npm package: @stdlib/assert-is-type-error
Description: Test if a value is a TypeError object.
Author: The Stdlib Authors
Latest version: 0.2.3

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<details>
  <summary>
    About stdlib...
  </summary>
  <p>We believe in a future in which the web is a preferred environment for numerical computation. To help realize this future, we've built stdlib. stdlib is a standard library, with an emphasis on numerical and scientific computation, written in JavaScript (and C) for execution in browsers and in Node.js.</p>
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# isTypeError

[![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 a [TypeError][mdn-type-error] object.

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<section class="intro">

</section>

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<!-- Package usage documentation. -->

<section class="installation">

## Installation

```bash
npm install @stdlib/assert-is-type-error
```

</section>

<section class="usage">

## Usage

```javascript
var isTypeError = require( '@stdlib/assert-is-type-error' );
```

#### isTypeError( value )

Tests if a `value` is a [`TypeError`][mdn-type-error] object.

```javascript
var bool = isTypeError( new TypeError( 'beep' ) );
// returns true
```

</section>

<!-- /.usage -->

<!-- Package usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->

<section class="notes">

## Notes

-   This function should **not** be considered robust. While the function should **always** return `true` if provided a [`TypeError`][mdn-type-error] (or a descendant) object, false positives may occur due to the fact that the [`TypeError`][mdn-type-error] constructor inherits from [`Error`][mdn-error] and has no internal class of its own. Hence, [`TypeError`][mdn-type-error] impersonation is possible.

</section>

<!-- /.notes -->

<!-- Package usage examples. -->

<section class="examples">

## Examples

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

```javascript
var isTypeError = require( '@stdlib/assert-is-type-error' );

var bool = isTypeError( new TypeError( 'type error' ) );
// returns true

bool = isTypeError( new Error( 'error' ) );
// returns false

bool = isTypeError( new EvalError( 'eval error' ) );
// returns false

bool = isTypeError( new ReferenceError( 'reference error' ) );
// returns false

bool = isTypeError( new SyntaxError( 'syntax error' ) );
// returns false

bool = isTypeError( new RangeError( 'range error' ) );
// returns false

bool = isTypeError( new URIError( 'URI error' ) );
// returns false

bool = isTypeError( {} );
// returns false

bool = isTypeError( null );
// returns false
```

</section>

<!-- /.examples -->

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<section class="references">

</section>

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<section class="related">

* * *

## See Also

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

<!-- /.stdlib -->

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<section class="links">

[npm-image]: http://img.shields.io/npm/v/@stdlib/assert-is-type-error.svg
[npm-url]: https://npmjs.org/package/@stdlib/assert-is-type-error

[test-image]: https://github.com/stdlib-js/assert-is-type-error/actions/workflows/test.yml/badge.svg?branch=v0.2.3
[test-url]: https://github.com/stdlib-js/assert-is-type-error/actions/workflows/test.yml?query=branch:v0.2.3

[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/assert-is-type-error/main.svg
[coverage-url]: https://codecov.io/github/stdlib-js/assert-is-type-error?branch=main

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[stdlib]: https://github.com/stdlib-js/stdlib

[stdlib-authors]: https://github.com/stdlib-js/stdlib/graphs/contributors

[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-type-error/tree/deno
[deno-readme]: https://github.com/stdlib-js/assert-is-type-error/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/assert-is-type-error/tree/umd
[umd-readme]: https://github.com/stdlib-js/assert-is-type-error/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/assert-is-type-error/tree/esm
[esm-readme]: https://github.com/stdlib-js/assert-is-type-error/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/assert-is-type-error/blob/main/branches.md

[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/assert-is-type-error/main/LICENSE

[mdn-error]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error

[mdn-type-error]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypeError

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

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

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</section>

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