On Wed, Feb 26, 2025 at 11:32 AM Chris Harrelson <chris...@chromium.org>
wrote:

>
>
> On Tue, Feb 25, 2025 at 11:16 PM Domenic Denicola <dome...@chromium.org>
> wrote:
>
>> Hi all,
>>
>> I randomly discovered today that we forgot to remove one property as part
>> of this deprecation and removal. We successfully removed NavigateEvent's
>> transitionWhile() (replaced with intercept()), but did not remove the
>> property canTransition (replaced with canIntercept).
>>
>> The percentage of page loads using the navigation API
>> <https://chromestatus.com/metrics/feature/timeline/popularity/4056> has
>> certainly grown since this Intent was sent (now between 0.1-0.2%). However,
>> I'm hopeful nobody is using canTransition. It's not documented anywhere,
>> whereas canIntercept is. I did some GitHub code searches (e.canTransition
>> <https://github.com/search?q=%2Fe%5C.canTransition%2F+language%3AJavaScript&type=code>,
>> event.canTransition
>> <https://github.com/search?q=%2Fevent%5C.canTransition%2F+language%3AJavaScript&type=code>,
>> and a much-noisier canTransition
>> <https://github.com/search?q=%2FcanTransition%2F+language%3AJavaScript&type=code>)
>> and didn't find anything that would break: there was one case where it was
>> being logged informationally, and a couple other cases where it was being
>> used alongside transitionWhile(). Since transitionWhile() does not exist
>> anymore, such code is already broken and thus likely not being used in the
>> wild.
>>
>> Which path of action would the API owners prefer?
>>
>>    - Immediately disable canTransition, with a Finch flag to reenable it
>>    if that breaks something, based on the approval of this intent.
>>
>>
> I'm supportive of immediately disabling, to minimize the chance we won't
> be able to remove it later in case usage increases.
>

+1 (with a finch flag)


>
>
>>
>>    - Add use counters and UKM, and wait for them to reach stable. Then,
>>    assuming all looks good, send a second Intent to Remove.
>>
>>
>> On Wednesday, June 29, 2022 at 11:47:58 PM UTC+9 Mike West wrote:
>>
>>> LGTM3.
>>>
>>> -mike
>>>
>>>
>>> On Wed, Jun 22, 2022 at 6:57 PM Mike Taylor <miketa...@chromium.org>
>>> wrote:
>>>
>>>> LGTM2
>>>>
>>>> On 6/22/22 12:24 PM, Chris Harrelson wrote:
>>>>
>>>> LGTM1
>>>>
>>>> On Tue, Jun 14, 2022 at 11:25 AM Nate Chapin <jap...@chromium.org>
>>>> wrote:
>>>>
>>>>> Contact emails
>>>>>
>>>>> jap...@chromium.org, dome...@chromium.org
>>>>>
>>>>> Specification
>>>>>
>>>>> https://github.com/WICG/navigation-api/pull/235
>>>>>
>>>>> Summary
>>>>>
>>>>> transitionWhile() is being replaced by navigateEvent.intercept() due
>>>>> to design flaws reported by developers.
>>>>>
>>>>> The flaws in transitionWhile() were discussed in
>>>>> https://github.com/WICG/navigation-api/issues/230,
>>>>>
>>>>> the spec update to replace transitionWhile() with intercept() is at
>>>>> https://github.com/WICG/navigation-api/pull/235, and the introduction
>>>>> of intercept() has its own chromestatus entry at
>>>>> https://chromestatus.com/feature/5194055716700160.
>>>>>
>>>>>
>>>>> Blink component
>>>>>
>>>>> Blink>History
>>>>> <https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3EHistory>
>>>>>
>>>>> Motivation
>>>>>
>>>>> transitionWhile() has design issues that have meant developers have
>>>>> found it difficult to use effectively, detailed in
>>>>> https://github.com/WICG/navigation-api/issues/230#issuecomment-1137891972
>>>>>
>>>>> intercept() is being introduced to provide a more usable API for the
>>>>> same basic functionality of transitionWhile().
>>>>>
>>>>>
>>>>> Initial public proposal
>>>>>
>>>>> https://github.com/WICG/navigation-api/pull/235
>>>>>
>>>>> TAG review
>>>>>
>>>>> https://github.com/w3ctag/design-reviews/issues/717
>>>>>
>>>>> TAG review status
>>>>>
>>>>> Issues open
>>>>>
>>>>> Risks
>>>>>
>>>>> Interoperability and Compatibility
>>>>>
>>>>> For those migrating to intercept(), the main risk is that web
>>>>> developer "handling" logic will run at a subtly different time, but per 
>>>>> the
>>>>> explainer that time will actually be less buggy in the usual case.
>>>>>
>>>>> Also, transitionWhile() only recently shipped (M102). There are few
>>>>> consumers of the API, and we are in contact with most of them already, so
>>>>> we believe we can guide them on any migration challenges they might have.
>>>>>
>>>>> The overall use counter for the navigation API (
>>>>> https://chromestatus.com/metrics/feature/timeline/popularity/4056)
>>>>> shows 0.000097% of pages on the web using any portion of the API, which
>>>>> provides an upper bound on the potential breakage here. (That use counter
>>>>> also counts various other entry points to the API, which are not being
>>>>> changed.)
>>>>>
>>>>> We plan to support both intercept() and transitionWhile() for 3
>>>>> releases to provide a migration period (adding intercept() in M105,
>>>>> removing transitionWhile() in M108).
>>>>>
>>>>>
>>>>> Gecko: No signal
>>>>> https://github.com/mozilla/standards-positions/issues/543 remains
>>>>> open as the positions request for the original API.
>>>>>
>>>>> WebKit: No signal
>>>>> https://www.mail-archive.com/webkit-dev@lists.webkit.org/msg30257.html
>>>>> remains open as the positions request for the original API.
>>>>>
>>>>> Web developers: Positive The problem this was solving was discovered
>>>>> by a web developer in
>>>>> https://github.com/WICG/navigation-api/issues/230, and has some
>>>>> engagement there.
>>>>>
>>>>> 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?
>>>>>
>>>>>
>>>>> Debuggability
>>>>>
>>>>> N/A
>>>>>
>>>>>
>>>>> Is this feature fully tested by web-platform-tests
>>>>> <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>
>>>>> ?
>>>>>
>>>>> No
>>>>>
>>>>>
>>>>> Requires code in //chrome?
>>>>>
>>>>> False
>>>>>
>>>>> Tracking bug
>>>>>
>>>>> https://bugs.chromium.org/p/chromium/issues/detail?id=1336000
>>>>>
>>>>> Estimated milestones
>>>>>
>>>>> Deprecate: M105. Remove: M108.
>>>>>
>>>>>
>>>>> Link to entry on the Chrome Platform Status
>>>>>
>>>>> https://chromestatus.com/feature/5169970311856128
>>>>>
>>>>> This intent message was generated by Chrome Platform Status
>>>>> <https://chromestatus.com/>.
>>>>>
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