How to Handle Confirm Password Validation in Angular Forms

Описание: Learn to create a robust password confirmation form in Angular, ensuring that the new password and confirm password fields match with proper validation techniques.
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This video is based on the question https://stackoverflow.com/q/65193199/ asked by the user 'Soccerplayer97' ( https://stackoverflow.com/u/12587675/ ) and on the answer https://stackoverflow.com/a/65203345/ provided by the user 'Soccerplayer97' ( https://stackoverflow.com/u/12587675/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Building a Password Confirmation Form in Angular

Creating a password confirmation form in Angular that validates user input correctly can be challenging for many developers, especially when it comes to matching the new password and confirm password fields. This guide will guide you through implementing a reliable password confirmation logic using Angular's reactive forms.

The Problem

Imagine you’re developing a form that requires users to enter their old password, a new password, and then confirm that new password. It's vital for user experience and security that the user is informed if their new password does not match the confirmation field.

In this situation, a common issue arises if the validation does not trigger the errors properly, particularly for the confirm password field. As a result, users might not receive feedback, leading to confusion. Let's take a closer look at the code and identify where things might go wrong.

Core Code Structure

Let's break down the HTML template, the custom validator, and the component class to understand better how the form should be structured:

Template Code

Here's a simplified version of the form you would implement:

[[See Video to Reveal this Text or Code Snippet]]

Custom Validator Logic

Next, ensure your custom validation logic correctly compares the new password and confirm password:

[[See Video to Reveal this Text or Code Snippet]]

Component Class

Finally, integrate this form logic in your Angular component:

[[See Video to Reveal this Text or Code Snippet]]

Solving the Issue

In the original implementation, upon entering a value in the Confirm Password field, the existing logic for displaying error messages was not maintaining state properly:

Ensure that your validator checks specific field values and returns null instead of an object when values match.

The changes in the template, such as checking form.errors?.confirmNewPassword with an additional conditional, will help in throwing relevant errors indicating passwords mismatching.

Conclusion

By following this structured approach and ensuring that your Angular forms are set up correctly, you’ll provide better feedback for users regarding their password inputs. Keeping users informed through error messages and validations enhances their experience and promotes better security practices.

Taking the time to handle validations properly will save time in the long run by reducing user frustration and fostering trust in your application. Remember, a user-friendly form is a key component in application design!