Er...
A small set of custom error classes for Node.js.
Installation
Just install with npm install er
or add it to your
package.json
.
Usage
Er... is really easy to use, it's just a set of error classes!
All of the classes are available by requiring the 'er' module,
and they all extend Error
so you can throw them :)
// JavaScriptvar FileNotFoundError = FileNotFoundError;throw 'File secret-stuff.txt was not found';
# CoffeeScript require 'er'throw 'File secret-stuff.txt was not found'
The er
namespace has the following properties, each of which
is an error class:
ArgumentError
Throw when an argument is set to an unexpected or incorrect
value.
ArgumentMissingError extends ArgumentError
Throw when a required argument is undefined
or null
.
ArgumentRangeError extends ArgumentError
Throw when an argument value is out of the expected range.
ArgumentTypeError extends ArgumentError
Throw when an argument type is invalid.
IOError
Throw when a filesystem operation fails.
DirectoryNotFoundError extends IOError
Throw when a requested directory is not found.
FileNotFoundError extends IOError
Throw when a requested file is not found.
ConstructionError
Throw when a constructor function is called without the new
keyword.
Development
In order to develop Er..., you'll need to install the following npm modules globally like so:
npm install -g coffee-script
npm install -g jake
And then install development dependencies locally with:
npm install
Once you have these dependencies, you will be able to run the following commands:
jake build
: Build JavaScript from the CoffeeScript source.
jake lint
: Run CoffeeLint on the CoffeeScript source.
jake test
: Run all unit tests.
License
Dual licensed under the MIT or GPL Version 2 licenses.