Easily create an error object with custom properties attached.
Err(message, properties)
var Err = require('custom-err'),
assert = require('assert');
// the first argument represents the error message
// the second argument represents the custom properties object
var myErr = Err('NotFound', { code: 404 });
assert.equal(myErr.message, 'NotFound');
assert.equal(myErr.code, 404);
Because I found myself often writing code like this:
var err = new Error('Not Found');
err.code = 404;
err.someProperty = true;
MIT