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change background picture primarily based on present node?

I’m attempting to vary Drupal Development header background picture of my web site primarily based on Drupal Development present node. I’ve added a picture discipline to my content material sort, field_hero_image, and, in preprocess operate mytheme_preprocess_page(&$variables), I get Drupal Development picture url and attempt to inject it in Drupal Development web page, as inline css:

operate mytheme_preprocess_page(&$variables) {      $node = $variables['node'];     if ($node) {            $path = file_create_url($node->field_hero_image->entity->getFileUri());             $variables['page']['#attached']['css'] = array(                 'information' => '.header-wrapper { background:url(' . $path . ') heart heart no-repeat !vital; background-size: cowl;}',                 'sort' => 'inline',             );     } }

or

operate mytheme_preprocess_page(&$variables) {      $node = $variables['node'];     if ($node) {            $path = file_create_url($node->field_hero_image->entity->getFileUri());            $variables['#attached']['library'][] = array(             'information' => '.header-wrapper { background:url(' . $path . ') heart heart no-repeat !vital; background-size: cowl;}',             'sort' => 'inline',         );     } }

None of this works.

Is there a strategy to inject css from Drupal Development preprocess operate? I do know that I can get Drupal Development path worth, put it in $variables and use it in twig. However this does not appear a clear answer to me.

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change background picture primarily based on present node?

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