On Thu, Feb 13, 2025 at 11:06 PM Chromestatus <
ad...@cr-status.appspotmail.com> wrote:

> Contact emails le...@chromium.org
>
> Explainer https://github.com/whatwg/xhr/pull/394
>
> Specification https://whatpr.org/xhr/394.html#interface-progressevent
>
> Summary
>
> The ProgressEvent has attributes `loaded` and `total` indicating the
> progress, and their type is `unsigned long long` now. With this feature,
> the type for these two attributes is changed to `double` instead, which
> gives the developer more control over the value. For example, the
> developers can now create a ProgressEvent with the `total` of 1 and the
> `loaded` increasing from 0 to 1 gradually. This is aligned with the default
> behavior of the <progress> HTML element if the max attribute is omitted.
>
>
> Blink component Blink
> <https://issues.chromium.org/issues?q=customfield1222907:%22Blink%22>
>
> TAG review None
>
> TAG review status Pending
>
> Risks
>
>
> Interoperability and Compatibility
>
> This change will not be visible if the web developers implement the
> ProgressEvent using non-negative integer in the loaded or total fields.
> However, if a negative number or a decimal number is used, it would be
> converted to unsigned integer before, but will be returned without any
> conversion after this feature is introduced. For example - `new
> ProgressEvent("event", { loaded: 1.1 }).loaded` is 1 now, but it will be
> 1.1 after the change. - `new ProgressEvent("event", { loaded: -1 }).loaded`
> is 18446744073709552000 now, but it will be -1 after the change.
>
>
> *Gecko*: Positive (
> https://github.com/whatwg/xhr/pull/394#issuecomment-2607316190)
>
> *WebKit*: Positive (
> https://github.com/whatwg/xhr/pull/394#issuecomment-2603844507)
>
> *Web developers*: Positive (
> https://github.com/webmachinelearning/writing-assistance-apis/issues/15)
>
> *Other signals*:
>
> 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?
>
> None
>
>
> Debuggability
>
> None
>
>
> Will this feature be supported on all six Blink platforms (Windows, Mac,
> Linux, ChromeOS, Android, and Android WebView)? No
>
> 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/xhr/progress-events-response-data-gzip.htm?label=experimental&label=master&aligned
> https://wpt.fyi/results/xhr/progressevent-constructor.html?label=experimental&label=master&aligned
> https://wpt.fyi/results/xhr/progressevent-interface.html?label=experimental&label=master&aligned
>
>
> Flag name on about://flags None
>
> Finch feature name None


Fine with no Finch, but a kill switch should be included on a change like
this, just in case there is more breakage than anticipated. Even better, if
possible, would be UseCounter measurements of how often sites would see
different behavior.

Stephen.


>
>
> Non-finch justification
>
> This feature changes the definition of existing implementation of
> ProgressEvent so it's not possible to conduct a finch experiment.
>
>
> Requires code in //chrome? False
>
> Estimated milestones
> Shipping on desktop 135
>
> 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).
> None
>
> Link to entry on the Chrome Platform Status
> https://chromestatus.com/feature/5067669587623936?gate=5176277298053120
>
> This intent message was generated by Chrome Platform Status
> <https://chromestatus.com>.
>
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