From 8fb72ffcaf33f16d76004b108d8d8055988d41eb Mon Sep 17 00:00:00 2001
From: evazion <noizave@gmail.com>
Date: Fri, 20 Apr 2018 21:26:06 -0500
Subject: [PATCH] Fix #3660: Resize-to-fit broken for previews on upload page.

---
 app/assets/javascripts/posts.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/app/assets/javascripts/posts.js b/app/assets/javascripts/posts.js
index 1485e1626..5e9c2ab43 100644
--- a/app/assets/javascripts/posts.js
+++ b/app/assets/javascripts/posts.js
@@ -398,7 +398,8 @@
   Danbooru.Post.resize_image_to_window = function($img) {
     if (($img.data("scale-factor") === 1) || ($img.data("scale-factor") === undefined)) {
       if ($(window).width() > 660) {
-        var client_width = $(window).width() - $("#sidebar").width() - 75;
+        var sidebar_width = $("#sidebar").width() || 0;
+        var client_width = $(window).width() - sidebar_width - 75;
       } else {
         var client_width = $(window).width() - 2;
       }