"numberingSystem" option for Intl.NumberFormat / "calendar" and "numberingSystem" option for Intl.DateTimeFormat

Allows the calendar and numbering system to be specified in the options object of the DateTimeFormat() and NumberFormat() constructors.

A use case for these options are locals with two numbering systems or calendars. The user agent default may be the non-Western one, but in some contexts Western systems are more appropriate. Currently, applications need to parse the BCP 47 language tag. This feature makes it simpler for the developer.



Public discussion

Status in Chromium


Behind a flag (tracking bug) in:

  • Chrome for desktop release 78
  • Chrome for Android release 78
  • Android WebView release 78

Consensus & Standardization

After a feature ships in Chrome, the values listed here are not guaranteed to be up to date.

  • No public signals
  • No public signals
  • No public signals
  • No signals


Last updated on 2019-10-09