Re: [csswg-drafts] Give authors the ability to style form validation messages (#7172)

I like Luke's idea and agree with Emilio's comment.

I think that using appearance:base to opt into a popover picker instead of a "native" browser one could address concerns about existing validation bubbles crossing boundaries like coming out of an iframe.

I didn't end up shipping my change to make all validation bubbles popovers due to lack of tether support (not sure what the current state of that is), and because I couldn't find a spot in the document to append a popover element for form-associated custom elements (for others like `<input>`, I put it in their user-agent shadowroot).

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Received on Monday, 7 July 2025 23:44:51 UTC