Animate border-width

[Futjikato]

Animating borderWidth only works when the style is declared as inlinestyle. I skeched the problem at jsFiddle.net (  http://jsfiddle.net/TkQM5/ ).

[dmethvin]

The borderWidth property is a shorthand property and returns a string that is a series of numbers separated by spaces. The .animate() method is only documented to animate properties that are numeric, such as borderLeftWidth.

[sebastian@…]

Replying to dmethvin:

The borderWidth property is a shorthand property and returns a string that is a series of numbers separated by spaces. The .animate() method is only documented to animate properties that are numeric, such as borderLeftWidth.

The first example is incorrect, it tries to animate a "borderWidth" property:  http://api.jquery.com/animate/#example-0

And it could look like working when the border is increasing because the value returned by $().css("borderWidth") is the empty string (""), so it animates from 0 (equal to "") to the value set in the options of the .animate() method.