formvalidation/src/js/validator/notEmpty.js

The best jQuery plugin to validate form fields. Support Bootstrap, Foundation, Pure, SemanticUI, UIKit and custom frameworks

/**
 * notEmpty validator
 *
 * @link        http://formvalidation.io/validators/notEmpty/
 * @author      https://twitter.com/nghuuphuoc
 * @copyright   (c) 2013 - 2015 Nguyen Huu Phuoc
 * @license     http://formvalidation.io/license/
 */
(function($) {
    FormValidation.I18n = $.extend(true, FormValidation.I18n || {}, {
        'en_US': {
            notEmpty: {
                'default': 'Please enter a value'
            }
        }
    });

    FormValidation.Validator.notEmpty = {
        enableByHtml5: function($field) {
            var required = $field.attr('required') + '';
            return ('required' === required || 'true' === required);
        },

        /**
         * Check if input value is empty or not
         *
         * @param {FormValidation.Base} validator The validator plugin instance
         * @param {jQuery} $field Field element
         * @param {Object} options
         * @returns {Boolean}
         */
        validate: function(validator, $field, options) {
            var type = $field.attr('type');
            if ('radio' === type || 'checkbox' === type) {
                var ns = validator.getNamespace();
                return validator
                            .getFieldElements($field.attr('data-' + ns + '-field'))
                            .filter(':checked')
                            .length > 0;
            }

            if ('number' === type && $field.get(0).validity && $field.get(0).validity.badInput === true) {
                return true;
            }

            var value = validator.getFieldValue($field, 'notEmpty');
            return $.trim(value) !== '';
        }
    };
}(jQuery));