Anil Singh | Code-sample.com

There are different types of event available in the Firebase and some of the below even looks like - 1.      child_added event 2.      child_changed event 3.      child_removed  event Example for child added Event– var usersRef = firebase . database (). ref ( "users/" ); usersRef . orderByChild ( "name" ). startAt ( "Anil" ). on ( "child_added" , function ( result ) {         console . log ( "Start at filter - " + result . val (). name ); }); Example for child changed Event – var usersRef = firebase . database (). ref ( "users/" ); usersRef . on ( "child_changed" , function ( result ) {     var user = result . val ();     console . log ( "The updated user name is - " + result . name ); }); Example for child removed Event – var usersRef = firebase . database (). ref ( "users/" ); users . on ( "child_removed" , ...