Oh, and can you fill in the "adoption" box in chromestatus?

On Fri, May 29, 2026 at 6:11 AM Yoav Weiss (@Shopify) <
[email protected]> wrote:

> LGTM3
>
> On Fri, May 29, 2026 at 5:26 AM Vladimir Levin <[email protected]>
> wrote:
>
>> LGTM2
>>
>> On Thu, May 28, 2026 at 3:27 PM Mike Taylor <[email protected]>
>> wrote:
>>
>>> LGTM1
>>> On 5/28/26 2:27 p.m., 'Alison Maher' via blink-dev wrote:
>>>
>>> >  I'll add some rudimentary ones next week. Broadly speaking it
>>> shouldn't affect our existing fragmentation logic at all. Balancing just
>>> picks different line break-points, so can rely on our existing logic for
>>> wrapping flexboxes. Nothing else further than line-breaking changes.
>>>
>>> Sounds good! Yeah, fwiw, I personally wouldn't consider this one a
>>> blocker. Since we just store the unfragmented offsets, and then adjust them
>>> for fragmentation if needed, this should just work as-is (and just be a
>>> matter of adding basic test coverage and coverage for some of the weird
>>> expansion edge cases that could lead to an unbalanced final result).
>>>
>>> Thanks,
>>> Alison
>>> On Thursday, May 28, 2026 at 11:12:33 AM UTC-7 [email protected]
>>> wrote:
>>>
>>>> Thanks Alison!
>>>>
>>>> On Thu, May 28, 2026 at 11:00 AM 'Alison Maher' via blink-dev <
>>>> [email protected]> wrote:
>>>>
>>>>> Hi Ian,
>>>>>
>>>>> Super excited to see this rolling out!
>>>>>
>>>>> I had a quick question about the missing Web Feature ID. I didn't see
>>>>> a request <https://github.com/web-platform-dx/web-features/issues>
>>>>> filed for it. I suspect it would make sense to assign a temporary ID for
>>>>> this new functionality until it’s more broadly available (separate from 
>>>>> the
>>>>> general flexbox ID)?
>>>>
>>>>
>>>> Filed under https://github.com/web-platform-dx/web-features/issues/4081
>>>>
>>>>
>>>>>
>>>>> Also, re: WPTs, do we have any coverage for 'flex-wrap: balance' in
>>>>> fragmentation scenarios (perhaps in another folder?)
>>>>>
>>>>> Based on how flex fragmentation is implemented, I suspect it should
>>>>> just work out of the box, but some cases that may be interesting to test
>>>>> would be in forced break scenarios where lines can end up expanding. I
>>>>> suspect we don't want to re-run layout in those cases and accept that it
>>>>> may not be fully balanced in the end?
>>>>>
>>>>
>>>> I'll add some rudimentary ones next week. Broadly speaking it shouldn't
>>>> affect our existing fragmentation logic at all. Balancing just picks
>>>> different line break-points, so can rely on our existing logic for wrapping
>>>> flexboxes. Nothing else further than line-breaking changes.
>>>>
>>>>
>>>>> Thanks,
>>>>> Alison
>>>>>
>>>>> On Wednesday, May 27, 2026 at 9:35:39 AM UTC-7 Chromestatus wrote:
>>>>>
>>>>>> *Contact emails*
>>>>>> [email protected]
>>>>>>
>>>>>> *Explainer*
>>>>>> https://github.com/bfgeek/flex-wrap-balance
>>>>>>
>>>>>> *Specification*
>>>>>> https://drafts.csswg.org/css-flexbox-2
>>>>>>
>>>>>> *Summary*
>>>>>> flex-wrap:balance allows developers to distribute content between
>>>>>> flex-lines so that it appears more balanced (similar to 
>>>>>> text-wrap:balance).
>>>>>>
>>>>>> *Blink component*
>>>>>> Blink>Layout>Flexbox
>>>>>> <https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3ELayout%3EFlexbox%22>
>>>>>>
>>>>>> *Web Feature ID*
>>>>>> *No information provided*
>>>>>>
>>>>>> *Motivation*
>>>>>> Without balancing it is trivial to create flex-lines which appear
>>>>>> "unablanced" (lots of whitespace in a particular line). This often makes
>>>>>> developers avoid wrapping flexboxes, instead allowing content to 
>>>>>> overflow.
