node-through - 2.3.8-1 main

Easy way to create a Stream that is both readable and writable.
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Pass in optional write and end methods.
through takes care of pause/resume logic if you use this.queue(data)
instead of this.emit('data', data).
Use this.pause() and this.resume() to manage flow.
Check this.paused to see current flow state.
(write always returns !this.paused).
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This function is the basis for most of the synchronous streams in event-stream.
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Node.js is an event-based server-side JavaScript engine.