JQuery version Memory Game

var numbers = [1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8];
var lastClickedButtonNumberId = undefined;
var lastClickedButtonNumber = undefined;
var wait = false;
var matches = 0;

shuffle(numbers);

$("button").click(function(event) {
    var turnable = $(this).attr("data-turnable");
    console.log(turnable);
    if (turnable == "true" && !wait && lastClickedButtonNumberId == undefined) {//first click`
        $(this).attr(''game2.js'
data-turnable', 'false');
        $(this).text($(this).data("number")).css('background-color', 'orange');
        lastClickedButtonNumberId = this.id;
        lastClickedButtonNumber = $(this).data("number");
    }   else if (turnable == "true" && !wait && lastClickedButtonNumberId != undefined && lastClickedButtonNumberId != this.id) {//second click
        $(this).attr('data-turnable', 'false');
        $(this).text($(this).data("number"));
        if ($(this).data('number') == lastClickedButtonNumber) {//if id matches
            console.log("its a match");
            $(this).css('background-color', 'green');
            $("#" + lastClickedButtonNumberId).css('background-color', 'green');
            lastClickedButtonNumberId = undefined;
            lastClickedButtonNumber = undefined;
            matches++;
            if (matches == 8) {
                $(".win-container").css('display', 'block');
                $("#6").hide();
                $("#7").hide();
                $("#10").hide();
                $("#11").hide();
            }
        } else {//if id does not match
            $(this).css('background-color', 'orange');
            console.log("it doesn't match");
            wait = true;
            var thisVar = $(this);
            setTimeout(function () {
                thisVar.attr('data-turnable', 'true').css('background-color', 'white').text("");
                $("#" + lastClickedButtonNumberId).attr('data-turnable', 'true').css('background', 'white').text("");
                lastClickedButtonNumberId = undefined;
                lastClickedButtonNumber = undefined;
                wait = false;
            }, 1000);
        }
    }
});


$("button").each(function(index, el) {
    $(this).attr('data-number',  numbers[index]);
});

function shuffle(array) {
    var j, x, i;
    for (i = array.length - 1; i > 0; i--) {
        j = Math.floor(Math.random() * (i + 1));
        x = array[i];
        array[i] = array[j];
        array[j] = x;
    }
    return array;
}