From 1a97a84023febdb111c4c6fe3a42216068635d7b Mon Sep 17 00:00:00 2001
From: Giteabot <teabot@gitea.io>
Date: Sat, 18 Mar 2023 17:48:13 -0400
Subject: [PATCH] Fix JS error on compare page (#23551) (#23566)

Backport #23551 by @silverwind

Fix regression from https://github.com/go-gitea/gitea/pull/23271. This
code apparently runs on the compare page where there is no review button
so check for existance of both button and content.

<img width="1226" alt="Screenshot 2023-03-17 at 21 42 47"
src="https://user-images.githubusercontent.com/115237/226040001-ec097edd-d926-4c80-9962-526f9b7eff19.png">

Fixes #23562

Co-authored-by: silverwind <me@silverwind.io>
---
 web_src/js/features/repo-issue.js | 28 +++++++++++++++-------------
 1 file changed, 15 insertions(+), 13 deletions(-)

diff --git a/web_src/js/features/repo-issue.js b/web_src/js/features/repo-issue.js
index a110b82c5c66..52f777b6a00c 100644
--- a/web_src/js/features/repo-issue.js
+++ b/web_src/js/features/repo-issue.js
@@ -515,20 +515,22 @@ export function initRepoPullRequestReview() {
   const $panel = $reviewBtn.parent().find('.review-box-panel');
   const $closeBtn = $panel.find('.close');
 
-  const tippy = createTippy($reviewBtn[0], {
-    content: $panel[0],
-    placement: 'bottom',
-    trigger: 'click',
-    role: 'menu',
-    maxWidth: 'none',
-    interactive: true,
-    hideOnClick: true,
-  });
+  if ($reviewBtn.length && $panel.length) {
+    const tippy = createTippy($reviewBtn[0], {
+      content: $panel[0],
+      placement: 'bottom',
+      trigger: 'click',
+      role: 'menu',
+      maxWidth: 'none',
+      interactive: true,
+      hideOnClick: true,
+    });
 
-  $closeBtn.on('click', (e) => {
-    e.preventDefault();
-    tippy.hide();
-  });
+    $closeBtn.on('click', (e) => {
+      e.preventDefault();
+      tippy.hide();
+    });
+  }
 
   $(document).on('click', 'a.add-code-comment', async function (e) {
     if ($(e.target).hasClass('btn-add-single')) return; // https://github.com/go-gitea/gitea/issues/4745