Simple JavaScript object for saving and restoring localStorage items.

gistfile1.txt

var StorageUnit = (function() {
  var is_supported = function() {
    try {
      return 'localStorage' in window && window['localStorage'] !== null;
    } catch (e) {
      return false;
    }
  };

  var _ = window.StorageUnit = {
    supported: is_supported(),

    save: function(key, data) {
      if (!_.supported) { return; }

      var toSave = {
        data: data
      }
      toSave = JSON.stringify(toSave);
      localStorage['StorageUnit_' + key] = toSave;
    },
    get: function(key) {
      if (!_.supported) { return; }

      if (typeof localStorage['StorageUnit_' + key] !== 'undefined') {
        var restoredData = JSON.parse(localStorage['StorageUnit_' + key]);
        return restoredData.data;
      }
    },
    remove: function(key) {
      if (!_.supported) { return; }

      localStorage.removeItem('StorageUnit_' + key);
    }
  };

  return window.StorageUnit;
})();