npm package: @stdlib/streams-node-stdin
Description: Standard input.
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>

# Standard Input

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

> [Standard input][standard-streams].

<section class="installation">

## Installation

```bash
npm install @stdlib/streams-node-stdin
```

</section>

<section class="usage">

## Usage

```javascript
var stdin = require( '@stdlib/streams-node-stdin' );
```

#### stdin

[Standard input][standard-streams] as a [Readable stream][readable-stream].

<!-- run-disable -->

```javascript
var string2buffer = require( '@stdlib/buffer-from-string' );
var Buffer = require( '@stdlib/buffer-ctor' );

var data = [];
var len = 0;

stdin.on( 'readable', onReadable );
stdin.on( 'error', onError );
stdin.on( 'end', onEnd );

function onReadable() {
    var chunk;
    while ( true ) {
        chunk = stdin.read();
        if ( chunk === null ) {
            break;
        }
        if ( typeof chunk === 'string' ) {
            chunk = string2buffer( chunk );
        }
        data.push( chunk );
        len += chunk.length;
    }
}

function onError( error ) {
    if ( error ) {
        console.error( error.message );
    }
}

function onEnd() {
    data = Buffer.concat( data, len );
    console.log( data.toString() );
    // => '...'
}
```

</section>

<!-- /.usage -->

<section class="examples">

## Examples

<!-- run-disable -->

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

```javascript
var proc = require( 'process' );
var stdin = require( '@stdlib/streams-node-stdin' );
var stdout = require( '@stdlib/streams-node-stdout' );

// Set the encoding:
stdin.setEncoding( 'utf8' );

// Create an echo stream:
stdin.pipe( stdout );

// Push data to `stdin`:
stdin.push( 'beep' );
stdin.push( ' ' );
stdin.push( 'boop' );
stdin.push( '\n' );

// End the stream:
stdin.push( null );

// Ensure the process closes:
setTimeout( proc.exit, 1000 );
```

</section>

<!-- /.examples -->

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

<section class="related">

</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 -->

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<section class="links">

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

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

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

[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/streams-node-stdin/main/LICENSE

[standard-streams]: https://en.wikipedia.org/wiki/Standard_streams

[readable-stream]: https://nodejs.org/api/stream.html#stream_class_stream_readable

</section>

<!-- /.links -->