Issue #2849246 by catch, jp.stacey:...

Issue #2849246 by catch, jp.stacey: HtmlResponseAttachmentsProcessor::processAttachments should reference processing placeholders (cherry picked from commit 6cfdef1a)

Issue #2849246 by catch, jp.stacey:...
cb0096a7 · Dave Long · 040893f9 · cb0096a7
Verified Commit cb0096a7 authored 2 years ago by Dave Long
--- a/core/lib/Drupal/Core/Render/AttachmentsResponseProcessorInterface.php
+++ b/core/lib/Drupal/Core/Render/AttachmentsResponseProcessorInterface.php
@@ -38,6 +38,10 @@ interface AttachmentsResponseProcessorInterface {
   * - 'html_head_link' (<link> tags in HTML <head>)
   * - 'http_header' (HTTP headers and status code)
   *
+   * Placeholders need to be rendered first in order to have all attachments
+   * available for processing. For an example, see
+   * \Drupal\Core\Render\HtmlResponseAttachmentsProcessor::renderPlaceholders()
+   *
   * @param \Drupal\Core\Render\AttachmentsInterface $response
   *   The response to process.
   *