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Web browser & node.js client library for SeatGeek's Sixpack A/B testing framework
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Node / Browser library for SeatGeek's Sixpack AB testing framework.


Include the "sixpack.js" script. The sixpack object will be added to your environment. In the browser do the following:

<script src="sixpack.js"></script>

If you're using sixpack-client with node.js start by installing it:

$ npm install sixpack-client

then require the "sixpack-client" module:

var sixpack = require("sixpack-client");


Check out the examples in the examples directory for some quick examples for how to use the library. Here's a very basic example in node:

var sixpack = require('sixpack-client');

var session = new sixpack.Session();
session.participate("test-exp", ["alt-one", "alt-two"], function (err, res) {
  if (err) throw err;
  alt =
  if (alt == 'alt-one') {
    console.log('default: ' + alt);
  } else {

When instantiating the session object you can pass optional params client_id, base_url, ip_address, user_agent

var sixpack = new sixpack.Session({client_id: 12345, base_url: '', ip_address: '', user_agent: 'ChromeBot'});

Client ID is a previously generated client id that you've previously stored. IP Address and User Agent are used for bot detection.

Forcing an Alternative

For debugging / design work it can be useful to force a page to load using a specific alternative. To force an alternative use the force parameter to participate(). If you're using sixpack.js in the browser you can also just include a query parameter, e.g. /your-page?sixpack-force-EXPERIMENT_NAME=ALTERNATIVE_NAME.


  1. Fork it
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Write and run tests with npm test (requires mocha)
  4. Commit your changes (git commit -am 'Added some feature')
  5. Push to the branch (git push origin my-new-feature)
  6. Create new Pull Request
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