Issue #3071209 by bnjmnm, alonaoneill, Willtg, zrpnr: Hook Help is missing

jquery_ui_slider.module

+<?php
+
+/**
+ * @file
+ * Contains jquery_ui_slider.module.
+ */
+
+use Drupal\Core\Routing\RouteMatchInterface;
+
+/**
+ * Implements hook_help().
+ */
+function jquery_ui_slider_help($route_name, RouteMatchInterface $route_match) {
+  switch ($route_name) {
+    case 'help.page.jquery_ui_slider':
+      $output = '<h3>' . t('About') . '</h3>';
+      $output .= '<p>' . t('Drupal 8 includes jQuery UI in core, however it is no longer actively maintained and has been marked deprecated. This module provides the jQuery UI Slider library for any themes and modules that require it.') . '</p>';
+      $output .= '<p>' . t('For more information about the deprecation of jQuery UI, see this <a href=":change-record">change record</a>', [':change-record' => 'https://www.drupal.org/node/3067969']) . '</p>';
+      $output .= '<p>' . t('Visit the <a href=":project_link">jQuery UI Slider project page</a> on Drupal.org for more information on this module.', [':project_link' => 'https://www.drupal.org/project/jquery_ui_slider']) . '</p>';
+
+      return $output;
+  }
+}