app.js

var connect = require('connect'),
    sharejs = require('ShareJS').server;

var server = connect(
      connect.logger(),
      connect.static(__dirname + '/html')
);

var options = {db: {type: 'memory'}}; // See docs for options. {type: 'redis'} to enable persistance.

// Attach the sharejs REST and Socket.io interfaces to the server
sharejs.attach(server, options);

server.listen(8000);
console.log('Server running at http://127.0.0.1:8000/');

var client = require('ShareJS').client;

// Open the 'hello' document, which should have type 'text':
client.open('hello', 'text', 'http://localhost:8000/sjs', function(error, doc) {
    // Insert some text at the start of the document (position 0):
    doc.insert("Hi there!\n", 0);

    // Get the contents of the document for some reason:
    console.log(doc.snapshot);

    doc.on('change', function(op) {
        console.log('Version: ' + doc.version);
    });

    // Close the doc if you want your node app to exit cleanly
    // doc.close();
});