bower install git://github.com/chriswebb/LockableStorage.git

LockableStorage.lock('key', function () {
    // exclusive access to localStorage['key']
});

LockableStorage.get('key', function(value) { 
    // gets localStorage['key']
    // uses value as a paramter to the callback function
    // callback does not hold the lock.
});

LockableStorage.set('key', 'value', function() {
// sets localStorage['key'] to 'value' then runs callback
// callback does not hold the lock.
    // can be removed if no-callback necessary.
});

LockableStorage.remove('key', function(value) { 
// value of key is removed then runs callback
    // callback does not hold the lock.
});