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extendable-error

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extendable-error

A simple extendable error class that extends Error.

  • 0.1.7
  • latest
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  • npm
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decreased by-19.06%
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What is extendable-error?

The extendable-error npm package provides a simple way to create custom error classes in JavaScript by extending the built-in Error class. This is useful for creating more specific error types in your applications, which can help with error handling and debugging.

What are extendable-error's main functionalities?

Creating a Custom Error Class

This feature allows you to create a custom error class by extending the ExtendableError class. The custom error class can have its own name and additional properties or methods if needed.

class MyCustomError extends ExtendableError {
  constructor(message) {
    super(message);
    this.name = 'MyCustomError';
  }
}

try {
  throw new MyCustomError('Something went wrong!');
} catch (error) {
  console.error(error.name); // MyCustomError
  console.error(error.message); // Something went wrong!
  console.error(error.stack); // Stack trace
}

Handling Custom Errors

This feature demonstrates how to handle custom errors by checking the instance of the error. This allows for more specific error handling logic based on the type of error.

class DatabaseError extends ExtendableError {
  constructor(message) {
    super(message);
    this.name = 'DatabaseError';
  }
}

try {
  throw new DatabaseError('Database connection failed!');
} catch (error) {
  if (error instanceof DatabaseError) {
    console.error('A database error occurred:', error.message);
  } else {
    console.error('An unknown error occurred:', error.message);
  }
}

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Package last updated on 15 Jul 2020

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