--- /dev/null
+<?php
+
+/**
+ * @file
+ * Functions to support theming in the Stable theme.
+ */
+
+use Drupal\Component\Utility\Html;
+
+/**
+ * Implements template_preprocess_links().
+ */
+function stable_preprocess_links(&$variables) {
+ // @deprecated in Drupal 8.0.x and will be removed before 9.0.0. This feature
+ // of adding a class based on the associative key can cause CSS class name
+ // conflicts.
+ if (!empty($variables['links'])) {
+ foreach ($variables['links'] as $key => $value) {
+ if (!is_numeric($key)) {
+ $class = Html::getClass($key);
+ $variables['links'][$key]['attributes']->addClass($class);
+ }
+ }
+ }
+}