How loadVote with localStorage? [on hold]

I have a program of Vote Up (one time by user), I can save this vote too "BUT", I need to see my +1 when I refresh page, because this disappear when refresh page.

var voteUp = document.getElementById('vote-up');

var handUp = once(function() {
    var total = Number(voteUp.innerHTML);
    total += 1;
    voteUp.innerHTML = total;
    saveVote();
});

voteUp.addEventListener('click', handUp);

var handDown = once(function() {
    var total = Number(voteDown.innerHTML);
    total -= 1;
    voteDown.innerHTML = total;
    saveVote();
});


function saveVote() {
    var votes = voteUp, voteDown;
    var data = Array.prototype.map.call(votes, function(vote){
        return[vote];
    });
        localStorage.setItem('data', JSON.stringify(data));
            console.log('saveVote');
}

function loadVote() {
    var getLocal = JSON.parse(localStorage.getItem('data'));
        if(!getLocal){
            return;
        }
            Array.prototype.map.call(getLocal, function(vote){
                return total;
            });
        console.log('loadVote');
}

loadVote();