Create custom error classes.

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Please reach out if you're looking for a Node.js API or CLI engineer (11 years of experience). Most recently I have been Netlify Build's and Netlify Plugins' technical lead for 2.5 years. I am available for full-time remote positions.

Features

Very simple API
Ponyfill error.cause on older Node.js and browsers
Properly set error.name
Fix issues when Error has been polyfilled

Example

import errorCustomClass from 'error-custom-class'

const UserError = errorCustomClass('UserError')
const DatabaseError = errorCustomClass('DatabaseError')

try {
  throw new UserError('message')
} catch (error) {
  console.log(error.name) // 'UserError'
  console.log(error instanceof UserError) // true
}

Install

npm install error-custom-class

This package works in both Node.js >=18.18.0 and browsers.

This is an ES module. It must be loaded using an import or import() statement, not require(). If TypeScript is used, it must be configured to output ES modules, not CommonJS.

API

The API is designed for simplicity. For more customization, error-class-utils should be used instead.

errorCustomClass(errorName)

errorName string
Return value: CustomError

Creates a custom error class.

Related projects

modern-errors: Handle errors in a simple, stable, consistent way
error-class-utils: Utilities to properly create error classes
error-serializer: Convert errors to/from plain objects
normalize-exception: Normalize exceptions/errors
is-error-instance: Check if a value is an Error instance
merge-error-cause: Merge an error with its cause
set-error-class: Properly update an error's class
set-error-message: Properly update an error's message
wrap-error-message: Properly wrap an error's message
set-error-props: Properly update an error's properties
set-error-stack: Properly update an error's stack
error-cause-polyfill: Polyfill error.cause
handle-cli-error: 💣 Error handler for CLI applications 💥
log-process-errors: Show some ❤ to Node.js process errors
error-http-response: Create HTTP error responses
winston-error-format: Log errors with Winston

Support

For any question, don't hesitate to submit an issue on GitHub.

Everyone is welcome regardless of personal background. We enforce a Code of conduct in order to promote a positive and inclusive environment.

Contributing

This project was made with ❤️. The simplest way to give back is by starring and sharing it online.

If the documentation is unclear or has a typo, please click on the page's Edit button (pencil icon) and suggest a correction.

If you would like to help us fix a bug or add a new feature, please check our guidelines. Pull requests are welcome!

ehmicky/error-custom-class