is-stream

Check if something is a Node.js stream

Install

$ npm install is-stream

Usage

```js const fs = require(‘fs’); const isStream = require(‘is-stream’);

isStream(fs.createReadStream(‘unicorn.png’)); //=> true

isStream({}); //=> false ```

API

isStream(stream)

Returns a boolean for whether it’s a Stream.

isStream.writable(stream)

Returns a boolean for whether it’s a stream.Writable.

isStream.readable(stream)

Returns a boolean for whether it’s a stream.Readable.

isStream.duplex(stream)

Returns a boolean for whether it’s a stream.Duplex.

isStream.transform(stream)

Returns a boolean for whether it’s a stream.Transform.

Related

• is-file-stream - Detect if a stream is a file stream