Implement CSS `display: flow-root` (modern clearfix)

External Issue #10152756


Marat T.
Dec 10, 2016
This issue is public.
Reported by 1 person

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Steps to reproduce

display: flow-root is a modern way to force a block to be a formatting context that floated elements are contained in (aka clearfix).

From the spec [1]:

The element generates a block container box, and lays out its contents using flow layout. It always establishes a new block formatting context for its contents.

Tab Atkins and Elika Etemad (fantasai) from CSSWG consider the feature stable enough to be implemented [2].



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    Comments and activity

    • Microsoft Edge Team

      Changed Assigned To to “Brad E.”

      Changed Status to “By design”

    • Feature requests should go to UserVoice, this website is for bugs only. Resolving as By Design since not supporting the feature is what our current design is supposed to do (that doesn’t mean we think the feature shouldn’t be supported but that this is not a bug).

    • Hello, Francois. Please clarify what is UserVoice and provide a link. Thanks.

    • Looks like it’s

      So here is the feature request:

      The impressive thing is that when trying to post the “idea” via Firefox, UserVoice was consistently saying “Sorry, we couldn’t submit your request.” to me, then I’ve tried to enable all JS and referrer one by one, but the result was still the same. So I’ve ended up with opening IE11 where the very first attempt was successfull, but in fact, there were 4 copies (!) of it as a result (looks like the first attempts via Firefox were in fact successfull, and the error message was false). Fortunately, I was able to delete the extra copies. Needless to say, there were no issues at all with posting similar feature requests in bug trackers of Firefox, Chromium, and WebKit.

    • Microsoft Edge Team

      Changed Status from “By design” to “External”

    • Sorry to hear about your difficulties posting the suggestion. We do not own Uservoice, we just rely on their platform. I would recommend sending your problems to them so they can investigate the issue.


      I came to this issue to change the status from “By Design” to “Duplicate” and link this to our internal tracker for the feature. You will probably receive an update as that happens, but that doesn’t change our status in anyway, this is just for proper book-keeping purposes.

    • This issue has been resolved External. This means this issue may require a new feature to be implemented or other work that is more significant than a typical bug. You may be able to find more information on this issue by searching for related features on and

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