In this tuto, I'll show you how to attach a library to page(s) in Drupal 8.
Attach a library in a preprocess function
Example 1: add a library to node.
/**
* @param $variables
*/
function THEMENAME_preprocess_node(&$variables)
{
// check we have a node object.
if ($node = \Drupal::routeMatch()->getParameter('node')) {
if ($node->id() == 237) {
//attach the library.
$variables['#attached']['library'][] = 'your_theme/library_name';
}
}
}
Example 1: add a library to maintenance page.
/**
* @param $variables
*/
function yourmodule_preprocess_maintenance_page(&$variables) {
$variables['#attached']['library'][] = 'your_module/library_name';
}
Example 2: attach library to specific page.
/**
* @param $variables
*/
function THEMENAME_preprocess_page(&$variables) {
if (\Drupal::routeMatch()->getRouteName() == 'view.frontpage.page_1') {
$variables['#attached']['library'][] = 'THEMENAME/home-lib';
}
$node = \Drupal::routeMatch()->getParameter('node');
if ($node instanceof \Drupal\node\NodeInterface) {
if($node->getType() == 'article') {
$variables['#attached']['library'][] = 'THEMENAME/news-lib';
}
}
}
