Key controls without conditions

key-controls-without-conditions

window.addEventListener("keydown", function (e) {
    var newKp = 'key' + e.keyCode,
      keyID,
      key = {
        'key38': function () {
            alert('up');
        },
            'key40': function () {
            alert('down');
        },
            'key37': function () {
            alert('left');
        },
            'key39': function () {
            alert('right');
        },
            'key32': function () {
            alert('space');
        },
        action: function (keyID) {
            this[keyID]();
        }
    }.action(newKp);
});