# @turf/boolean-within

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## booleanWithin

Tests whether geometry a is contained by geometry b.
The interiors of both geometries must intersect, and the interior and boundary of geometry a must not intersect the exterior of geometry b.
booleanWithin(a, b) is equivalent to booleanContains(b, a)

### Parameters

*   `feature1` **([Geometry][1] | [Feature][2]\<any>)** GeoJSON Feature or Geometry
*   `feature2` **([Geometry][1] | [Feature][2]\<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](https://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 single module individually:

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

Or install the all-encompassing @turf/turf module that includes all modules as functions:

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


### Diagrams

![esri-within](diagrams/esri-within.png)