simply.js counter

counter.js

var count = parseInt(localStorage.getItem('count')) || 0;

simply.on('singleClick', function(e) {
  if (e.button === 'up') { 
    count+=1; simply.subtitle(count); 
  } else if (e.button === 'down') { 
    count-=1; simply.subtitle(count); }
  localStorage.setItem('count', count);
});

simply.text({ title: 'Counter', subtitle: count });