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Description
Do you plan to support Region Override through Unicode Locale Extension:
Unicode Locale extensions seem to be managed internally.
const custom = new Intl.Locale('en-US-u-rg-gbzzzz-hc-h24');
console.log(custom.toString()); // en-US-u-rg-gbzzzz-hc-h24The hour cycle and region override extensions are inverted from the toString method.
So, I guess the internal implementation holds all Unicode Locale Extensions but the region override is not take into account to format number, date and so on.
const locale = new Intl.Locale('en-US-u-rg-gbzzzz');
console.log(locale.toString()); // OK: en-US-u-rg-gbzzzz
console.log(locale.language); // OK: en
console.log(locale.region); // OK: US
const date = new Date(Date.UTC(2012, 11, 20, 3, 0, 0));
console.log('US: ' + new Intl.DateTimeFormat('en-US').format(date)); // OK: 12/20/2012
console.log('GB: ' + new Intl.DateTimeFormat('en-GB').format(date)); // OK: 20/12/2012
console.log('GB w/ Region Override: ' + new Intl.DateTimeFormat(locale).format(date)); // KO: 12/20/2012 -> should display 20/12/2012According to the spec, the region is used as default for:
- currency
- calendar
- week data
- time cycle
- measurement system
- unit preferences
- number format
- currency format
- date/time format
Java 10 supports region override as expected:
import java.text.DateFormat;
import java.text.NumberFormat;
import java.time.LocalDate;
import java.time.Month;
import java.time.format.DateTimeFormatter;
import java.time.format.FormatStyle;
import java.util.Currency;
import java.util.Locale;
class Main {
public static void main(String[] args) {
Locale locale = Locale.forLanguageTag("en-US-u-rg-gbzzzz");
System.out.println(locale.getLanguage());
System.out.println(locale.getCountry());
LocalDate date = LocalDate.of(2012, Month.NOVEMBER, 20);
DateTimeFormatter dtf = DateTimeFormatter.ofLocalizedDate(FormatStyle.SHORT);
System.out.println("GB: " + date.format(dtf.localizedBy(Locale.forLanguageTag("en-US")))); // OK: 12/20/12
System.out.println("GB: " + date.format(dtf.localizedBy(Locale.forLanguageTag("en-GB")))); // OK: 20/12/2012
System.out.println("GB w/ Region Override: " + date.format(dtf.localizedBy(locale))); // OK: 20/12/2012
}
}Related issues:
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