How do you remove the border of a Flex 4 TextArea Component (spark themed halo)

Question

With the Flex 3 SDK you simply needed to set the borderThickness style to 0, or set borderStyle to none. With the Flex 4 SDK ad the Spark theme, this has no affect.

Answer 1

I haven't dabbled in Flash Builder 4 yet, but I know in Flex 3 you can modify things like this (when its not possible another way):

var tb:TextInput = new TextInput();
tb.getChildAt(0).setStyle(...);

Might want to give this a try, you just need to find the correct child element usually.

EDIT: Here's your answer

Answer 2

You have to set the borderSkin to null

<mx:TextArea borderSkin={null} />

Answer 3

borderVisible="false"