Bug 238437

Summary:	Intl.NumberFormat.formatRange(), Intl.NumberFormat.formatRangeToParts(), and Intl.PluralRules.selectRange() are not available
Product:	WebKit	Reporter:	Alan Davalos <alanodaval>
Component:	New Bugs	Assignee:	Nobody <webkit-unassigned>
Status:	RESOLVED WONTFIX
Severity:	Normal	CC:	jond, mmaxfield, webkit-bug-importer, ysuzuki
Priority:	P2	Keywords:	InRadar
Version:	Safari 15
Hardware:	Mac (Intel)
OS:	macOS 10.15

Description Alan Davalos 2022-03-27 23:18:27 PDT

The release notes for Safari 15.4 mention that Intl.NumberFormat.formatRange(), Intl.NumberFormat.formatRangeToParts(), and Intl.PluralRules.selectRange() have all been added.

https://developer.apple.com/documentation/safari-release-notes/safari-15_4-release-notes

However, doing some simple tests, all of the functions above are undefined

new Intl.NumberFormat('de-DE').formatRange; // undefined
new Intl.NumberFormat('de-DE').formatRangeToParts; // undefined

new Intl.PluralRules('de-DE').selectRange; // undefined

I've tested the other Intl features added in 15.4 but every other feature except these three seem to be implemented correctly

Comment 1 Radar WebKit Bug Importer 2022-03-28 06:42:58 PDT

<rdar://problem/90919466>

Comment 2 Yusuke Suzuki 2022-03-28 10:25:23 PDT

Thanks.
This needs the latest macOS / iOS update too since it relies on the system-installed ICU.
So, please update the OS to update the system ICU.