Re: [csswg-drafts] [css-borders] [css-ui] Consider rounding (negative?) outline-offsets like border-widths (#12906)

The CSS Working Group just discussed `[css-borders] [css-ui] Consider rounding (negative?) outline-offsets like border-widths`, and agreed to the following:

* `RESOLVED: Round outline-offset same as outline-width and border-width`

<details><summary>The full IRC log of that discussion</summary>
&lt;fantasai> emilio: Fairly common use case to have a negative outline-offset to go over the border.<br>
&lt;fantasai> emilio: given the way things work by default, border gets rounded differently, and outline doesn't cleanly fit<br>
&lt;fantasai> emilio: Feel it should be uncontroversial to round outline-offset the same way as borders<br>
&lt;fantasai> emilio: Firefox has been doing this for awhile to fix high-DPI issues<br>
&lt;fantasai> emilio: I think we should just do it everywhere<br>
&lt;fantasai> +1 from us<br>
&lt;fantasai> florian: I think for awhile we didn't specify outline at all because UI, but not doing this anymore.<br>
&lt;fantasai> astearns: Just outline-offset?<br>
&lt;fantasai> emilio: outline-width is already rounded like border-width<br>
&lt;lwarlow> +1<br>
&lt;fantasai> PROPOSED: Round outline-offset same as outline-width and border-width<br>
&lt;kbabbitt> sgtm<br>
&lt;florian> s/we didn't specify outline at all /we deliberately didn't specify outline much<br>
&lt;fantasai> RESOLVED: Round outline-offset same as outline-width and border-width<br>
&lt;lea> +1<br>
&lt;fantasai> weinig: I will note that there are some open issues wrt rounding, especially regarding zoom<br>
&lt;fantasai> weinig: So if we do this, would be good to get to some of those zoom-related outline and border questions sooner than later<br>
&lt;fantasai> astearns: issues?<br>
&lt;fantasai> weinig: Yeah, I'll post in IRC.<br>
&lt;fantasai> astearns: ok, let's leave space to add those to the logs. But we're done for today.<br>
&lt;fantasai> Meeting closed.<br>
&lt;weinig> its written in terms of border-width, but applies to outline-width and column-rule-width as well, https://github.com/w3c/csswg-drafts/issues/13350<br>
</details>


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Received on Wednesday, 25 February 2026 19:25:26 UTC