使用angular js单击applyAll按钮时更改选中复选框的文本区域值

<input type="checkbox" ng-model="isChecked">选中复选框
<textarea ng-model="textAreaValue"></textarea>
<button ng-click="applyAll()">应用全部</button>

angular.module('myApp', [])
  .controller('myController', function($scope) {
    $scope.isChecked = false;
    $scope.textAreaValue = '';

    $scope.applyAll = function() {
      if ($scope.isChecked) {
        $scope.textAreaValue = '选中复选框';
      } else {
        $scope.textAreaValue = '';
      }
    };
  });

<div ng-app="myApp" ng-controller="myController">
  <input type="checkbox" ng-model="isChecked">选中复选框
  <textarea ng-model="textAreaValue"></textarea>
  <button ng-click="applyAll()">应用全部</button>
</div>