[Zax]

As the frame:SetMinResize() and frame:SetMaxResize() non longer exist, is there a way to manage a frame live resizing, in order to limit its height for example?

I used to use:

resizeBtn:SetScript("OnMouseDown", function(self, mouse) -- resizeBtn is handler at the bottom of the parentFrame to resize
        if (mouse == "LeftButton" and not parentFrame.isResizing) then
            parentFrame.isResizing = true
            parentFrame:StartSizing("BOTTOM")
        end
    end)

This worked fine in WoW 9.0 if parentFrame:SetMinResize() was added at the frame creation.