Unlink listener for parent does it applied to children in Firebase

Question

I am using firebase to synch data in a real time app. After some treatment, I want to unlink all listeners added. So I put

myRef.off();

But

Answer 1

Let's try it.

ref.on("value", function(snapshot) { 
  console.log("parent: "+JSON.stringify(snapshot.val()));
});
ref.child("child").on("value", function(snapshot) { 
  console.log("child: "+JSON.stringify(snapshot.val()));
});
ref.set('1');
ref.child('child').set('2');
ref.off();
ref.child('child').set('3');
ref.child('child').off();
ref.set('4');

The output:

parent: "1"
child: "2"
parent: {"child":"2"}
child: "3"

So after calling off on the parent listener, the child listener still fires ("3"). But if we get the same child and call off, it doesn't for anymore ("4").

JSBin: http://jsbin.com/wutaza/edit?js,console

Conclusion: off() doesn't remove listeners from child nodes.