UPDATE : After the Google IO'13 started, the experiment has been moved to a new home : https://developers.google.com/events/io/experiment

If you just want the GoogleIO'13 easter eggs codes, jump directly to the bottom if this post. If you're interested in how I got'em all, read along.

So, the main codebase is located in the /js/app.min.js of the site. But it's compiled and pretty much unreadable. Luckily, I have Sight, a Chrome extension that indents/prettifies the code. But still, it's still not readable.

I had to browse through the code to find some telltale signs, and what do you know, I find this :

ww.mode.register('home', ww.mode.HomeMode, null)
ww.mode.register('cat', ww.mode.CatMode, 231, 8)
var isAndroid = navigator.userAgent.match(/Android/)
isAndroid || ww.mode.register('space', ww.mode.SpaceMode, 42, 8)
ww.mode.register('pong', ww.mode.PongMode, 129, 8)
ww.mode.register('bacon', ww.mode.BaconMode, 144, 8)
ww.mode.register('simone', ww.mode.SimoneMode, 211, 8)
ww.mode.register('eightbit', ww.mode.EightBitMode, 83, 8)
ww.util.getAudioContextConstructor() &&
  (ww.mode.register('song', ww.mode.SongMode, 219, 8),
  ww.mode.register('synth', ww.mode.SynthMode, 136, 8))
ww.mode.register('ascii', ww.mode.AsciiMode, 127, 8)
ww.mode.register('bowling', ww.mode.BowlingMode, 117, 8)
ww.mode.register('rocket', ww.mode.RocketMode, 69, 8)
ww.mode.register('burger', ww.mode.BurgerMode, 57, 8)

It doesn't say much, but at least there is some chance I could decipher this mess.

Then I searched for the ww.mode.register function,  which is :

ww.mode.register = function (a, b, c, d) {
  ww.mode.modes[a] = {
    klass: b,
    pattern: c,
    len: d,
  }
}

Klass, Pattern, and len. I looked for where is klass (easier and distinguishable) is called/located through the code, and I found this snippet, which unlocks pretty much everything :

for (c in a)
  a.hasOwnProperty(c) &&
    a[c].pattern &&
    ((d = a[c]),
    (b[c] = {
      klass: d.klass,
      binaryPattern: ww.util.pad(d.pattern.toString(2), d.len),
    }))

Three things : ww.util.pad, d.pattern, and d.len.

ww.util.pad pretty much does an d.len-bit binary conversion  (code below), in our case, always 8bit, and d.pattern is the c param in the ww.mode.register function,

ww.util.pad = function (a, b) {
  for (var c = '' + a; c.length < b; ) c = '0' + c
  return c
}

Now everything is crystal clear - All I had to do is to rewrite the ww.util.pad as a standalone function :

function io(a, b) {
  for (var c = '' + a; c.length < b; ) c = '0' + c
  return c
}

And then, it's just a matter of calling io() with the different patterns converted to binary:

var a = 219
io(a.toString(2), 8) //outputs 11011011, which converts to IIOIIOII

List of all the GoogleIO'13 easter eggs and codes

Go to GoogleIO'13 site, and enter one of the following codes :

• Cat : IIIOOIII
• Space: OOIOIOIO
• Pong : IOOOOOOI
• Bacon : IOOIOOOO
• Simone : IIOIOOII
• Eightbit : OIOIOOII
• Synth : IOOOIOOO
• Song : IIOIIOII
• ASCII : OIIIIIII
• Bowling : OIIIOIOI
• Rocket : OIOOOIOI
• Burger : OOIIIOOI