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- # is-stream [](https://travis-ci.org/sindresorhus/is-stream)
- > Check if something is a [Node.js stream](https://nodejs.org/api/stream.html)
- ## Install
- ```
- $ npm install --save is-stream
- ```
- ## Usage
- ```js
- const fs = require('fs');
- const isStream = require('is-stream');
- isStream(fs.createReadStream('unicorn.png'));
- //=> true
- isStream({});
- //=> false
- ```
- ## API
- ### isStream(stream)
- #### isStream.writable(stream)
- #### isStream.readable(stream)
- #### isStream.duplex(stream)
- #### isStream.transform(stream)
- ## License
- MIT © [Sindre Sorhus](https://sindresorhus.com)
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