mckamey / konami-js

Lightweight key sequence easter eggs in JavaScript

The Konami Code for JavaScript

Konami-js is a tiny JavaScript implementation of the Konami Code, but also monitors any arbitrary keyboard sequence.

↑ ↑ ↓ ↓ ← → ← → B A

Konami.code(…) creates an event handler which you attach to any element you would like:

$(document).on('keyup',

	Konami.code(function() {
		alert('Congratulations, 30 lives!');
	})

);

Alternatively, you can specify a different keyCode sequence to monitor with Konami.sequence(…):

$(document).on('keyup',

	Konami.sequence(
		65, 66, 67, 68, 69, 70, 71,
		72, 73, 74, 75, 76, 77, 78, 79, 80,
		81, 82, 83,
		84, 85, 86,
		87, 88, 89, 90,
		function() {
			alert('Now I know my ABCs.\r'+
				   Next time won't you sing with me?');
		})

);

Try it out!

Copyright © 2012, Stephen M. McKamey