npm package: @stdlib/number-float64-reviver
Description: Revive a JSON-serialized number.
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>
  <p>The library is fully decomposable, being architected in such a way that you can swap out and mix and match APIs and functionality to cater to your exact preferences and use cases.</p>
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</details>

# reviveNumber

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

> Revive a JSON-serialized number.

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<section class="intro">

</section>

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<!-- Package usage documentation. -->

<section class="installation">

## Installation

```bash
npm install @stdlib/number-float64-reviver
```

</section>

<section class="usage">

## Usage

```javascript
var reviveNumber = require( '@stdlib/number-float64-reviver' );
```

#### reviveNumber( key, value )

Revives a JSON-serialized number.

```javascript
var parseJSON = require( '@stdlib/utils-parse-json' );

var str = '{"type":"float64","value":"NaN"}';

var buf = parseJSON( str, reviveNumber );
// returns NaN
```

For details on the JSON serialization format, see [`@stdlib/number-float64/to-json`][@stdlib/number/float64/to-json].

</section>

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<section class="notes">

</section>

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<!-- Package usage examples. -->

<section class="examples">

## Examples

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

```javascript
var parseJSON = require( '@stdlib/utils-parse-json' );
var number2json = require( '@stdlib/number-float64-to-json' );
var reviveNumber = require( '@stdlib/number-float64-reviver' );

var str = JSON.stringify( number2json( NaN ) );
console.log( str );
// => '{"type":"float64","value":"NaN"}'

var out = parseJSON( str, reviveNumber );
if ( out instanceof Error ) {
    throw out;
}
console.log( out );
// => NaN
```

</section>

<!-- /.examples -->

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* * *

## See Also

-   <span class="package-name">[`@stdlib/number-float64/to-json`][@stdlib/number/float64/to-json]</span><span class="delimiter">: </span><span class="description">return a JSON representation of a number.</span>

</section>

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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].

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[npm-url]: https://npmjs.org/package/@stdlib/number-float64-reviver

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[test-url]: https://github.com/stdlib-js/number-float64-reviver/actions/workflows/test.yml?query=branch:v0.2.3

[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/number-float64-reviver/main.svg
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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/number-float64-reviver/tree/deno
[deno-readme]: https://github.com/stdlib-js/number-float64-reviver/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/number-float64-reviver/tree/umd
[umd-readme]: https://github.com/stdlib-js/number-float64-reviver/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/number-float64-reviver/tree/esm
[esm-readme]: https://github.com/stdlib-js/number-float64-reviver/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/number-float64-reviver/blob/main/branches.md

[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/number-float64-reviver/main/LICENSE

[@stdlib/number/float64/to-json]: https://www.npmjs.com/package/@stdlib/number-float64-to-json

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