

Contribution

Contributions are welcome! If you find any bugs or have suggestions for improvement, feel free to open an issue or submit a pull request.

License

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