epsilon

JQuery and Node Implementation of the epsilon greedy algorithm.

This project is based on the blog post by Steve Hanov, 20 lines of code that will beat A/B testing every time.

Epsilon will keep a track of the conversion rate of elements of your page. You can include multiple versions of a div on your page. Epsilon will chose the version with the best conversion rate 90% of the time. The other 10% Epsilon will chose a random version.

Installation

npm install epsilon

Server Setup

var epsilon = require('epsilon');

app.configure(function(){
  app.use(epsilon.middleware());
  epsilon.bind(app);
});

Client Setup

Include the epsilon client script in your html. This script is exposed automatically in the epsilon middleware.

<script type='text/javascript' src='epsilon/epsilon_greedy.js'/>

Creating a test

<div class='epsilon-test' data-testname='h1-color-test'>
  <div class='epsilon-lever' data-levername='red-h1'>
    <h1 style="color:red;">Buy Some Stuff</h1>
  </div>
  <div class='epsilon-lever' data-levername='blue-h1'>
    <h1 style="color:blue;">Buy Some Stuff</h1>
  </div>
  <a class='epsilon-reward' href='/checkout'>Check out</a>
</div>

Thanks to @JacksonTian for giving us the module name, Epsilon.