javascript - AngularJS ng-change 不调用函数

Question

我试图在用户在电子邮件文本框中键入内容时更改引导弹出窗口中的内容。 ng-change 似乎没有进入 updateToolTip() 方法。我是 AngularJS 的新手。如有任何建议，我们将不胜感激。

html 页面

<div ng-controller="LoginController">

  <for name="form" ng-submit="login()">

    <input type="email" name="email" ng-model="user.email" value="{{user.email}}" ng-change="updateToolTip()" popover="{{emailMessage}}" popover-trigger="focus" popover-placement="right" required>

    <button class="btn btn-lg btn-primary btn-block" type="submit" ng-disabled="form.$invalid">Sign in</button>
  </form>

</div>

js

var loginModule = angular.module('loginModule', ['ui.bootstrap']);

// Controller for the login page
loginModule.controller('LoginController', ['$scope', '$http', function($scope, $http) {

    $scope.emailMessage = 'test';   

    $scope.updateToolTip = function() {

        $scope.emailMessage = 'asdfsadf';   
        console.log();
        console.log(' inside function');
        if($scope.user != null) {
            console.log('user not null');
            if($scope.user.email.$dirty && $scope.user.email.$error.email) {
                console.log('email dirty and error');
                $scope.emailMessage = 'Invalid Email!';
            } else if($scope.form.email.$dirty && $scope.form.email.$error.required) {
                console.log('emaildirty and required');
                $scope.emailMessage = 'Email Required';
            }
        }
    }
}]);

Answer 1

将form名称更改为name="user"。喜欢

 <form class="form-signin" name="user" ng-submit="login()">

因为您使用像 user.XXXX 这样的表单模型。

演示 Plunker

[编辑]

我会这样编写验证:

<input 
   type="email"
   name="email"
   class="form-control"
   placeholder="Email address"
   ng-model="user.email"
   popover="{{emailMessage}}"
   popover-trigger="focus"
   popover-placement="right"
   required
   >
    <span class="error" ng-show="mailform.email.$error.required">required</span>
    <span class="error" ng-show="mailform.email.$error.email">invalid email</span>


    <input 
    type="password"
    name="password"
    class="form-control"
    placeholder="Password"
    ng-model="user.password"
    value="{{user.password}}" required    >
    <span class="error" ng-show="mailform.password.$error.required">required</span>

演示 2 Plunker

也许这个例子也可以帮助您:演示 3 Plunker