From 68213f20bb5d5426f99bafde028ecab601a9d105 Mon Sep 17 00:00:00 2001
From: Richard Gibson <richard.gibson@gmail.com>
Date: Thu, 5 Sep 2013 14:04:11 -0400
Subject: [PATCH] Ref #14313: NaN detection. Close gh-1352. (cherry picked from
 commit 0bc0a69026ce4c1ac570a729d3c975a4a55d0ff4)

---
 src/core.js | 5 ++++-
 src/css.js  | 4 ++--
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/core.js b/src/core.js
index 599caba64..0a8ba3893 100644
--- a/src/core.js
+++ b/src/core.js
@@ -221,7 +221,10 @@ jQuery.extend({
 	},
 
 	isNumeric: function( obj ) {
-		return !isNaN( parseFloat(obj) ) && isFinite( obj );
+		// parseFloat NaNs numeric-cast false positives (null|true|false|"")
+		// ...but misinterprets leading-number strings, particularly hex literals ("0x...")
+		// subtraction forces infinities to NaN
+		return obj - parseFloat( obj ) >= 0;
 	},
 
 	type: function( obj ) {
diff --git a/src/css.js b/src/css.js
index ee6a3935b..883adf1ae 100644
--- a/src/css.js
+++ b/src/css.js
@@ -273,8 +273,8 @@ jQuery.extend({
 				type = "number";
 			}
 
-			// Make sure that NaN and null values aren't set. See: #7116
-			if ( value == null || type === "number" && isNaN( value ) ) {
+			// Make sure that null and NaN values aren't set. See: #7116
+			if ( value == null || value !== value ) {
 				return;
 			}
 
-- 
2.39.5