Contact emailsft...@google.com

Explainerhttps://github.com/tc39/proposal-intl-duration-format

Specificationhttps://tc39.es/proposal-intl-duration-format

Design docs
https://docs.google.com/document/d/1UMwkeeiqVyVNhNW8CS1vwN9g2cIH0AryaU16DT-vGg0/edit

Summary

Intl.DurationFormat API is a TC39 ECMA402 proposal See
https://github.com/tc39/proposal-intl-duration-format for the proposal The
proposal advanced to Stage 3 on 2021-10 Spec:
https://tc39.es/proposal-intl-duration-format/


Blink componentBlink>JavaScript>Internationalization
<https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3EJavaScript%3EInternationalization>

TAG reviewNone

TAG review statusNot applicable

Risks


Interoperability and Compatibility

The spec is sync with Temporal . If Temporal dramatically change the
definition of Temporal Duration, we may need to adjust the implemetation


*Gecko*: Positive (https://bugzilla.mozilla.org/show_bug.cgi?id=1648139)

*WebKit*: Shipped/Shipping (https://bugs.webkit.org/show_bug.cgi?id=214794)
https://developer.apple.com/documentation/safari-release-notes/safari-16_4-release-notes

*Web developers*: Positive (https://github.com/tc39/ecma402-mdn/issues/22)
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/DurationFormat

*Other signals*:

Ergonomics

Temporal.Duration as defined in
https://tc39.es/proposal-temporal/#sec-temporal-maximumtemporaldurationroundingincrement


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?

low


Goals for experimentation



Ongoing technical constraints

None


Debuggability



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://github.com/tc39/test262/issues/3305


Flag name on chrome://flagsharmony_intl_duration_format

Finch feature nameNone

Non-finch justification

v8


Requires code in //chrome?False

Tracking bughttps://bugs.chromium.org/p/v8/issues/detail?id=11660

MeasurementUse Count CL is under review in
https://chromium-review.googlesource.com/c/chromium/src/+/5646725

Availability expectationFeature is available on Web Platform mainline
within 6 months of launch in Chrome.

Adoption expectationFeature is considered a best practice for some use case
within 6 months of reaching Web Platform baseline.

Adoption planintl dev team inside google will rewrite closure duration
format to use this feature with a thinner wrapper

Non-OSS dependencies

Does the feature depend on any code or APIs outside the Chromium open
source repository and its open-source dependencies to function?
The feature depend on ICU and therefore also CLDR project

Estimated milestones
DevTrial on desktop 128
DevTrial on Android 128

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).
https://github.com/tc39/proposal-intl-duration-format/issues

Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/5193021205774336

Links to previous Intent discussionsIntent to prototype:
https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAOcELL-vykLL8UDTG1QcKptGfyRPw8T6StP2%2BqMPFv09aUHPbg%40mail.gmail.com

This intent message was generated by Chrome Platform Status
<https://chromestatus.com/>.

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