Firebase onChildAdded for new data

Question

If I have a list of 50,000 items stored in my firebase reference, and 5 items have been added to that list since the last time the client was online and listening, which cal

Answer 1

You should use on('child_changed'). Normally, on() is used to listen for data changes at a particular location. However, on('child_changed') notifies you

when the data stored in a child (or any of its descendants) changes.

It will pass a data snapshot to the callback that contains the new child contents. Keep in mind that a single child_changed event may potentially represent multiple changes to the child.