wp_register_script( \'custom-js\', \'https://s3.amazonaws.com/codexo/custom.js\', array( \'jquery\' ), \'1.1\', true );
        wp_enqueue_script( \'custom-js\' );

以上是function 我试图通过它将外部javascript排队，但这不起作用。我哪里出了问题？我该如何解决这个问题？

此处为完整代码：

if ( ! function_exists( \'function_script\' ) ) {

function function_script() {
        // Register the script like this for a theme:
        wp_register_script( \'custom-js\', \'https://s3.amazonaws.com/codexo/custom.js\', array( \'jquery\' ), \'1.1\', true );
        wp_enqueue_script( \'custom-js\' );


        wp_enqueue_style( \'styles\', THEMEROOT . \'/style.css\' );
        // wp_enqueue_style( \'style\', get_template_directory_uri() . \'/style.css\' );
        // wp_enqueue_style( \'responsive\', THEMEROOT . \'/css/responsive.css\', array(\'styles\'));
    }
}
add_action(\'wp_enqueue_scripts\',\'function_script\'); 

(function( $ ) {

    // --- your code ---
    $(document).ready(function() {
       //...
    });

})(jQuery);

jQuery(document).ready(function($) {

    // code from file whithout line "$(document).ready(function(){"
    //...

});