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readme.md
1# is-stream [![Build Status](https://travis-ci.org/sindresorhus/is-stream.svg?branch=master)](https://travis-ci.org/sindresorhus/is-stream) 2 3> Check if something is a [Node.js stream](https://nodejs.org/api/stream.html) 4 5 6## Install 7 8``` 9$ npm install --save is-stream 10``` 11 12 13## Usage 14 15```js 16const fs = require('fs'); 17const isStream = require('is-stream'); 18 19isStream(fs.createReadStream('unicorn.png')); 20//=> true 21 22isStream({}); 23//=> false 24``` 25 26 27## API 28 29### isStream(stream) 30 31#### isStream.writable(stream) 32 33#### isStream.readable(stream) 34 35#### isStream.duplex(stream) 36 37#### isStream.transform(stream) 38 39 40## License 41 42MIT © [Sindre Sorhus](https://sindresorhus.com) 43