Alias for eval global.
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> Alias for [eval][mdn-eval] global.
``bash`
npm install @stdlib/utils-eval
`javascript`
var evil = require( '@stdlib/utils-eval' );
#### evil( str )
Alias for [eval][mdn-eval] global.
`javascript`
var v = evil( '54321' );
// returns 120
- 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.
`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() );
}
`
- [@stdlib/utils-eval-cli][@stdlib/utils-eval-cli]: CLI package for use as a command-line utility.
*
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
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---
See [LICENSE][stdlib-license].
Copyright © 2016-2026. The Stdlib [Authors][stdlib-authors].
[@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
[chat-image]: https://img.shields.io/badge/zulip-join_chat-brightgreen.svg
[chat-url]: https://stdlib.zulipchat.com
[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