jQuery Validator: Basic Example

HTML

<script src="//ajax.aspnetcdn.com/ajax/jquery.validate/1.12.0/jquery.validate.min.js"></script>
<form class="validation-form">
    <lable>User1</lable>
    
    <input type="text" name="user[]" required /><br>
    <lable>User2</lable>
    <input type="text" name="user[]" required /><br>
    <button class="submit-form">submit</button>
</form>

JavaScript

$('form.validation-form').validate();