为什么有时 ng-init 不触发 $watch 监听器？

Question

我在我的应用程序中执行了以下代码，有时 ng-init 没有触发 $watch。有什么想法吗？

HTML

<div ng-controller="MyCtrl">
   <p ng-init="stages = 'coco'">{{x}}</p>
</div>

控制器

var myApp = angular.module('myApp',[]);

   function MyCtrl($scope) {

       $scope.$watch("stages", function() {
            alert($scope.stages);
       });
   }

Answer 1

不，根据您的代码，您没有在任何地方添加 ng-app。

DEMO

var myApp = angular.module('myApp',[]);
myApp.controller('MyCtrl',function($scope){

       $scope.$watch("stages", function() {
            alert($scope.stages);
       });
 });

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="myApp" ng-controller="MyCtrl">
   <p ng-init="stages = 'coco'">{{x}}</p>
</div>

为什么有时 ng-init 不触发 $watch 监听器？

Why sometimes doesn't ng-init trigger $watch listener?

javascript

angularjs

watch

ng-init