Copy width (and max-width)?

[ap]

I use these properties on some of my textareas where the content may get far too wide to fit reasonably on the page, so I want those textareas to expand only vertically but use a scrollbar for horizontally overlong content.

I’ve been handling that by patching the library to copy these properties because I’ve always assumed there is a reason it doesn’t do that out of the box. Am I mistaken? Is this a change I could upstream?