# @turf/boolean-clockwise

# booleanClockwise

Takes a ring and return true or false whether or not the ring is clockwise or counter-clockwise.

**Parameters**

-   `line` **([Geometry](http://geojson.org/geojson-spec.html#geometry) \| [Feature](http://geojson.org/geojson-spec.html#feature-objects)<[LineString](http://geojson.org/geojson-spec.html#linestring)> | [Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)<[Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)<[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)>>)** to be evaluated

**Examples**

```javascript
var clockwiseRing = turf.lineString([[0,0],[1,1],[1,0],[0,0]]);
var counterClockwiseRing = turf.lineString([[0,0],[1,0],[1,1],[0,0]]);

turf.booleanClockwise(clockwiseRing)
//=true
turf.booleanClockwise(counterClockwiseRing)
//=false
```

Returns **[Boolean](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Boolean)** true/false

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---

This module is part of the [Turfjs project](http://turfjs.org/), an open source
module collection dedicated to geographic algorithms. It is maintained in the
[Turfjs/turf](https://github.com/Turfjs/turf) repository, where you can create
PRs and issues.

### Installation

Install this module individually:

```sh
$ npm install @turf/boolean-clockwise
```

Or install the Turf module that includes it as a function:

```sh
$ npm install @turf/turf
```