Enqueue JS only where shortcode is used

I patched the Loader.php file has:

public static function activate_frontend_scripts() : void {
        global $post;

		if ( \is_a( $post, 'WP_Post' ) && \has_shortcode( $post->post_content, 'mail_encrypt' ) ) {
            wp_enqueue_script(
                'mail_encrypt.js',
                self::$base . 'dist/js/mail-encrypt-frontend.js',
                [],
                null,
                true
            );
        }
    }

‘