From c078b83b3fea891e0c228a9f2d101481678b4c9d Mon Sep 17 00:00:00 2001
From: Mike Sherov <mike.sherov@gmail.com>
Date: Sat, 25 Aug 2012 11:26:37 -0400
Subject: Fix #12313, .height()/.width() just use CSS if no offsetWidth. Close
 gh-909.

---
 src/css.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'src/css.js')

diff --git a/src/css.js b/src/css.js
index 3d7565020..5144ee9ca 100644
--- a/src/css.js
+++ b/src/css.js
@@ -411,7 +411,10 @@ function getWidthOrHeight( elem, name, extra ) {
 		valueIsBorderBox = true,
 		isBorderBox = jQuery.support.boxSizing && jQuery.css( elem, "boxSizing" ) === "border-box";
 
-	if ( val <= 0 ) {
+	// some non-html elements return undefined for offsetWidth, so check for null/undefined
+	// svg - https://bugzilla.mozilla.org/show_bug.cgi?id=649285
+	// MathML - https://bugzilla.mozilla.org/show_bug.cgi?id=491668
+	if ( val <= 0 || val == null ) {
 		// Fall back to computed then uncomputed css if necessary
 		val = curCSS( elem, name );
 		if ( val < 0 || val == null ) {
-- 
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