我目前有一个Angular Directive，它可以验证密码并确认密码字段是否匹配。它可以工作到一定程度，如果密码不匹配，则确实会引发错误。但是，直到您在两个字段中都输入了数据，它才会引发错误。如何做到这一点，以便在一个字段或另一个字段中输入数据后立即引发密码不匹配的错误？
这是指令（必须将其添加到需要匹配的两个字段中）：
.directive('passwordVerify', function() {
return {
restrict: 'A', // only activate on element attribute
require: '?ngModel', // get a hold of NgModelController
link: function(scope, elem, attrs, ngModel) {
//if (!ngModel) return; // do nothing if no ng-model
// watch own value and re-validate on change
scope.$watch(attrs.ngModel, function() {
validate();
});
// observe the other value and re-validate on change
attrs.$observe('passwordVerify', function(val) {
validate();
});
var validate = function() {
// values
var val1 = ngModel.$viewValue;
var val2 = attrs.passwordVerify;
// set validity
ngModel.$setValidity('passwordVerify', !val1 || !val2 || val1 === val2);
};
}
};
});
这是我形式的指令：
<div class="small-5 columns">
<div class="small-12 columns">
<label>
Password
<input
ng-class="{ notvalid: submitted && add_user_form.user_password.$invalid }"
class="instructor-input"
id="user_password"
type="password"
name='user_password'
placeholder="password"
value=''
required
ng-model="user.user_password"
password-verify="[[user.confirm_password]]"
>
</label>
<p class="help-text">
<span class=" ">Required</span>
</p>
<div
class="help-block"
ng-messages="add_user_form.user_password.$error"
ng-show="add_user_form.user_password.$touched || add_user_form.user_password.$dirty"
>
<span class="red">
<div ng-messages-include="/app/views/messages.html" ></div>
</span>
</div>
</div>
<div class="small-12 columns">
<label>
Confirm Password
<input
ng-class="{ notvalid: submitted && add_user_form.confirm_password.$invalid }"
class="instructor-input"
id="confirm_password"
ng-model="user.confirm_password"
name="confirm_password"
type="password"
placeholder="confirm password"
name="user_confirm_passsword"
required
password-verify="[[user.user_password]]"
>
</label>
<p class="help-text">
<span class=" ">
Enter matching password
</span>
</p>
<div
class="help-block"
ng-messages="add_user_form.confirm_password.$error"
ng-show="add_user_form.confirm_password.$dirty || add_user_form.confirm_password.$touched "
>
<span class="red">
<div
ng-messages-include="/app/views/messages.html"
></div>
</span>
</div>
</div>
只需更改最后的检查：
ngModel.$setValidity('passwordVerify', !val1 || !val2 || val1 === val2);
到：
ngModel.$setValidity('passwordVerify', val1 === val2);
这是一个工作版本：
(function() {
"use strict";
angular
.module('app', ['ngMessages'])
.controller('mainCtrl', mainCtrl)
.directive('passwordVerify', passwordVerify);
function mainCtrl($scope) {
// Some code
}
function passwordVerify() {
return {
restrict: 'A', // only activate on element attribute
require: '?ngModel', // get a hold of NgModelController
link: function(scope, elem, attrs, ngModel) {
if (!ngModel) return; // do nothing if no ng-model
// watch own value and re-validate on change
scope.$watch(attrs.ngModel, function() {
validate();
});
// observe the other value and re-validate on change
attrs.$observe('passwordVerify', function(val) {
validate();
});
var validate = function() {
// values
var val1 = ngModel.$viewValue;
var val2 = attrs.passwordVerify;
// set validity
ngModel.$setValidity('passwordVerify', val1 === val2);
};
}
}
}
})();<html ng-app="app">
<head>
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.5.7/angular.min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.6/css/bootstrap.min.css" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.6/js/bootstrap.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular-messages/1.5.7/angular-messages.min.js"></script>
</head>
<body ng-controller="mainCtrl">
<form name="add_user_form">
<div class="col-md-12">
<div class="form-group" ng-class="{ 'has-error' : add_user_form.user_password.$dirty && add_user_form.user_password.$invalid }">
<p class="help-text">Enter password</p>
<input type="password" class="form-control" id="user_password" name="user_password" placeholder="password" required ng-model="user.user_password" password-verify="{{user.confirm_password}}">
<div class="help-block" ng-messages="add_user_form.user_password.$error" ng-if="add_user_form.user_password.$dirty">
<p ng-message="required">This field is required</p>
<p ng-message="minlength">This field is too short</p>
<p ng-message="maxlength">This field is too long</p>
<p ng-message="required">This field is required</p>
<p ng-message="passwordVerify">No match!</p>
</div>
</div>
<div class="form-group" ng-class="{ 'has-error' : add_user_form.confirm_password.$dirty && add_user_form.confirm_password.$invalid }">
<p class="help-text">Enter matching password</p>
<input class="form-control" id="confirm_password" ng-model="user.confirm_password" name="confirm_password" type="password" placeholder="confirm password" required password-verify="{{user.user_password}}">
<div class="help-block" ng-messages="add_user_form.confirm_password.$error" ng-if="add_user_form.confirm_password.$dirty">
<p ng-message="required">This field is required</p>
<p ng-message="minlength">This field is too short</p>
<p ng-message="maxlength">This field is too long</p>
<p ng-message="required">This field is required</p>
<p ng-message="passwordVerify">No match!</p>
</div>
</div>
</div>
</form>
</body>
</html>希望对您有所帮助。
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