অ্যাঙ্গুলারজেএস watchCollection

<!DOCTYPE html>
<html ng-app="app">
<body>

  <div ng-controller="app">
    <button ng-click="items.push('আম')">যোগ</button>
    <p>{{items}}</p>
  </div>

  <script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.8.3/angular.min.js"></script>
  <script>
    angular.module("app", [])
      .controller("app", function($scope) {
        $scope.items = ["আপেল", "আঙ্গুর", "কমলা", "কলা"];

        $scope.$watchCollection("items", function(n, o) {
          console.log(n);
        });
      });
  </script>

</body>
</html>