Firebase: Get the last item in a list. This snippet retrieves only the last item in a list.

firebase_last_item.js

// Run test @ http://jsfiddle.net/FNZKS/

function makeList(ref) {
  var fruits = ["banana", "apple", "grape", "orange"];
  for (var i = 0; i < fruits.length; i++) {
    ref.push(fruits[i]);
  }
}

function getLastFromList(ref, cb) {
  ref.limit(1).once("child_added", function (snapshot) {
    cb(snapshot.val());
  });
}

// Running this should popup an alert with "orange".
function go() {
  var testRef = new Firebase("https://example.firebaseIO-demo.com/");
  makeList(testRef);
  getLastFromList(testRef, function (val) {
    alert(val);
  });
}

this.firebase.list('listname', ref => ref.limitToLast(1)).valueChanges()