Make .val(undefined) == .val("") and chainable; fixes #4130.

[jquery.git] / src / attributes.js

diff --git a/src/attributes.js b/src/attributes.js
index a76695b..fd3e38a 100644 (file)
--- a/src/attributes.js
+++ b/src/attributes.js
@@ -136,7 +136,7 @@ jQuery.fn.extend({
        },
 
        val: function( value ) {
-               if ( value === undefined ) {
+               if ( !arguments.length ) {
                        var elem = this[0];
 
                        if ( elem ) {
@@ -209,9 +209,10 @@ jQuery.fn.extend({
                                val = value.call(this, i, self.val());
                        }
 
-                       // Typecast each time if the value is a Function and the appended
-                       // value is therefore different each time.
-                       if ( typeof val === "number" ) {
+                       // Treat null/undefined as ""; convert numbers to string
+                       if ( val == null ) {
+                               val = "";
+                       } else if ( typeof val === "number" ) {
                                val += "";
                        }