Simplify validation error handling in Angular with `ng-input-validation`

Joseph Donovan BIBANG BEFENE — Thu, 06 Nov 2025 10:44:43 +0000

💬 Introduction

In Angular, displaying validation errors in a form can quickly become repetitive and verbose. It is to simplify this part that I have developed a small library: ng-input-validation, which centralizes and automates the display of error messages in an elegant and reusable way.

In this post, I show you how I used to do it and how I do it today 👇

❌ Before: a repetitive management in each field

Before, for each form field, it was necessary to write several conditions to display the error messages:

👉 Result: a lot of repetitive code to maintain, especially when you have multiple fields.

✅ Now: a single line thanks to `ng-input-validation`

With ng-input-validation, everything is managed automatically from the FormControl.
Here is what the same field looks like today:

And your FormGroup :

Where before it was necessary to write several @if, today a single line is enough. The component automatically displays the correct error message according to the type of validation (required, email, minLength, etc.).

⚙️ Bonus:

You can also manage backend errors or add custom messages for each type of error.

📦 Installation

npm i ng-input-validation

And don’t forget to import it into the Angular component.

💡 Conclusion

This library allowed me to:

Save time on form management;
Keep a cleaner and maintainable code;
Standardize error messages in all my Angular applications.

👉 The project is open-source on npm:
🔗 https://www.npmjs.com/package/ng-input-validation

Hello Dev Community 👋 – Mes débuts sur Dev.to

Joseph Donovan BIBANG BEFENE — Wed, 05 Nov 2025 21:19:50 +0000

👋 Salut la communauté !

Je m'appelle Joseph, développeur web passionné par tout ce qui touche à l’écosystème JavaScript — et plus particulièrement à Angular 💪

Je rejoins Dev.to avec l’envie de partager des articles sur le développement web, des astuces, des bonnes pratiques, ainsi que mes travaux et recherches autour d’Angular, TypeScript et des architectures modernes.

Mon objectif est simple : apprendre, échanger et grandir ensemble grâce au partage de connaissances. 🚀

Au plaisir d’échanger avec vous dans les commentaires et de découvrir vos publications !

webdev #angular #javascript #typescript #frontend #bestpractices

DEV Community: Joseph Donovan BIBANG BEFENE