>>>>>> See explainer.
>>>>>>
>>>>>> *Initial public proposal*
>>>>>> https://github.com/w3c/csswg-drafts/issues/3070
>>>>>>
>>>>>> *TAG review*
>>>>>> https://github.com/w3ctag/design-reviews/issues/1227
>>>>>>
>>>>>> *TAG review status*
>>>>>> Issues addressed
>>>>>>
>>>>>> *Goals for experimentation*
>>>>>> None
>>>>>>
>>>>>> *Risks*
>>>>>>
>>>>>>
>>>>>> *Interoperability and Compatibility*
>>>>>> Interoperability risk: Other browsers do not implement.
>>>>>>
>>>>>> *Gecko*: No signal (
>>>>>> https://github.com/mozilla/standards-positions/issues/1405)
>>>>>>
>>>>>> *WebKit*: No signal (
>>>>>> https://github.com/WebKit/standards-positions/issues/660)
>>>>>>
>>>>>> *Web developers*: Positive (
>>>>>> https://bsky.app/profile/una.im/post/3lpcjcjn4w22r)
>>>>>>
>>>>>> *Other signals*:
>>>>>>
>>>>>> *Activation*
>>>>>> Unlike other CSS features, this may be adopted incrementally by
>>>>>> web-developers as it "gracefully degrades" if not supported. We saw this
>>>>>> previously with `text-wrap:balance` for example.
>>>>>>
>>>>>> *Security*
>>>>>> None.
>>>>>>
>>>>>> *WebView application risks*
>>>>>>
>>>>>> Does this intent deprecate or change behavior of existing APIs, such
>>>>>> that it has potentially high risk for Android WebView-based applications?
>>>>>> *No information provided*
>>>>>>
>>>>>>
>>>>>> *Debuggability*
>>>>>> Small CSS addition.
>>>>>>
>>>>>> *Will this feature be supported on all six Blink platforms (Windows,
>>>>>> Mac, Linux, ChromeOS, Android, and Android WebView)?*
>>>>>> Yes
>>>>>>
>>>>>> *Is this feature fully tested by web-platform-tests
>>>>>> <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>?*
>>>>>> Yes
>>>>>> https://wpt.fyi/results/css/css-flexbox/balance
>>>>>>
>>>>>> *Flag name on about://flags*
>>>>>> experimental-web-platform-features
>>>>>>
>>>>>> *Finch feature name*
>>>>>> FlexWrapBalance
>>>>>>
>>>>>> *Rollout plan*
>>>>>> Will ship enabled for all users
>>>>>>
>>>>>> *Requires code in //chrome?*
>>>>>> False
>>>>>>
>>>>>> *Tracking bug*
>>>>>> https://issues.chromium.org/issues/416755656
>>>>>>
>>>>>> *Measurement*
>>>>>> WebDXFeature::kFlexWrapBalance
>>>>>>
>>>>>> *Estimated milestones*
>>>>>> Shipping on desktop 150
>>>>>> DevTrial on desktop 149
>>>>>> Shipping on Android 150
>>>>>> DevTrial on Android 149
>>>>>> Shipping on WebView 150
>>>>>>
>>>>>> *Anticipated spec changes*
>>>>>>
>>>>>> Open questions about a feature may be a source of future web compat
>>>>>> or interop issues. Please list open issues (e.g. links to known github
>>>>>> issues in the project for the feature specification) whose resolution may
>>>>>> introduce web compat/interop risk (e.g., changing to naming or structure 
>>>>>> of
>>>>>> the API in a non-backward-compatible way).
>>>>>> *No information provided*
>>>>>>
>>>>>> *Link to entry on the Chrome Platform Status*
>>>>>>
>>>>>> https://chromestatus.com/feature/4547107962486784?gate=6499348504117248
>>>>>>
>>>>>> *Links to previous Intent discussions*
>>>>>> Intent to Prototype:
>>>>>> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/67eae2d6.170a0220.8108a.099e.GAE%40google.com
>>>>>>
>>>>>>
>>>>>> This intent message was generated by Chrome Platform Status
>>>>>> <https://chromestatus.com>.
>>>>>>
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>>>>> .
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