Méthode : Storage.getItem()

<script type="text/javascript">
 for (var i=0; i<window.localStorage.length; i++) {
   var cle=window.localStorage.key(i);
   var value=window.localStorage.getItem(cle);
   if (value.length>50) {
     value=value.substring(0,50)+"...";
   }
   console.log("Clé N°"+i+" "+cle+" = "+value);
 }
</script>