I have often seen entry level developers struggling with user input validation in AngularJS single page applications. In this post, I will give a quick but useful introduction of validations in AngularJS; consider this post as a base learning document from which you can do further learning.

Let’s start with an example as shown in the image below. You have a registration form with three fields with the following restrictions.

1. Name : Required
2. Email : Required and type Email
3. Password : Required , type password and minimum length 6

We want to validate the rules mentioned above at the client side. There are two ways client side validation can be done in an AngularJS based single page application:

1. Using the HTML5 validations
2. Using the AngularJS validation directives
3. A Combination of both

HTML5 validation

Here we’ve created the Add user form shown above using the mark up listed below:

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