Core: deprecate jQuery.isNumeric

Fixes gh-2960
Closes gh-3888

1 files changed, 14 insertions, 0 deletions

diff --git a/src/deprecated.js b/src/deprecated.js
index 0982f3a94..f1b7db7c6 100644
--- a/src/deprecated.js
+++ b/src/deprecated.js
@@ -79,4 +79,18 @@ jQuery.camelCase = camelCase;
 
 jQuery.now = Date.now;
 
+jQuery.isNumeric = function( obj ) {
+
+	// As of jQuery 3.0, isNumeric is limited to
+	// strings and numbers (primitives or objects)
+	// that can be coerced to finite numbers (gh-2662)
+	var type = jQuery.type( obj );
+	return ( type === "number" || type === "string" ) &&
+
+		// parseFloat NaNs numeric-cast false positives ("")
+		// ...but misinterprets leading-number strings, particularly hex literals ("0x...")
+		// subtraction forces infinities to NaN
+		!isNaN( obj - parseFloat( obj ) );
+};
+
 } );