JavaScript error handling examples

This is a collection of various JavaScript error handling techniques.

• synchronous
  • synchronous-return-value: indicate error through return value
  • synchronous-exception: throw an exception if an error occurs
• asynchronous
  • error-callbacks: call additional error callback
  • error-callbacks-node: call regular callback with error argument
  • promises: return a promise object
  • domain-bound-execptions: use Node.js domains

Usage

Run a file without arguments to watch it fail; pass an argument for success.

$ ./promises.js
Letter not sent: Cannot reach address empty
$ ./promises.js London
Letter sent with code XYZ-London

Read more

This code accompanies the blog post Asynchronous error handling in JavaScript, which discusses the use case.