n-exception

A TypeScript library providing a comprehensive set of exception classes for robust error handling in applications.

Overview

n-exception is a TypeScript library that extends the standard JavaScript Error class to provide a more structured and type-safe way of handling exceptions in your applications. It includes a base Exception class and several specialized exception types for common error scenarios.

Installation

npm install @nivinjoseph/n-exception
# or
yarn add @nivinjoseph/n-exception

Features

• Base Exception class extending JavaScript's Error
• Support for inner exceptions (error chaining)
• Type-safe exception handling
• Comprehensive stack trace support
• Common exception types for various scenarios

Available Exception Types

• Exception - Base exception class
• ApplicationException - For application-level errors
• ArgumentException - For invalid argument errors
• ArgumentNullException - For null argument errors
• InvalidArgumentException - For invalid argument values
• InvalidOperationException - For invalid operation attempts
• NotImplementedException - For unimplemented functionality
• ObjectDisposedException - For attempts to use disposed objects

Usage

Basic Usage

import { Exception, ArgumentNullException } from "@nivinjoseph/n-exception";

// Creating a basic exception
const ex = new Exception("Something went wrong");

// Creating an exception with an inner exception
const innerEx = new Error("Original error");
const exWithInner = new Exception("Operation failed", innerEx);

// Using specialized exceptions
function processUser(user: any) {
    if (!user) {
        throw new ArgumentNullException("user");
    }
    // ... rest of the function
}

Error Chaining

try {
    // Some operation that might fail
} catch (error) {
    throw new ApplicationException("Failed to process data", error);
}

Custom Exceptions

You can create your own exception types by extending the base Exception class:

class CustomException extends Exception {
    constructor(message: string, innerException?: Error) {
        super(message, innerException);
    }
}

API Reference

Exception Class

The base Exception class provides the following properties and methods:

• name: The name of the exception type
• message: The error message
• innerException: The inner exception (if any)
• stack: The stack trace

License

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