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| [6a3a178] | 1 | # is-stream [](https://travis-ci.org/sindresorhus/is-stream)
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| 2 |
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| 3 | > Check if something is a [Node.js stream](https://nodejs.org/api/stream.html)
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| 4 |
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| 5 |
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| 6 | ## Install
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| 7 |
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| 8 | ```
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| 9 | $ npm install --save is-stream
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| 10 | ```
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| 11 |
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| 12 |
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| 13 | ## Usage
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| 14 |
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| 15 | ```js
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| 16 | const fs = require('fs');
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| 17 | const isStream = require('is-stream');
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| 18 |
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| 19 | isStream(fs.createReadStream('unicorn.png'));
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| 20 | //=> true
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| 21 |
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| 22 | isStream({});
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| 23 | //=> false
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| 24 | ```
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| 25 |
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| 26 |
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| 27 | ## API
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| 28 |
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| 29 | ### isStream(stream)
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| 30 |
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| 31 | #### isStream.writable(stream)
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| 32 |
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| 33 | #### isStream.readable(stream)
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| 34 |
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| 35 | #### isStream.duplex(stream)
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| 36 |
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| 37 | #### isStream.transform(stream)
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| 38 |
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| 39 |
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| 40 | ## License
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| 41 |
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| 42 | MIT © [Sindre Sorhus](https://sindresorhus.com)
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