​

var node = Baobab.dynamicNode;

var identity = function (x) { return x; };

​

var tree = new Baobab({

  one: {

    foo: node(['one', 'bar'], identity),

    bar: 23

  },

  two: {

    foo: node(['one', 'foo'], identity),

    bar: 23

  },

  three: node(['two'], function(x) {           

    console.log('this should fire'); 

    return x;

  })

});

​

​

var watcher = tree.watch({

  finally: ['three']

});

​

watcher.on('update', function (x) {

  console.log('watcher was called');

});

​

// Works, watcher is called

tree.select('two', 'bar').set(25);

​

// Doesn't work!

tree.select('one', 'bar').set(25);

​

console.log('Watcher should be called twice');

​