如何使用Angular JS根据特定的下拉值过滤typeahead

<script src="angular.js"></script>
<script src="typeahead.js"></script>

<div ng-app="myApp">
  <!-- 页面内容 -->
</div>

angular.module('myApp', [])
  .controller('myController', function($scope) {
    // 控制器逻辑
  });

<div ng-controller="myController">
  <select ng-model="selectedValue" ng-options="option for option in options"></select>
  <input type="text" ng-model="filterValue" typeahead="item for item in items | filter:filterValue">
</div>

angular.module('myApp', [])
  .controller('myController', function($scope, $filter) {
    $scope.options = ['Option 1', 'Option 2', 'Option 3'];
    $scope.items = ['Item 1', 'Item 2', 'Item 3', 'Item 4', 'Item 5'];

    $scope.$watch('selectedValue', function(newValue) {
      $scope.filterValue = '';
      $scope.filteredItems = $filter('filter')($scope.items, newValue);
    });
  });