WordPress enqueue scripts with mobile detect.

gistfile1.php

<?php
add_action('wp_enqueue_scripts', function() {
    if ( ! is_admin()) {

        // Get rid of the default jQuery
        wp_deregister_script('jquery');

        // For non-mobile devices
        if ( ! $wp_is_mobile()) {
            wp_register_script('jquery-js', JS_PUBLIC_URI . 'vendor/jquery/jquery.min.js', array(), '', false);
            wp_register_script('modernizr', JS_PUBLIC_URI . 'vendor/modernizr/modernizr.min.js', array(), '', false);
            wp_register_script('main-js', JS_PUBLIC_URI . 'main.js', array('jquery-js'), '', true);
            wp_register_style('stylesheet', get_stylesheet_directory_uri() . '/style.css', array(), '', 'all');

            if ($is_IE) {
                wp_register_script('html5shiv', 'http://html5shiv.googlecode.com/svn/trunk/html5.js' , false, true);
                wp_enqueue_script('html5shiv');
            }

            wp_enqueue_style('stylesheet');
            wp_enqueue_script('jquery-js');
            wp_enqueue_script('modernizr');
            wp_enqueue_script('main-js');
        } else if ($wp_is_mobile()) {
            wp_register_script('jquery-js', JS_PUBLIC_URI . 'vendor/jquery/jquery.min.js', array(), '', false);
            wp_register_script('mobile-js', JS_PUBLIC_URI . 'mobile.js', array('jquery-js'), '', true);
            wp_register_style('stylesheet', get_stylesheet_directory_uri() . '/style.css', array(), '', 'all');

            wp_enqueue_style('stylesheet');
            wp_enqueue_script('jquery-js');
            wp_enqueue_script('mobile-js');
        }
    }
});