From b1e66a5faaf46ffcbcc27c79a9a224aaf851a987 Mon Sep 17 00:00:00 2001
From: Michał Gołębiowski-Owczarek <m.goleb@gmail.com>
Date: Tue, 7 Nov 2023 00:35:52 +0100
Subject: CSS: Fix reliableTrDimensions support test for initially hidden
 iframes

Closes gh-5358
Ref gh-5317
Ref gh-5359
---
 src/css/support.js | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'src')

diff --git a/src/css/support.js b/src/css/support.js
index 5f9b37d7f..c7229e93a 100644
--- a/src/css/support.js
+++ b/src/css/support.js
@@ -47,6 +47,12 @@ support.reliableTrDimensions = function() {
 			.appendChild( tr )
 			.appendChild( div );
 
+		// Don't run until window is visible
+		if ( table.offsetWidth === 0 ) {
+			documentElement.removeChild( table );
+			return;
+		}
+
 		trStyle = window.getComputedStyle( tr );
 		reliableTrDimensionsVal = ( parseInt( trStyle.height, 10 ) +
 				parseInt( trStyle.borderTopWidth, 10 ) +
-- 
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