firebase - example - one webpage sending data to another

firebase-receiver.html

<script src="https://www.gstatic.com/firebasejs/4.1.3/firebase.js"></script>
<script>
// Initialize Firebase
var config = {
   // YOUR CONFIG goes here - https://firebase.google.com/docs/web/setup#add_firebase_to_your_app
};
var firebaseApp = firebase.initializeApp(config);
var rootRef = firebase.database().ref();
// Get a reference to the /users/ada node
var adaRef = firebase.database().ref("users/ada");

adaRef.on('value', function(snapshot){
	console.log('latency',  Date.now() - snapshot.val().time);
});
</script>

firebase-sender.html

<script src="https://www.gstatic.com/firebasejs/4.1.3/firebase.js"></script>
<script>
// Initialize Firebase
var config = {
    // YOUR CONFIG goes here - https://firebase.google.com/docs/web/setup#add_firebase_to_your_app
};
var firebaseApp = firebase.initializeApp(config);
var rootRef = firebase.database().ref();
// Get a reference to the /users/ada node
var adaRef = firebase.database().ref("users/ada");

adaRef.set({
	arApp: 'loaded'
});

setInterval(function(){
	console.log('time')
	adaRef.set({
		time : Date.now()
	});
}, 100)
</script>