functions.php

/**
 * register Som Scripts to the Dom
 * @param $isAdmin
 * @return callable
 */

add_action("wp_enqueue_scripts", function() {
    // Constantin CSS
    wp_register_style(
        "enquiss",
        get_template_directory_uri() . "/style.css",
        '1.0'
    );

    // Register Javascript Files


    if (!$isAdmin)
    {
        // Register jQuery from CDN
        wp_deregister_script('jquery');
        wp_register_script(
            "jquery",
            "http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js",
            array(),
            "1.9.1",
            true
        );
        wp_register_script(
            "app",
            get_template_directory_uri() . "/assets/js/dist/app-enquiss.min.js",
            array("jquery"),
            '1.0',
            true
        );
        // ------------------------
    }
    // Enqueue needed scripts and stylesheets
    if (!$isAdmin)
    {
        wp_enqueue_style("enquiss");
        wp_enqueue_script('app');
    }
});
wp_enqueue_style("enquiss");