Textrank-node is an implementation of text rank algorithm written in Node JS. You can simply add this module to your project and start right away.
This code relies a lot on natural (which is an awesome library) for processing NLP related stuff.
If you're just looking to use textrank-node without your own node application, you can install via NPM like so:
npm install textrank-node
If you're interested in contributing to textrank-node just fork it away.
As of this version, there is only one implementation of summarization, which you can use it like below:
var textrank = require('textrank-node');
var summarizer = new textrank();
summarizer.summarize('some document here', 4);
The code above will make 4 sentences summary from a document or collection of string.