# Standard Input [![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url] > [Standard input][standard-streams].
## Installation ```bash npm install @stdlib/streams-node-stdin ```
## Usage ```javascript var stdin = require( '@stdlib/streams-node-stdin' ); ``` #### stdin [Standard input][standard-streams] as a [Readable stream][readable-stream]. ```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() ); // => '...' } ```
## Examples ```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 ); ```
* * * ## 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 © 2016-2022. The Stdlib [Authors][stdlib-authors].