Re: [csswg-drafts] Define possibly inheritable behaviour for `app-region` (now `window-drag`) (#13101)

Hola @kyerebo! When we looked into this change we considered this exact case you mention. I think making this inheritable wouldn't change the current behaviour of how the feature behaves when active. Right now, when you enable WCO and add the `app-region` property to a `div` that will be positioned in the "titlebar" area every single element inside this `div` must opt-out if they're not intended to be 'draggable'.

The cases we looked at that are using the WCO API wouldn't break, as by only putting their parent container to `app-region: drag` the _whole of the container and it's contents already become draggable_. 

I might be mistaken, but from the way I've used the WCO API throughout the years the breakage you mention does not happen. Happy to be pointed out to a demo that points out the breakage you mention and we can discuss more. 

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Received on Thursday, 12 March 2026 09:16:14 UTC