ebec

A collection of extensible, type-safe error classes for TypeScript.

Every error gets a code (derived automatically from the class name if you don't set one), an optional cause for wrapping, optional errors for grouping multiple failures, and a toJSON() that serializes the full chain. No decorators, no reflection — just plain classes you can extend, catch, and serialize.

Table of Contents

• Packages
• Contributing
• License

Packages

@ebec/core

Base error class with automatic code derivation, message interpolation, error catalogs, and JSON serialization. Zero runtime dependencies.

npm install @ebec/core

import { BaseError } from '@ebec/core';

// Simple string message
throw new BaseError('something failed');
// ^ code: "BASE_ERROR" (derived from class name)

// Options with message interpolation
throw new BaseError({
    message: 'User {id} not found',
    messageData: { id: 42 },
    code: 'USER_NOT_FOUND',
});
// ^ message: "User 42 not found", code: "USER_NOT_FOUND"

// Extend for your domain — code is derived automatically
class PaymentError extends BaseError {}
throw new PaymentError('card declined');
// ^ code: "PAYMENT_ERROR"

// Group multiple errors
throw new BaseError({
    message: 'validation failed',
    errors: [new Error('field required'), new Error('invalid format')],
});

Full documentation

@ebec/http

43 pre-built HTTP error classes (4xx/5xx) extending @ebec/core with status codes, status messages, and duck-typed type guards.

npm install @ebec/http

import { NotFoundError, isClientError } from '@ebec/http';

const error = new NotFoundError('resource not found');
// ^ status: 404, code: "NOT_FOUND", message: "resource not found"

if (isClientError(error)) {
    res.status(error.status).json(error.toJSON());
}

Full documentation

Contributing

npm ci
npm run build
npm run test
npm run lint

License

Made with 💚

Published under MIT License.