Properly wrap an error's message.

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.

• Handle invalid errors
• Update error.stack with the new error message
• Either append or prepend the new message
• Trim whitespaces

import wrapErrorMessage from 'wrap-error-message'

wrapErrorMessage(new Error('Message.'), 'Additional message.')
// Error: Message.
// Additional message.

wrapErrorMessage(new Error('Message.'), 'Additional message:')
// Error: Additional message: Message.

wrapErrorMessage(new Error('Message.'), 'Additional message:\n')
// Error: Additional message:
// Message.

wrapErrorMessage(new Error('Message.'), '')
// Error: Message.

const invalidError = 'Message.'
wrapErrorMessage(invalidError, 'Additional message.')
// Error: Message.
// Additional message.

wrapErrorMessage(new Error('  Message with spaces  '), '  Additional message  ')
// Error: Message with spaces
// Additional message

npm install wrap-error-message

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.

error Error | any
message string
Return value: Error

Appends message to error.message. If message ends with : or :\n, prepends it instead.

Returns error. If error is not an Error instance, it is converted to one.

• modern-errors: Handle errors in a simple, stable, consistent way
• error-custom-class: Create one error class
• 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
• 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

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.

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!