firebase get key of last node created

Question

I am trying to get the key of the last node I have just pushed to on firebase but my code keeps erroring

constructor (props) {
super(props)
this.cartFirebase = f         


        

Answer 1

You need to use limitToLast function.

this.cartFirebase.limitToLast(1).on('child_added', function(childSnapshot) {

     var snap = childSnapshot.val();

});