How I implimented Add, Delete, and Clone for 'Notes Vault'

gistfile1.js

$scope.removeItem = function() {
  $scope.$storage.notes.splice(document.getElementById('selectedNote').value, 1);
  document.getElementById('title').value = '';
  document.getElementById('content').value = '';
}
$scope.addItem = function() {
  $scope.$storage.notes.push({
    "title": "",
    "content": ""
  });
}
$scope.cloneItem = function() {
  $scope.$storage.notes.push({
    "title": document.getElementById('title').value,
    "content": document.getElementById('content').value
  });
}