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# decamelize [![Build Status](https://travis-ci.org/sindresorhus/decamelize.svg?branch=master)](https://travis-ci.org/sindresorhus/decamelize)

> Convert a camelized string into a lowercased one with a custom separator<br>
> Example: `unicornRainbow` → `unicorn_rainbow`

## Install

```
$ npm install decamelize
```

## Usage

```js
const decamelize = require('decamelize');

decamelize('unicornRainbow');
//=> 'unicorn_rainbow'

decamelize('unicornRainbow', '-');
//=> 'unicorn-rainbow'
```

## API

### decamelize(input, separator?)

#### input

Type: `string`

#### separator

Type: `string`\
Default: `'_'`

## Related

See [`camelcase`](https://github.com/sindresorhus/camelcase) for the inverse.

---

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