Re: [csswg-drafts] [css-break] Fragmented out-of-flow contained by box with cloned borders (#10553)

Since last time, I've added support for cloned box decorations to Chromium, and, just like Gecko, Chromium lets OOFs overlap with cloned borders.

Screenshot from Firefox (which renders identically in Chromium), example in the original post:
<img width="532" height="112" alt="Image" src="https://github.com/user-attachments/assets/9b237448-3d51-4180-9235-33c36886a7ea" />

Is this preferred behavior, and should it be clarified in the spec?

WebKit doesn't support cloned box decorations, at least not at block axis edges.

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Received on Wednesday, 25 March 2026 08:06:22 UTC