var config = {

    apiKey: "AIzaSyCvpYQu44zmRXA0XQkcxEuakyytRsnWXSc",

    authDomain: "stackoverflow.firebaseapp.com",

    databaseURL: "https://stackoverflow.firebaseio.com",

    storageBucket: "project-8080059325282098184.appspot.com",

  };

  firebase.database.enableLogging(true);

  firebase.initializeApp(config);

​

​

var ref = firebase.database().ref("38343810/messages/233110");

​

var ul = document.getElementById('dates');

​

ref.on('child_added', function(snapshot) {

  var msg    = snapshot.val();

  var date = new Date(msg.timestamp);

  var id = 'date_'+ date.toISOString().substring(0,10); // e.g. 'day_2016-07-13'

  // get or create the li for this date from the DOM

  var li = document.getElementById(id);

  if (!li) {

    li = document.createElement('li');

    li.id = id;

    li.innerHTML = '<b>' + date.toDateString() + '</b><br>';

    ul.appendChild(li);

  }

  li.innerHTML = li.innerHTML + msg.message + '<br>';

}, function(error) {

  console.error(error);

});