attr("any",undefined) returns undefined

[fergusg]

Example (in Chrome debugger):

jQuery("<a>").attr("href",undefined).css("a","b");
TypeError: Cannot call method 'css' of undefined

I would expect the same behaviour as attr("...",null), which returns the jQuery object.

[fergusg]

See: ​http://jsfiddle.net/2CPXk/ (that's only up to jQuery 1.5.1, but the same problem)

[timmywil]

Thanks for taking the time to contribute to the jQuery project! Passing undefined to attr is treated the same as not passing any value at all, thus treated as a getter. Use ​http://api.jquery.com/removeAttr to remove attributes.