angularjs中的密码检查指令

Question

我正在写一个密码验证指令：

 Directives.directive("passwordVerify",function(){
    return {
        require:"ngModel",
        link: function(scope,element,attrs,ctrl){
            ctrl.$parsers.unshift(function(viewValue){
                var origin = scope.$eval(attrs["passwordVerify"]);
                if(origin!==viewValue){
                    ctrl.$setValidity("passwordVerify",false);
                    return undefined;
                }else{
                    ctrl.$setValidity("passwordVerify",true);
                    return viewValue;
                }
            });

        }
    };
});

html：

<input data-ng-model='user.password' type="password" name='password' placeholder='password' required>
<input data-ng-model='user.password_verify' type="password" name='confirm_password' placeholder='confirm password' required data-password-verify="user.password">

给定一个格式的2个密码字段，如果两个密码值相等，则该指令影响的字段有效。问题是它以一种方式起作用（即，当我在密码验证字段中键入密码时）。但是，当原始密码字段更新时，密码验证无效。

知道如何进行“双向绑定验证”吗？

Answer 1

这应该解决它：

视图：

<div ng-controller='Ctrl'>
   <form name='form'>
      <input data-ng-model='user.password' type="password" name='password' placeholder='password' required>
      <div ng-show="form.password.$error.required">
        Field required</div>
      <input ng-model='user.password_verify' type="password" name='confirm_password' placeholder='confirm password' required data-password-verify="user.password">
      <div ng-show="form.confirm_password.$error.required">
        Field required!</div>
      <div ng-show="form.confirm_password.$error.passwordVerify">
        Fields are not equal!</div>
   </form
</div>

指示

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

app.directive("passwordVerify", function() {
   return {
      require: "ngModel",
      scope: {
        passwordVerify: '='
      },
      link: function(scope, element, attrs, ctrl) {
        scope.$watch(function() {
            var combined;

            if (scope.passwordVerify || ctrl.$viewValue) {
               combined = scope.passwordVerify + '_' + ctrl.$viewValue; 
            }                    
            return combined;
        }, function(value) {
            if (value) {
                ctrl.$parsers.unshift(function(viewValue) {
                    var origin = scope.passwordVerify;
                    if (origin !== viewValue) {
                        ctrl.$setValidity("passwordVerify", false);
                        return undefined;
                    } else {
                        ctrl.$setValidity("passwordVerify", true);
                        return viewValue;
                    }
                });
            }
        });
     }
   };
});