Firebase Update

express-server/node_modules/create-error-class/readme.md

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+# create-error-class [![Build Status](https://travis-ci.org/floatdrop/create-error-class.svg?branch=master)](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)