npm package: @stdlib/assert-is-null-array
Description: Test if a value is an array-like object containing only null values.
Author: The Stdlib Authors
Latest version: 0.2.3

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# isNullArray

[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url] <!-- [![dependencies][dependencies-image]][dependencies-url] -->

> Test if a value is an array-like object containing only null values.

<section class="installation">

## Installation

```bash
npm install @stdlib/assert-is-null-array
```

</section>

<section class="usage">

## Usage

```javascript
var isNullArray = require( '@stdlib/assert-is-null-array' );
```

#### isNullArray( value )

Tests if a `value` is an array-like object containing only `null` values.

```javascript
var bool = isNullArray( [ null, null, null ] );
// returns true

bool = isNullArray( [ null, NaN, null ] );
// returns false
```

</section>

<!-- /.usage -->

<section class="examples">

## Examples

<!-- eslint no-undef: "error" -->

```javascript
var isNullArray = require( '@stdlib/assert-is-null-array' );

var bool = isNullArray( [ null ] );
// returns true

bool = isNullArray( [ null, null, null ] );
// returns true

bool = isNullArray( null );
// returns false

bool = isNullArray( 'beep' );
// returns false

bool = isNullArray( [ null, 'boop' ] );
// returns false

bool = isNullArray( [] );
// returns false
```

</section>

<!-- /.examples -->

<!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->

<section class="related">

* * *

## See Also

-   <span class="package-name">[`@stdlib/assert-is-array`][@stdlib/assert/is-array]</span><span class="delimiter">: </span><span class="description">test if a value is an array.</span>
-   <span class="package-name">[`@stdlib/assert-is-null`][@stdlib/assert/is-null]</span><span class="delimiter">: </span><span class="description">test if a value is null.</span>

</section>

<!-- /.related -->

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<section class="main-repo" >

* * *

## Notice

This package is part of [stdlib][stdlib], a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

For more information on the project, filing bug reports and feature requests, and guidance on how to develop [stdlib][stdlib], see the main project [repository][stdlib].

#### Community

[![Chat][chat-image]][chat-url]

---

## License

See [LICENSE][stdlib-license].


## Copyright

Copyright &copy; 2016-2026. The Stdlib [Authors][stdlib-authors].

</section>

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[umd]: https://github.com/umdjs/umd
[es-module]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Modules

[deno-url]: https://github.com/stdlib-js/assert-is-null-array/tree/deno
[deno-readme]: https://github.com/stdlib-js/assert-is-null-array/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/assert-is-null-array/tree/umd
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[esm-url]: https://github.com/stdlib-js/assert-is-null-array/tree/esm
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[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/assert-is-null-array/main/LICENSE

<!-- <related-links> -->

[@stdlib/assert/is-array]: https://www.npmjs.com/package/@stdlib/assert-is-array

[@stdlib/assert/is-null]: https://www.npmjs.com/package/@stdlib/assert-is-null

<!-- </related-links> -->

</section>

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