ajt-validator

A comprehensive, flexible validation library for JavaScript and TypeScript applications that provides robust data validation with minimal configuration.

Features

• Type-safe validation - Built with TypeScript for strong typing
• Modular architecture - Use only the validators you need
• Extensible framework - Create custom validators by extending base classes
• Rich validation results - Detailed error information and metadata
• Zero dependencies - Lightweight and efficient
• Framework agnostic - Works with any JS/TS project

Core Validators

• Personal Information

• DOBValidator - Date of birth validation with age calculations

• NameValidator - Name validation with customizable format rules

• EmailValidator - Email address validation

• PhoneValidator - Phone number validation with international format support

• Authentication

• PasswordValidator - Password strength and format validation

• UsernameValidator - Username format validation

• General Purpose

• StringValidator - Text validation with length and format options

• NumberValidator - Numeric validation with range checking

• DateValidator - Date format and range validation

Installation

npm install ajt-validator

Usage

import { PersonalValidator } from 'ajt-validator';

// Create a validator instance
const nameValidator = new PersonalValidator.NameValidator({
  minLength: 2,
  maxLength: 50,
  allowSpecialChars: true
});

// Validate input
const result = nameValidator.validate("O'Connor");
console.log(result.isValid); // true

Validation Results

All validators return consistent result objects with:

• isValid - Boolean indicating validation success
• value - The validated (and possibly transformed) value
• errors - Array of detailed error objects with code and message
• Additional metadata specific to each validator type

Extending the Library

Create custom validators by extending the base classes:

import { BaseValidator } from 'ajt-validator';

class CustomValidator extends BaseValidator {
  validate(value) {
    // Custom validation logic
  }
}

License

MIT