npm package: @stdlib/utils-inherit
Description: Implement prototypical inheritance by replacing the prototype of one constructor with the prototype of another constructor.
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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</details>

# Prototypical Inheritance

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

> Implement prototypical inheritance by replacing the prototype of one constructor with the prototype of another constructor.

<section class="intro">

</section>

<!-- /.intro -->

<section class="installation">

## Installation

```bash
npm install @stdlib/utils-inherit
```

</section>

<section class="usage">

## Usage

```javascript
var inherit = require( '@stdlib/utils-inherit' );
```

#### inherit( ctor, superCtor )

Implements prototypical inheritance by replacing the prototype of one constructor with the prototype of another constructor.

<!-- eslint-disable no-restricted-syntax -->

```javascript
function Foo() {
    return this;
}

Foo.prototype.beep = function beep() {
    return 'boop';
};

function Bar() {
    Foo.call( this );
    return this;
}

inherit( Bar, Foo );
```

</section>

<!-- /.usage -->

<section class="notes">

## Notes

-   This function is not designed to work with ES2015/ES6 classes. For ES2015/ES6 classes, use `class` with `extends`.

</section>

<!-- /.notes -->

<section class="examples">

## Examples

<!-- eslint-disable no-restricted-syntax -->

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

```javascript
var inherit = require( '@stdlib/utils-inherit' );

function Foo() {
    return this;
}
Foo.prototype = {};
Foo.prototype.beep = function beep() {
    return 'boop';
};

function Bar() {
    Foo.call( this );
    this._super = Foo.prototype;
    return this;
}

// Set up prototypical inheritance:
inherit( Bar, Foo );

var bar = new Bar();

var bool = ( bar instanceof Bar );
// returns true

bool = ( bar instanceof Foo );
// returns true

bool = bar.beep();
// returns 'boop'
```

</section>

<!-- /.examples -->

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

<section class="related">

</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/utils-inherit.svg
[npm-url]: https://npmjs.org/package/@stdlib/utils-inherit

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

[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/utils-inherit/main.svg
[coverage-url]: https://codecov.io/github/stdlib-js/utils-inherit?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/utils-inherit/tree/deno
[deno-readme]: https://github.com/stdlib-js/utils-inherit/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/utils-inherit/tree/umd
[umd-readme]: https://github.com/stdlib-js/utils-inherit/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/utils-inherit/tree/esm
[esm-readme]: https://github.com/stdlib-js/utils-inherit/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/utils-inherit/blob/main/branches.md

[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/utils-inherit/main/LICENSE

</section>

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