npm package: @stdlib/utils-eval
Description: Alias for eval global.
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>

# eval

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

> Alias for [`eval`][mdn-eval] global.

<section class="installation">

## Installation

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

</section>

<section class="usage">

## Usage

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

#### evil( str )

Alias for [`eval`][mdn-eval] global.

```javascript
var v = evil( '5*4*3*2*1' );
// returns 120
```

</section>

<!-- /.usage -->

<section class="notes">

## Notes

-   A reference to [`eval`][mdn-eval] **is** treated differently by the compiler. For example, when evaluating code containing block-scoped declarations (e.g., `let`, `const`, `function`, `class`), the compiler may throw an `error` complaining that block-scoped declarations are **not** yet supported outside of `strict mode`. One possible workaround is to include `"use strict";` in the evaluated code, as done in the example below.

</section>

<!-- /.notes -->

<section class="examples">

## Examples

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

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

var ctors;
var fcn;
var i;

function compile( ctor ) {
    var name;
    var str;

    name = ctor.match( /^(\w*)Array$/ )[ 1 ];
    name += 'DataArray';

    str = '';
    str += '(function create(){';
    str += '"use strict";';
    str += 'class '+name+' extends '+ctor+'{';
    str += 'constructor(x){';
    str += 'super(x);';
    str += '}';
    str += '}';
    str += 'return '+name+';';
    str += '})();';
    return str;
}

ctors = [
    'Int8Array',
    'Uint8Array',
    'Uint8ClampedArray',
    'Int16Array',
    'Uint16Array',
    'Int32Array',
    'Uint32Array',
    'Float32Array',
    'Float64Array',
    'Array'
];

for ( i = 0; i < ctors.length; i++ ) {
    fcn = evil( compile( ctors[i] ) );
    console.log( fcn.toString() );
}
```

</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/utils-eval-cli`][@stdlib/utils-eval-cli]</span><span class="delimiter">: </span><span class="description">CLI package for use as a command-line utility.</span>


</section>

<!-- /.related -->

<!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->


<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 -->

<!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->

<section class="links">

[@stdlib/utils-eval-cli]: https://www.npmjs.com/package/@stdlib/utils-eval-cli

[npm-image]: http://img.shields.io/npm/v/@stdlib/utils-eval.svg
[npm-url]: https://npmjs.org/package/@stdlib/utils-eval

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

[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/utils-eval/main.svg
[coverage-url]: https://codecov.io/github/stdlib-js/utils-eval?branch=main

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

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

[cli-section]: https://github.com/stdlib-js/utils-eval#cli
[cli-url]: https://github.com/stdlib-js/utils-eval/tree/cli
[@stdlib/utils-eval]: https://github.com/stdlib-js/utils-eval/tree/main

[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-eval/tree/deno
[deno-readme]: https://github.com/stdlib-js/utils-eval/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/utils-eval/tree/umd
[umd-readme]: https://github.com/stdlib-js/utils-eval/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/utils-eval/tree/esm
[esm-readme]: https://github.com/stdlib-js/utils-eval/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/utils-eval/blob/main/branches.md

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

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

</section>

<!-- /.links -->