AngularJS provides you built-in validation directives to validate form client side. This makes your life pretty
easy to handle client-side form validations without adding a lot of extra effort. AngularJS form validations are
based on the HTML5 form validators.
AngularJS directives for form validation
Here is a list of AngularJS directive which can be applied on an input field to validate its value
<input type="text"
ng-model="{ string }"
[name="{ string }"]
[ng-required="{ boolean }"]
[ng-minlength="{ number }"]
[ng-maxlength="{ number }"]
[ng-pattern="{ string }"]
[ng-change="{ string }"]>
</input>
