Bootstrap 3 + Validation Plugin

by sunil puvvada

HTML

<script src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.11.1/jquery.validate.min.js"></script>
<link rel="stylesheet" href="http://getbootstrap.com/dist/css/bootstrap.css">
<script src="http://cdn.jsdelivr.net/jquery.validation/1.13.1/additional-methods.js"></script>
<form id="form" enctype="multipart/form-data">
    <div class="form-group">
        <label class="control-label" for="firstname">First:</label>
        <div class="input-group">
            <input class="form-control"  name="firstname" type="text" />
        </div>
    </div>
        
    <div class="form-group">
        <label class="control-label" for="lastname">Last:</label>
        <div class="input-group">
            <input class="form-control" name="lastname" type="text" />
        </div>
    </div>
    
        <div class="form-group">
        <label class="control-label" for="file">Image:</label>
        <div class="input-group">
            <input  id="file" name="file" type="file" />
        </div>
    </div>
    
    
        <button type="submit" class="btn btn-primary">Submit</button>
</form>

CSS

body {
    padding: 20px;
}

JavaScript

$.validator.addMethod('filesize', function(value, element, param) {
   return this.optional(element) || (element.files[0].size <= param) 
});    

$('#form').validate({
        rules: {
            firstname: {
                minlength: 6,
                required: true
            },
            lastname: {
                minlength: 6,
                required: true
            },
            file: {
                required: true, 
                extension: "png|jpeg|jpg",
                filesize: 1048576,   
            }
        },
        messages: 
           { 
            file: "File must be JPEG or PNG, less than 1MB" 
           },
        highlight: function(element) {
            $(element).closest('.form-group').addClass('has-error');
        },
        unhighlight: function(element) {
            $(element).closest('.form-group').removeClass('has-error');
        },
        errorElement: 'span',
        errorClass: 'help-block',
        errorPlacement: function(error, element) {
            if(element.parent('.input-group').length) {
                error.insertAfter(element.parent());
            } else {
                error.insertAfter(element);
            }
        }
    });