rssreader-1.0.0/rssreadandprint.module

<?php


use Drupal\Core\Routing\RouteMatchInterface;

function rssreadandprint_page_attachments(array &$attachments) {
    if (!\Drupal::service('router.admin_context')->isAdminRoute()) {
        $attachments['#attached']['library'][] = 'rssreadandprint/rssreadandprint-library';
    }
}