Receive notifications of newly pushed children

Question

I\'m .push() ing into a firebase reference.

I want a listener to be able to come online, and then be notified only of newly .push() ed children

Answer 1

startAt() returns the oldest (first) records, where endAt() returs the last (newest) records, assuming you've used push() to store them.

So this would give you the newest entries:

 ref.endAt().limit(1)

Keep in mind that the first record you receive will be previously existing, so it should be discarded in the use case that only data added after a user comes online is of value.