CODE EXAMPLE FOR JAVASCRIPT

angularjs How to pass option value and label created with ng-repeat triggered by ng-change

angular.module('myApp', [])
  .controller('myCtrl', ['$scope', function($scope) {
    $scope.diskSizes = [{
        "label": "100GB",
        "value": 100
      },
      {
        "label": "250GB",
        "value": 250
      },
      {
        "label": "500GB",
        "value": 500
      },
      {
        "label": "1TB",
        "value": 1000
      },
      {
        "label": "1.5TB",
        "value": 1500
      }
    ]

    $scope.saveData = function() {
      let val = $scope.disk_size;
      let lab = $scope.diskSizes.filter(f => f.value == val)[0].label;
      console.log(lab, val)
    }
  }]);
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.7.5/angular.min.js"></script>
<div ng-app="myApp" ng-controller="myCtrl">

  <select ng-model="disk_size" ng-change="saveData()">
    <option ng-repeat="item in diskSizes" value={{item.value}}>{{item.label}}</option>
  </select>


</div>