如何根据一定的标准在angularjs中使用正则表达式添加密码验证？ [英] How to add password validation using regular expression in angularjs according to certain criterion?

问题描述

我想验证用户输入的密码是否符合以下条件：

I want to validate password entered by user for following criteria :

密码长度至少应为8个字符，并且应包含一个数字，一个字符和一个特殊字符。

为此，我使用了以下正则表达式：

For it I used following regular expression :

^(?=.*[A-Za-z])(?=.*\d)(?=.*[$@$!%*#?&])[A-Za-z\d$@$!%*#?&]{8,}$

我在我的angularjs代码中尝试了这个表达式，如下所示：

I tried this expression in my angularjs code as below :

<md-input-container class="md-block" style="margin-top:0px;">
            <label>Password</label> <md-icon
                md-svg-src="/images/icons/ic_lock_black_24px.svg" class="name"></md-icon>
            <input type="password" ng-model="newUser.userPassword"
                name="userPassword" required 
                ng-pattern="^(?=.*[A-Za-z])(?=.*\d)(?=.*[$@$!%*#?&])[A-Za-z\d$@$!%*#?&]{8,}$">
            <div
                ng-messages="registerForm.userPassword.$error">
                <div ng-message="pattern">Password should be atleast 8 characters long
                    and should contain one number,one character and one special
                    character</div>
                <div ng-message="required">Password should be atleast 8 characters
                    long and should contain one number,one character and one special
                    character</div>
            </div>
            </md-input-container>

在上面的代码中，当密码字段为空并且焦点丢失时，会显示错误消息。如果用户输入的密码不符合我提到的标准，则不会显示错误消息。

In my above code the error message displays when the password field is blank and focus is lost. If user enters a password which doesn't satisfy the criteria I mentioned the error message doesn't show up.

我该如何解决此问题？有人请帮助我。

How should I fix this issue? Somebody please help me.

推荐答案

据我了解你的问题。检查你的控制台它可能因词汇错误而中断。

As far as i understood your problem. Check your console It might be broken on lexical errors.

你在开始和结束时忘了斜杠图案。
请使用 ng-pattern =/ ^（？=。* [A-Za-z]）（？=。* \ d）（？=。* [$ @ $ ！％*＃？&]）[A-Za-z\d $ @ $！％*＃？&] {8，} $ /

You forgot slash at start and at end of ng-pattern. Please use ng-pattern="/^(?=.*[A-Za-z])(?=.*\d)(?=.*[$@$!%*#?&])[A-Za-z\d$@$!%*#?&]{8,}$/"

我创建了一个可能对你有用的插件。
https://plnkr.co/edit/qCjp6a?p=preview

I have created a plunk which might help you. https://plnkr.co/edit/qCjp6a?p=preview

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