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# create-error-class [](https://travis-ci.org/floatdrop/create-error-class)
> Create error class
## Install
```
$ npm install --save create-error-class
```
## Usage
```js
var createErrorClass = require('create-error-class');
var HTTPError = createErrorClass('HTTPError', function (props) {
this.message = 'Status code is ' + props.statusCode;
});
throw new HTTPError({statusCode: 404});
```
## API
### createErrorClass(className, [setup])
Return constructor of Errors with `className`.
#### className
*Required*
Type: `string`
Class name of Error Object. Should contain characters from `[0-9a-zA-Z_$]` range.
#### setup
Type: `function`
Setup function, that will be called after each Error object is created from constructor with context of Error object.
By default `setup` function sets `this.message` as first argument:
```js
var MyError = createErrorClass('MyError');
new MyError('Something gone wrong!').message; // => 'Something gone wrong!'
```
## License
MIT © [Vsevolod Strukchinsky](http://github.com/floatdrop)
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