# err-code
[![NPM version][npm-image]][npm-url] [![Downloads][downloads-image]][npm-url] [![Build Status][travis-image]][travis-url] [![Dependency status][david-dm-image]][david-dm-url] [![Dev Dependency status][david-dm-dev-image]][david-dm-dev-url]
[npm-url]:https://npmjs.org/package/err-code
[downloads-image]:http://img.shields.io/npm/dm/err-code.svg
[npm-image]:http://img.shields.io/npm/v/err-code.svg
[travis-url]:https://travis-ci.org/IndigoUnited/js-err-code
[travis-image]:http://img.shields.io/travis/IndigoUnited/js-err-code/master.svg
[david-dm-url]:https://david-dm.org/IndigoUnited/js-err-code
[david-dm-image]:https://img.shields.io/david/IndigoUnited/js-err-code.svg
[david-dm-dev-url]:https://david-dm.org/IndigoUnited/js-err-code#info=devDependencies
[david-dm-dev-image]:https://img.shields.io/david/dev/IndigoUnited/js-err-code.svg
Create new error instances with a code and additional properties.
## Installation
`$ npm install err-code` - `NPM`
`$ bower install err-code` - `bower`
The browser file is named index.umd.js which supports CommonJS, AMD and globals (errCode).
## Why
I find myself doing this repeatedly:
```js
var err = new Error('My message');
err.code = 'SOMECODE';
err.detail = 'Additional information about the error';
throw err;
```
## Usage
Simple usage.
```js
var errcode = require('err-code');
// fill error with message + code
throw errcode(new Error('My message'), 'ESOMECODE');
// fill error with message + code + props
throw errcode(new Error('My message'), 'ESOMECODE', { detail: 'Additional information about the error' });
// fill error with message + props
throw errcode(new Error('My message'), { detail: 'Additional information about the error' });
// You may also pass a string in the first argument and an error will be automatically created
// for you, though the stack trace will contain err-code in it.
// create error with message + code
throw errcode('My message', 'ESOMECODE');
// create error with message + code + props
throw errcode('My message', 'ESOMECODE', { detail: 'Additional information about the error' });
// create error with message + props
throw errcode('My message', { detail: 'Additional information about the error' });
```
## Tests
`$ npm test`
## License
Released under the [MIT License](http://www.opensource.org/licenses/mit-license.php).
