From 16c563b8966ad05c8c67450865cd26d7aa0436f5 Mon Sep 17 00:00:00 2001
From: Allan Jardine <allan@datatables.net>
Date: Wed, 18 Sep 2024 08:48:19 +0000
Subject: [PATCH] Fix: Dropup wasn't working when in an offset parent with a
 low position top

https://datatables.net/forums/discussion/79861
---
 js/dataTables.buttons.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/js/dataTables.buttons.js b/js/dataTables.buttons.js
index fdddf77f..b02bb2b7 100644
--- a/js/dataTables.buttons.js
+++ b/js/dataTables.buttons.js
@@ -1487,7 +1487,7 @@ $.extend(Buttons.prototype, {
 					popoverSizes.marginBottom;
 			}
 
-			if (containerPosition.top + top < $(window).scrollTop()) {
+			if (offsetParent.offset().top + top < $(window).scrollTop()) {
 				// Correction for when the top is beyond the top of the page
 				top = buttonPosition.top + hostNode.outerHeight();
 			}