# @turf/boolean-within

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## booleanWithin

Boolean-within returns true if the first geometry is completely within the second geometry.
The interiors of both geometries must intersect and, the interior and boundary of the primary (geometry a)
must not intersect the exterior of the secondary (geometry b).
Boolean-within returns the exact opposite result of the `@turf/boolean-contains`.

**Parameters**

-   `feature1` **([Geometry][1] \| [Feature][2]&lt;any>)** GeoJSON Feature or Geometry
-   `feature2` **([Geometry][1] \| [Feature][2]&lt;any>)** GeoJSON Feature or Geometry

**Examples**

```javascript
var line = turf.lineString([[1, 1], [1, 2], [1, 3], [1, 4]]);
var point = turf.point([1, 2]);

turf.booleanWithin(point, line);
//=true
```

Returns **[boolean][3]** true/false

[1]: https://tools.ietf.org/html/rfc7946#section-3.1

[2]: https://tools.ietf.org/html/rfc7946#section-3.2

[3]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Boolean

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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-within
```

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

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