如何根据angularjs onchange中下拉选项的选定值在div上添加动态id

<select ng-model="selectedValue" ng-change="addDynamicId()">
  <option value="option1">Option 1</option>
  <option value="option2">Option 2</option>
  <option value="option3">Option 3</option>
</select>

$scope.addDynamicId = function() {
  // 根据选定值生成动态id
  var dynamicId = "dynamicId_" + $scope.selectedValue;
  
  // 将动态id赋值给div的id属性
  angular.element(document.querySelector('#myDiv')).attr('id', dynamicId);
};

<div id="myDiv">This is a div</div>