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