What's the equivalent of Css "display:none" in flex?

I tried this way,but not working:

<mx开发者_JS百科:Box includeInLayout="false" visible="false">

How to achieve the same as display:none?

The only way to completely hide a flex component like display:none is to set the 2 properties together

1. includeInLayout
2. visible

Only the 2 together combined, will result in display:none.

visible=false alone will result in visibility:hidden