In richfaces, it supports dir = "rtl" in all components, yes, it does not say that you cannot set the dir attribute , but when you put it on, it will not display correctly. To do this, in richfaces you need to redefine its style, replacing it from left to right and left to right, I checked it for simple components, but for others, such as a tree, such as a menu, it will not be as simple as I say. I have no idea which other components will support this.
By the way, I speak for 3.1.5. GA.
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