Sandbox

<script> // Show all keys in localStorage var logDiv = document.getElementById('debug-log'); if (!logDiv) {

   logDiv = document.createElement('pre');
   logDiv.id = 'debug-log';
   document.body.appendChild(logDiv);

} logDiv.innerText = ; for (var i = 0; i < localStorage.length; i++) {

   var key = localStorage.key(i);
   var value = localStorage.getItem(key);
   logDiv.innerText += key + ' → ' + value + '\n';

} </script>