angular中$watch踩的坑
发布时间:2020-12-17 10:04:13 所属栏目:安全 来源:网络整理
导读:!DOCTYPE html html ng-app= "myApp" head meta charset= "UTF-8" title angular demo/ title script src= "../bower_components/angular/angular.min.js" / script / head body div ng-controller= " containerCtrl " p 在输入框中输入/ p p 姓名: input t
<!DOCTYPE html> <html ng-app="myApp"> <head> <meta charset="UTF-8"> <title>angular demo</title> <script src="../bower_components/angular/angular.min.js"></script> </head> <body> <div ng-controller="containerCtrl"> <p>在输入框中输入</p> <p>姓名:<input type="text" ng-model="name"></p> <p >{{name}}</p> <p >{{sex}}</p> </div> <script> var app = angular.module('myApp',[]); app.controller('containerCtrl',function($scope){ /*$scope.$watch($scope.name,function(name,oldname,scope){ debugger; if (oldname=='123') { scope.sex='女' } else { scope.sex='男' } });*/ $scope.sex = '男' $scope.$watch($scope.sex,function(newValue,oldValue){ // var name =$scope.name; console.log(newValue); $scope.sex = newValue>18 ? '女' : '男'; }) }); </script> </body> </html> 这个时候$watch内部只执行一次console.log(newValue); 翻文档例子,整了半天才发现 (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |